./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep20-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/reducercommutativity/sep20-1.i -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 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:04:11,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:04:11,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:04:11,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:04:11,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:04:11,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:04:11,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:04:11,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:04:11,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:04:11,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:04:11,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:04:11,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:04:11,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:04:11,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:04:11,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:04:11,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:04:11,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:04:11,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:04:11,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:04:11,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:04:11,134 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:04:11,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:04:11,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:04:11,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:04:11,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:04:11,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:04:11,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:04:11,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:04:11,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:04:11,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:04:11,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:04:11,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:04:11,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:04:11,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:04:11,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:04:11,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:04:11,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:04:11,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:04:11,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:04:11,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:04:11,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:04:11,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:04:11,152 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:04:11,173 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:04:11,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:04:11,174 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:04:11,174 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:04:11,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:04:11,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:04:11,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:04:11,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:04:11,175 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:04:11,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:04:11,175 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:04:11,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:04:11,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:04:11,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:04:11,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:04:11,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:04:11,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:04:11,176 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:04:11,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:04:11,176 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:04:11,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:04:11,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:04:11,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:04:11,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:04:11,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:04:11,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:04:11,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:04:11,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:04:11,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:04:11,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:04:11,177 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:04:11,177 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:04:11,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:04:11,177 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c [2022-07-20 21:04:11,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:04:11,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:04:11,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:04:11,376 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:04:11,376 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:04:11,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep20-1.i [2022-07-20 21:04:11,443 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df9549521/430ec9d778f64e0393508e6160dd9200/FLAGaf8026053 [2022-07-20 21:04:11,811 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:04:11,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep20-1.i [2022-07-20 21:04:11,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df9549521/430ec9d778f64e0393508e6160dd9200/FLAGaf8026053 [2022-07-20 21:04:12,224 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df9549521/430ec9d778f64e0393508e6160dd9200 [2022-07-20 21:04:12,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:04:12,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:04:12,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:04:12,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:04:12,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:04:12,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:04:12" (1/1) ... [2022-07-20 21:04:12,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5609adbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:12, skipping insertion in model container [2022-07-20 21:04:12,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:04:12" (1/1) ... [2022-07-20 21:04:12,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:04:12,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:04:12,442 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/reducercommutativity/sep20-1.i[1293,1306] [2022-07-20 21:04:12,444 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:04:12,453 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:04:12,484 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/reducercommutativity/sep20-1.i[1293,1306] [2022-07-20 21:04:12,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:04:12,496 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:04:12,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:12 WrapperNode [2022-07-20 21:04:12,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:04:12,498 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:04:12,498 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:04:12,498 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:04:12,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:12" (1/1) ... [2022-07-20 21:04:12,515 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:12" (1/1) ... [2022-07-20 21:04:12,532 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-20 21:04:12,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:04:12,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:04:12,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:04:12,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:04:12,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:12" (1/1) ... [2022-07-20 21:04:12,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:12" (1/1) ... [2022-07-20 21:04:12,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:12" (1/1) ... [2022-07-20 21:04:12,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:12" (1/1) ... [2022-07-20 21:04:12,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:12" (1/1) ... [2022-07-20 21:04:12,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:12" (1/1) ... [2022-07-20 21:04:12,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:12" (1/1) ... [2022-07-20 21:04:12,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:04:12,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:04:12,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:04:12,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:04:12,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:12" (1/1) ... [2022-07-20 21:04:12,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:04:12,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:12,599 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) [2022-07-20 21:04:12,611 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 [2022-07-20 21:04:12,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:04:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:04:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:04:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:04:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:04:12,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:04:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:04:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:04:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-07-20 21:04:12,632 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-07-20 21:04:12,689 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:04:12,690 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:04:12,835 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:04:12,839 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:04:12,839 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 21:04:12,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:04:12 BoogieIcfgContainer [2022-07-20 21:04:12,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:04:12,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:04:12,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:04:12,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:04:12,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:04:12" (1/3) ... [2022-07-20 21:04:12,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba9c970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:04:12, skipping insertion in model container [2022-07-20 21:04:12,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:04:12" (2/3) ... [2022-07-20 21:04:12,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba9c970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:04:12, skipping insertion in model container [2022-07-20 21:04:12,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:04:12" (3/3) ... [2022-07-20 21:04:12,848 INFO L111 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2022-07-20 21:04:12,858 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:04:12,858 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:04:12,890 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:04:12,894 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@5f4ad231, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7f07f94b [2022-07-20 21:04:12,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:04:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:12,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 21:04:12,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:12,905 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:12,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:12,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:12,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2022-07-20 21:04:12,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:12,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010748590] [2022-07-20 21:04:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:12,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:13,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:04:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:13,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-20 21:04:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:13,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:04:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:04:13,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:13,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010748590] [2022-07-20 21:04:13,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010748590] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:04:13,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:04:13,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:04:13,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533395386] [2022-07-20 21:04:13,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:04:13,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:04:13,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:13,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:04:13,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:04:13,151 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:04:13,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:13,188 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2022-07-20 21:04:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:04:13,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-20 21:04:13,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:13,195 INFO L225 Difference]: With dead ends: 52 [2022-07-20 21:04:13,195 INFO L226 Difference]: Without dead ends: 25 [2022-07-20 21:04:13,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:04:13,201 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:13,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-20 21:04:13,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-20 21:04:13,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:13,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-07-20 21:04:13,231 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-07-20 21:04:13,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:13,232 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-07-20 21:04:13,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:04:13,233 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-07-20 21:04:13,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 21:04:13,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:13,235 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:13,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:04:13,236 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:13,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:13,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2022-07-20 21:04:13,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:13,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719647166] [2022-07-20 21:04:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:13,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:13,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-20 21:04:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:13,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 21:04:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:13,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:04:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:04:13,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:13,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719647166] [2022-07-20 21:04:13,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719647166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:13,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161912243] [2022-07-20 21:04:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:13,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:13,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:13,368 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) [2022-07-20 21:04:13,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:04:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:13,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 21:04:13,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:04:13,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:04:13,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161912243] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:04:13,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:04:13,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-20 21:04:13,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100886667] [2022-07-20 21:04:13,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:04:13,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:04:13,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:13,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:04:13,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:04:13,486 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:04:13,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:13,495 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-07-20 21:04:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:04:13,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-20 21:04:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:13,496 INFO L225 Difference]: With dead ends: 45 [2022-07-20 21:04:13,496 INFO L226 Difference]: Without dead ends: 27 [2022-07-20 21:04:13,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:04:13,498 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:13,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-20 21:04:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-20 21:04:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-20 21:04:13,502 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2022-07-20 21:04:13,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:13,502 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-20 21:04:13,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:04:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-20 21:04:13,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 21:04:13,504 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:13,504 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:13,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:13,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:13,720 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:13,720 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2022-07-20 21:04:13,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:13,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50960648] [2022-07-20 21:04:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:13,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:13,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-20 21:04:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:13,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:04:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:13,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:04:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 21:04:13,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:13,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50960648] [2022-07-20 21:04:13,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50960648] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:13,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334827960] [2022-07-20 21:04:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:13,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:13,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:13,826 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) [2022-07-20 21:04:13,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:04:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:13,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 21:04:13,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 21:04:13,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:04:13,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334827960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:04:13,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:04:13,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-20 21:04:13,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582278905] [2022-07-20 21:04:13,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:04:13,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:04:13,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:13,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:04:13,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:04:13,924 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:04:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:13,937 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-07-20 21:04:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:04:13,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-07-20 21:04:13,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:13,939 INFO L225 Difference]: With dead ends: 41 [2022-07-20 21:04:13,939 INFO L226 Difference]: Without dead ends: 27 [2022-07-20 21:04:13,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:04:13,942 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:13,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:13,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-20 21:04:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-07-20 21:04:13,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-07-20 21:04:13,952 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2022-07-20 21:04:13,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:13,953 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-07-20 21:04:13,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:04:13,954 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-07-20 21:04:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 21:04:13,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:13,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:13,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:14,166 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,SelfDestructingSolverStorable2 [2022-07-20 21:04:14,166 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2022-07-20 21:04:14,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:14,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808021065] [2022-07-20 21:04:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:14,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:14,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-20 21:04:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:14,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:04:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:14,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-20 21:04:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:04:14,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:14,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808021065] [2022-07-20 21:04:14,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808021065] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:14,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115016702] [2022-07-20 21:04:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:14,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:14,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:14,239 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) [2022-07-20 21:04:14,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:04:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:14,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:04:14,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:04:14,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:04:14,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115016702] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:14,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:14,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-20 21:04:14,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166321924] [2022-07-20 21:04:14,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:14,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 21:04:14,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:14,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 21:04:14,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:04:14,386 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:04:14,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:14,416 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-07-20 21:04:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 21:04:14,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-07-20 21:04:14,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:14,417 INFO L225 Difference]: With dead ends: 58 [2022-07-20 21:04:14,417 INFO L226 Difference]: Without dead ends: 37 [2022-07-20 21:04:14,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:04:14,418 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:14,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:14,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-20 21:04:14,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-20 21:04:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-07-20 21:04:14,422 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2022-07-20 21:04:14,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:14,423 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-07-20 21:04:14,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:04:14,423 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-07-20 21:04:14,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 21:04:14,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:14,424 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:14,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:14,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:14,631 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:14,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:14,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2022-07-20 21:04:14,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:14,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102693672] [2022-07-20 21:04:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:14,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:14,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-20 21:04:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:14,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-20 21:04:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:14,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:04:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-20 21:04:14,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:14,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102693672] [2022-07-20 21:04:14,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102693672] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:14,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450638683] [2022-07-20 21:04:14,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:04:14,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:14,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:14,735 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) [2022-07-20 21:04:14,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:04:14,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:04:14,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:14,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 21:04:14,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-20 21:04:14,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-20 21:04:14,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450638683] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:14,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:14,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-20 21:04:14,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193019662] [2022-07-20 21:04:14,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:14,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:04:14,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:14,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:04:14,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:04:14,908 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-20 21:04:14,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:14,967 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2022-07-20 21:04:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 21:04:14,968 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-07-20 21:04:14,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:14,970 INFO L225 Difference]: With dead ends: 74 [2022-07-20 21:04:14,970 INFO L226 Difference]: Without dead ends: 50 [2022-07-20 21:04:14,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:04:14,971 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:14,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 111 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:14,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-20 21:04:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-07-20 21:04:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:14,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-07-20 21:04:14,979 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2022-07-20 21:04:14,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:14,979 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-07-20 21:04:14,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-20 21:04:14,979 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-07-20 21:04:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-20 21:04:14,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:14,980 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:15,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:15,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:15,188 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:15,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:15,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2022-07-20 21:04:15,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:15,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982703432] [2022-07-20 21:04:15,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:15,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:15,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:04:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:15,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-20 21:04:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:15,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:04:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-20 21:04:15,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:15,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982703432] [2022-07-20 21:04:15,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982703432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:15,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165281487] [2022-07-20 21:04:15,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:04:15,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:15,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:15,360 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) [2022-07-20 21:04:15,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:04:15,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:04:15,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:15,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:04:15,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-20 21:04:15,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-20 21:04:15,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165281487] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:15,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:15,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-20 21:04:15,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44756740] [2022-07-20 21:04:15,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:15,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 21:04:15,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:15,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 21:04:15,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:04:15,515 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:04:15,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:15,566 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-07-20 21:04:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 21:04:15,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-07-20 21:04:15,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:15,568 INFO L225 Difference]: With dead ends: 90 [2022-07-20 21:04:15,568 INFO L226 Difference]: Without dead ends: 64 [2022-07-20 21:04:15,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:04:15,569 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:15,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 118 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:15,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-20 21:04:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-07-20 21:04:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-07-20 21:04:15,575 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 70 [2022-07-20 21:04:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:15,576 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-07-20 21:04:15,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:04:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-07-20 21:04:15,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-20 21:04:15,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:15,577 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:15,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:15,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:15,793 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:15,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:15,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2138241293, now seen corresponding path program 4 times [2022-07-20 21:04:15,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:15,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701994229] [2022-07-20 21:04:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:15,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:15,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-20 21:04:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:15,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-20 21:04:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:15,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-20 21:04:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-07-20 21:04:15,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:15,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701994229] [2022-07-20 21:04:15,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701994229] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:15,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807911037] [2022-07-20 21:04:15,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:04:15,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:15,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:15,974 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) [2022-07-20 21:04:15,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:04:16,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:04:16,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:16,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 21:04:16,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-07-20 21:04:16,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-07-20 21:04:16,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807911037] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:16,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:16,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2022-07-20 21:04:16,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674734954] [2022-07-20 21:04:16,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:16,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 21:04:16,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:16,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 21:04:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:04:16,251 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:04:16,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:16,306 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2022-07-20 21:04:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 21:04:16,306 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 108 [2022-07-20 21:04:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:16,307 INFO L225 Difference]: With dead ends: 119 [2022-07-20 21:04:16,307 INFO L226 Difference]: Without dead ends: 81 [2022-07-20 21:04:16,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:04:16,309 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:16,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 74 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:16,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-20 21:04:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-20 21:04:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2022-07-20 21:04:16,331 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 108 [2022-07-20 21:04:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:16,331 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2022-07-20 21:04:16,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:04:16,332 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2022-07-20 21:04:16,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-20 21:04:16,333 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:16,333 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:16,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:16,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:16,551 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:16,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:16,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2004558111, now seen corresponding path program 5 times [2022-07-20 21:04:16,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:16,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272920789] [2022-07-20 21:04:16,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:16,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:16,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-20 21:04:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:16,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-20 21:04:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:16,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-20 21:04:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-07-20 21:04:16,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:16,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272920789] [2022-07-20 21:04:16,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272920789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:16,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870554269] [2022-07-20 21:04:16,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:04:16,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:16,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:16,679 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) [2022-07-20 21:04:16,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:04:18,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-07-20 21:04:18,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:18,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:04:18,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2022-07-20 21:04:18,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-07-20 21:04:18,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870554269] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:18,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:18,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-20 21:04:18,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200513062] [2022-07-20 21:04:18,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:18,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 21:04:18,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:18,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 21:04:18,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-07-20 21:04:18,567 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:04:18,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:18,603 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2022-07-20 21:04:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 21:04:18,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2022-07-20 21:04:18,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:18,604 INFO L225 Difference]: With dead ends: 142 [2022-07-20 21:04:18,605 INFO L226 Difference]: Without dead ends: 105 [2022-07-20 21:04:18,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-07-20 21:04:18,606 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:18,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 96 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-20 21:04:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-07-20 21:04:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2022-07-20 21:04:18,612 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 126 [2022-07-20 21:04:18,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:18,612 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2022-07-20 21:04:18,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:04:18,612 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2022-07-20 21:04:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-07-20 21:04:18,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:18,614 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 20, 20, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:18,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:18,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:18,820 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:18,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:18,820 INFO L85 PathProgramCache]: Analyzing trace with hash 848751647, now seen corresponding path program 6 times [2022-07-20 21:04:18,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:18,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485482942] [2022-07-20 21:04:18,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:18,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:18,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-20 21:04:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:19,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-20 21:04:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:19,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-07-20 21:04:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 1601 trivial. 0 not checked. [2022-07-20 21:04:19,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:19,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485482942] [2022-07-20 21:04:19,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485482942] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:19,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338399520] [2022-07-20 21:04:19,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:04:19,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:19,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:19,057 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) [2022-07-20 21:04:19,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:04:19,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-20 21:04:19,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:19,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:04:19,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 1242 proven. 4 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2022-07-20 21:04:19,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2022-07-20 21:04:19,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338399520] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:19,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:19,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-07-20 21:04:19,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204408080] [2022-07-20 21:04:19,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:19,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 21:04:19,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:19,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 21:04:19,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:04:19,272 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:04:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:19,319 INFO L93 Difference]: Finished difference Result 179 states and 223 transitions. [2022-07-20 21:04:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 21:04:19,319 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 198 [2022-07-20 21:04:19,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:19,320 INFO L225 Difference]: With dead ends: 179 [2022-07-20 21:04:19,320 INFO L226 Difference]: Without dead ends: 118 [2022-07-20 21:04:19,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:04:19,321 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:19,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 236 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-20 21:04:19,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2022-07-20 21:04:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.162162162162162) internal successors, (129), 111 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2022-07-20 21:04:19,327 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 198 [2022-07-20 21:04:19,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:19,328 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2022-07-20 21:04:19,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:04:19,328 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2022-07-20 21:04:19,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-20 21:04:19,329 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:19,329 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:19,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:19,543 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,SelfDestructingSolverStorable8 [2022-07-20 21:04:19,544 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:19,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:19,544 INFO L85 PathProgramCache]: Analyzing trace with hash -217509715, now seen corresponding path program 7 times [2022-07-20 21:04:19,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:19,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37757055] [2022-07-20 21:04:19,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:19,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:19,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-20 21:04:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:19,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:04:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:19,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-07-20 21:04:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2022-07-20 21:04:19,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:19,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37757055] [2022-07-20 21:04:19,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37757055] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:19,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524574393] [2022-07-20 21:04:19,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:04:19,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:19,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:19,797 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) [2022-07-20 21:04:19,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:04:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:19,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 21:04:19,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:20,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 1414 proven. 330 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2022-07-20 21:04:20,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2022-07-20 21:04:20,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524574393] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:20,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:20,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 22 [2022-07-20 21:04:20,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627146216] [2022-07-20 21:04:20,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:20,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 21:04:20,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:20,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 21:04:20,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-20 21:04:20,126 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:04:20,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:20,173 INFO L93 Difference]: Finished difference Result 203 states and 252 transitions. [2022-07-20 21:04:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 21:04:20,174 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 215 [2022-07-20 21:04:20,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:20,175 INFO L225 Difference]: With dead ends: 203 [2022-07-20 21:04:20,175 INFO L226 Difference]: Without dead ends: 131 [2022-07-20 21:04:20,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 431 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-20 21:04:20,179 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:20,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 152 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:20,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-20 21:04:20,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-07-20 21:04:20,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 126 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:20,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2022-07-20 21:04:20,192 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 215 [2022-07-20 21:04:20,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:20,193 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2022-07-20 21:04:20,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:04:20,194 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2022-07-20 21:04:20,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-20 21:04:20,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:20,196 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:20,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:20,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 21:04:20,400 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:20,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:20,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2054059049, now seen corresponding path program 8 times [2022-07-20 21:04:20,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:20,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745418708] [2022-07-20 21:04:20,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:20,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:20,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-20 21:04:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:20,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-20 21:04:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:20,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-07-20 21:04:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-07-20 21:04:20,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:20,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745418708] [2022-07-20 21:04:20,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745418708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:20,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052239764] [2022-07-20 21:04:20,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:04:20,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:20,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:20,549 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) [2022-07-20 21:04:20,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:04:20,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:04:20,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:20,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:04:20,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 2490 proven. 36 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2022-07-20 21:04:20,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-07-20 21:04:20,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052239764] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:20,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:20,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-20 21:04:20,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673290068] [2022-07-20 21:04:20,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:20,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 21:04:20,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:20,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 21:04:20,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:04:20,860 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:04:20,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:20,895 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2022-07-20 21:04:20,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 21:04:20,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 260 [2022-07-20 21:04:20,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:20,896 INFO L225 Difference]: With dead ends: 218 [2022-07-20 21:04:20,897 INFO L226 Difference]: Without dead ends: 147 [2022-07-20 21:04:20,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:04:20,897 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:20,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 95 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:20,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-07-20 21:04:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-07-20 21:04:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.1619718309859155) internal successors, (165), 142 states have internal predecessors, (165), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2022-07-20 21:04:20,902 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 260 [2022-07-20 21:04:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:20,902 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2022-07-20 21:04:20,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:04:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2022-07-20 21:04:20,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-07-20 21:04:20,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:20,904 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:20,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:21,119 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,SelfDestructingSolverStorable10 [2022-07-20 21:04:21,119 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:21,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:21,120 INFO L85 PathProgramCache]: Analyzing trace with hash -371662137, now seen corresponding path program 9 times [2022-07-20 21:04:21,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:21,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731730800] [2022-07-20 21:04:21,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:21,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:21,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-20 21:04:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:21,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-20 21:04:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:21,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-07-20 21:04:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-07-20 21:04:21,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:21,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731730800] [2022-07-20 21:04:21,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731730800] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:21,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341528343] [2022-07-20 21:04:21,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:04:21,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:21,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:21,345 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) [2022-07-20 21:04:21,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:04:24,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-20 21:04:24,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:24,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-20 21:04:24,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 2490 proven. 196 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2022-07-20 21:04:24,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-07-20 21:04:24,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341528343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:24,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:24,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-07-20 21:04:24,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985582829] [2022-07-20 21:04:24,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:24,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 21:04:24,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:24,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 21:04:24,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-20 21:04:24,910 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:04:24,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:24,948 INFO L93 Difference]: Finished difference Result 228 states and 277 transitions. [2022-07-20 21:04:24,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 21:04:24,949 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 276 [2022-07-20 21:04:24,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:24,950 INFO L225 Difference]: With dead ends: 228 [2022-07-20 21:04:24,950 INFO L226 Difference]: Without dead ends: 157 [2022-07-20 21:04:24,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 552 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-20 21:04:24,951 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:24,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 72 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:04:24,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-20 21:04:24,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-07-20 21:04:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.1513157894736843) internal successors, (175), 152 states have internal predecessors, (175), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:04:24,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 181 transitions. [2022-07-20 21:04:24,956 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 181 transitions. Word has length 276 [2022-07-20 21:04:24,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:24,956 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 181 transitions. [2022-07-20 21:04:24,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 21:04:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 181 transitions. [2022-07-20 21:04:24,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-07-20 21:04:24,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:24,959 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:24,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:25,179 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,SelfDestructingSolverStorable11 [2022-07-20 21:04:25,179 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:25,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:25,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2076360355, now seen corresponding path program 10 times [2022-07-20 21:04:25,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:25,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535369478] [2022-07-20 21:04:25,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:25,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:27,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-20 21:04:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:27,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-20 21:04:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:27,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-07-20 21:04:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 116 proven. 5524 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2022-07-20 21:04:29,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:29,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535369478] [2022-07-20 21:04:29,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535369478] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:29,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371138336] [2022-07-20 21:04:29,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:04:29,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:29,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:29,008 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) [2022-07-20 21:04:29,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:04:32,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:04:32,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:32,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 148 conjunts are in the unsatisfiable core [2022-07-20 21:04:32,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2022-07-20 21:04:33,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5314 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2022-07-20 21:04:36,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371138336] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:36,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:36,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 30, 31] total 97 [2022-07-20 21:04:36,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351368356] [2022-07-20 21:04:36,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:36,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-20 21:04:36,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:36,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-20 21:04:36,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=9011, Unknown=0, NotChecked=0, Total=9312 [2022-07-20 21:04:36,208 INFO L87 Difference]: Start difference. First operand 157 states and 181 transitions. Second operand has 97 states, 95 states have (on average 2.473684210526316) internal successors, (235), 88 states have internal predecessors, (235), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-20 21:04:41,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:41,516 INFO L93 Difference]: Finished difference Result 902 states and 1308 transitions. [2022-07-20 21:04:41,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-20 21:04:41,517 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 95 states have (on average 2.473684210526316) internal successors, (235), 88 states have internal predecessors, (235), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 286 [2022-07-20 21:04:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:41,522 INFO L225 Difference]: With dead ends: 902 [2022-07-20 21:04:41,523 INFO L226 Difference]: Without dead ends: 898 [2022-07-20 21:04:41,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 558 SyntacticMatches, 8 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2602 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=329, Invalid=9571, Unknown=0, NotChecked=0, Total=9900 [2022-07-20 21:04:41,525 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 198 mSDsluCounter, 6197 mSDsCounter, 0 mSdLazyCounter, 12523 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 6317 SdHoareTripleChecker+Invalid, 12668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 12523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:41,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 6317 Invalid, 12668 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [145 Valid, 12523 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-07-20 21:04:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-07-20 21:04:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 584. [2022-07-20 21:04:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 576 states have (on average 1.2864583333333333) internal successors, (741), 577 states have internal predecessors, (741), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-20 21:04:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 755 transitions. [2022-07-20 21:04:41,581 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 755 transitions. Word has length 286 [2022-07-20 21:04:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:41,582 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 755 transitions. [2022-07-20 21:04:41,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 95 states have (on average 2.473684210526316) internal successors, (235), 88 states have internal predecessors, (235), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-20 21:04:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 755 transitions. [2022-07-20 21:04:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-07-20 21:04:41,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:41,586 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:41,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:41,803 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,SelfDestructingSolverStorable12 [2022-07-20 21:04:41,803 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:41,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:41,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1396301985, now seen corresponding path program 1 times [2022-07-20 21:04:41,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:41,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760540543] [2022-07-20 21:04:41,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:41,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:43,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-20 21:04:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:44,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-20 21:04:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:44,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-07-20 21:04:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1244 proven. 3639 refuted. 0 times theorem prover too weak. 1383 trivial. 0 not checked. [2022-07-20 21:04:44,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:44,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760540543] [2022-07-20 21:04:44,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760540543] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:44,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649636392] [2022-07-20 21:04:44,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:44,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:44,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:44,916 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) [2022-07-20 21:04:44,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 21:04:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:45,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-20 21:04:45,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:45,834 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 11 [2022-07-20 21:04:45,933 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 17 treesize of output 13 [2022-07-20 21:04:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2491 proven. 1872 refuted. 0 times theorem prover too weak. 1903 trivial. 0 not checked. [2022-07-20 21:04:47,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:50,010 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-20 21:04:50,010 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 24 treesize of output 23 [2022-07-20 21:04:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2546 proven. 1815 refuted. 0 times theorem prover too weak. 1905 trivial. 0 not checked. [2022-07-20 21:04:50,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649636392] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:50,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:50,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 32, 30] total 105 [2022-07-20 21:04:50,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557020205] [2022-07-20 21:04:50,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:50,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-07-20 21:04:50,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:50,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-07-20 21:04:50,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=10541, Unknown=0, NotChecked=0, Total=10920 [2022-07-20 21:04:50,089 INFO L87 Difference]: Start difference. First operand 584 states and 755 transitions. Second operand has 105 states, 103 states have (on average 2.8155339805825244) internal successors, (290), 102 states have internal predecessors, (290), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-20 21:04:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:57,983 INFO L93 Difference]: Finished difference Result 2351 states and 3197 transitions. [2022-07-20 21:04:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-07-20 21:04:57,984 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 103 states have (on average 2.8155339805825244) internal successors, (290), 102 states have internal predecessors, (290), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 286 [2022-07-20 21:04:57,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:57,991 INFO L225 Difference]: With dead ends: 2351 [2022-07-20 21:04:57,992 INFO L226 Difference]: Without dead ends: 1732 [2022-07-20 21:04:57,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 600 SyntacticMatches, 5 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6037 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1296, Invalid=28116, Unknown=0, NotChecked=0, Total=29412 [2022-07-20 21:04:58,000 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 452 mSDsluCounter, 5396 mSDsCounter, 0 mSdLazyCounter, 6699 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 5491 SdHoareTripleChecker+Invalid, 11283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 6699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4453 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:58,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 5491 Invalid, 11283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 6699 Invalid, 0 Unknown, 4453 Unchecked, 3.1s Time] [2022-07-20 21:04:58,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2022-07-20 21:04:58,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1643. [2022-07-20 21:04:58,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1623 states have (on average 1.3351817621688231) internal successors, (2167), 1628 states have internal predecessors, (2167), 11 states have call successors, (11), 3 states have call predecessors, (11), 8 states have return successors, (68), 11 states have call predecessors, (68), 11 states have call successors, (68) [2022-07-20 21:04:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2246 transitions. [2022-07-20 21:04:58,079 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2246 transitions. Word has length 286 [2022-07-20 21:04:58,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:58,079 INFO L495 AbstractCegarLoop]: Abstraction has 1643 states and 2246 transitions. [2022-07-20 21:04:58,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 103 states have (on average 2.8155339805825244) internal successors, (290), 102 states have internal predecessors, (290), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-20 21:04:58,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2246 transitions. [2022-07-20 21:04:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-07-20 21:04:58,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:58,091 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:58,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:58,311 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,SelfDestructingSolverStorable13 [2022-07-20 21:04:58,311 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:58,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:58,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1818194917, now seen corresponding path program 2 times [2022-07-20 21:04:58,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:58,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679644549] [2022-07-20 21:04:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:58,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:00,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-20 21:05:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:01,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-20 21:05:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:01,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-07-20 21:05:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1246 proven. 4372 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-20 21:05:02,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:05:02,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679644549] [2022-07-20 21:05:02,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679644549] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:05:02,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022294763] [2022-07-20 21:05:02,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:05:02,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:05:02,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:05:02,257 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) [2022-07-20 21:05:02,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 21:05:02,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:05:02,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:05:02,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 277 conjunts are in the unsatisfiable core [2022-07-20 21:05:02,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:05:03,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:03,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:03,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:03,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 33 [2022-07-20 21:05:04,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:04,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:04,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:04,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:04,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:04,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:04,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:04,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:04,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:04,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:04,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:04,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:04,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:04,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:04,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:04,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:04,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:04,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:04,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:04,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:04,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:04,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:05,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:05,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:05,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:05,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:05,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:05,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:05,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:05,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:05,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:05,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:05,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:05,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:05,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:05,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 21:05:05,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:05,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:05,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:05:05,447 INFO L356 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-07-20 21:05:05,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 52 [2022-07-20 21:05:05,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:05:05,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:05,564 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:05:05,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 58 [2022-07-20 21:05:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 57 proven. 6205 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:05:08,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:05:37,997 INFO L356 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-07-20 21:05:38,011 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 38 treesize of output 31 [2022-07-20 21:05:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1337 proven. 3934 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2022-07-20 21:05:40,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022294763] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:05:40,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:05:40,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 110, 86] total 200 [2022-07-20 21:05:40,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942691785] [2022-07-20 21:05:40,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:05:40,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-07-20 21:05:40,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:05:40,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-07-20 21:05:40,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=39004, Unknown=16, NotChecked=0, Total=39800 [2022-07-20 21:05:40,365 INFO L87 Difference]: Start difference. First operand 1643 states and 2246 transitions. Second operand has 200 states, 200 states have (on average 2.36) internal successors, (472), 199 states have internal predecessors, (472), 6 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-20 21:05:55,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:05:55,035 INFO L93 Difference]: Finished difference Result 4382 states and 6067 transitions. [2022-07-20 21:05:55,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-07-20 21:05:55,036 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 2.36) internal successors, (472), 199 states have internal predecessors, (472), 6 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 286 [2022-07-20 21:05:55,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:05:55,054 INFO L225 Difference]: With dead ends: 4382 [2022-07-20 21:05:55,055 INFO L226 Difference]: Without dead ends: 4128 [2022-07-20 21:05:55,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 507 SyntacticMatches, 26 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20495 ImplicationChecksByTransitivity, 46.2s TimeCoverageRelationStatistics Valid=1672, Invalid=68802, Unknown=16, NotChecked=0, Total=70490 [2022-07-20 21:05:55,068 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 395 mSDsluCounter, 14198 mSDsCounter, 0 mSdLazyCounter, 10500 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 14331 SdHoareTripleChecker+Invalid, 25250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 10500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14657 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:05:55,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 14331 Invalid, 25250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 10500 Invalid, 0 Unknown, 14657 Unchecked, 4.7s Time] [2022-07-20 21:05:55,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2022-07-20 21:05:55,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 4002. [2022-07-20 21:05:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4002 states, 3963 states have (on average 1.341912692404744) internal successors, (5318), 3978 states have internal predecessors, (5318), 17 states have call successors, (17), 6 states have call predecessors, (17), 21 states have return successors, (199), 17 states have call predecessors, (199), 17 states have call successors, (199) [2022-07-20 21:05:55,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 5534 transitions. [2022-07-20 21:05:55,322 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 5534 transitions. Word has length 286 [2022-07-20 21:05:55,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:05:55,322 INFO L495 AbstractCegarLoop]: Abstraction has 4002 states and 5534 transitions. [2022-07-20 21:05:55,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 2.36) internal successors, (472), 199 states have internal predecessors, (472), 6 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-20 21:05:55,323 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 5534 transitions. [2022-07-20 21:05:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-07-20 21:05:55,344 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:05:55,344 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:05:55,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 21:05:55,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:05:55,559 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:05:55,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:05:55,560 INFO L85 PathProgramCache]: Analyzing trace with hash 938743263, now seen corresponding path program 3 times [2022-07-20 21:05:55,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:05:55,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654391166] [2022-07-20 21:05:55,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:05:55,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:05:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:57,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-20 21:05:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:57,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-20 21:05:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:58,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-07-20 21:05:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2490 proven. 3130 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2022-07-20 21:05:59,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:05:59,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654391166] [2022-07-20 21:05:59,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654391166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:05:59,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671565420] [2022-07-20 21:05:59,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:05:59,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:05:59,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:05:59,152 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) [2022-07-20 21:05:59,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 21:06:20,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2022-07-20 21:06:20,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:06:20,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 198 conjunts are in the unsatisfiable core [2022-07-20 21:06:20,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:06:21,547 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:06:21,549 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 39 treesize of output 32 [2022-07-20 21:06:21,632 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:06:21,633 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 39 treesize of output 32 [2022-07-20 21:06:21,710 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:06:21,711 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 39 treesize of output 32 [2022-07-20 21:06:21,799 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:06:21,800 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 39 treesize of output 32 [2022-07-20 21:06:21,881 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:06:21,881 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 39 treesize of output 32 [2022-07-20 21:06:21,966 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:06:21,966 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 39 treesize of output 32 [2022-07-20 21:06:22,048 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:06:22,048 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 39 treesize of output 32 [2022-07-20 21:06:22,132 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:06:22,132 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 39 treesize of output 32 [2022-07-20 21:06:22,218 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:06:22,219 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 39 treesize of output 32 [2022-07-20 21:06:22,311 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:06:22,312 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 39 treesize of output 32 [2022-07-20 21:06:22,327 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-20 21:06:22,327 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 39 treesize of output 38 [2022-07-20 21:06:22,481 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-20 21:06:22,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2022-07-20 21:06:22,618 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-20 21:06:22,618 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 41 treesize of output 40 [2022-07-20 21:06:22,650 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-20 21:06:22,651 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 41 treesize of output 40 [2022-07-20 21:06:22,683 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-20 21:06:22,683 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 41 treesize of output 40 [2022-07-20 21:06:22,715 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-20 21:06:22,715 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 41 treesize of output 40 [2022-07-20 21:06:22,773 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-20 21:06:22,773 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 41 treesize of output 40 [2022-07-20 21:06:22,962 INFO L356 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2022-07-20 21:06:22,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 52 [2022-07-20 21:06:23,187 INFO L356 Elim1Store]: treesize reduction 99, result has 27.7 percent of original size [2022-07-20 21:06:23,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 67 [2022-07-20 21:06:23,485 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:06:23,485 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 35 treesize of output 28 [2022-07-20 21:07:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2284 proven. 2537 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2022-07-20 21:07:05,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:07:38,381 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_181| Int)) (or (not (<= |v_ULTIMATE.start_main_~i~2#1_181| (+ |c_ULTIMATE.start_main_~i~2#1| 1))) (forall ((v_ArrVal_1562 Int) (v_ArrVal_1559 Int)) (<= 0 (let ((.cse0 (select (let ((.cse1 (* |v_ULTIMATE.start_main_~i~2#1_181| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_1559) (+ .cse1 |c_ULTIMATE.start_main_~#x~0#1.offset| 4) v_ArrVal_1562)) (+ 72 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (+ .cse0 (* (div (* .cse0 (- 1)) 2) 2))))))) is different from false [2022-07-20 21:08:06,800 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_182| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~2#1_181| Int) (v_ArrVal_1562 Int) (v_ArrVal_1557 Int) (v_ArrVal_1559 Int)) (or (not (<= |v_ULTIMATE.start_main_~i~2#1_181| (+ |v_ULTIMATE.start_main_~i~2#1_182| 1))) (<= 0 (let ((.cse0 (select (let ((.cse1 (* |v_ULTIMATE.start_main_~i~2#1_181| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~2#1_182| 4) |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_1557) (+ .cse1 |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_1559) (+ .cse1 |c_ULTIMATE.start_main_~#x~0#1.offset| 4) v_ArrVal_1562)) (+ 72 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (+ .cse0 (* (div (* (- 1) .cse0) 2) 2)))))) (not (<= |v_ULTIMATE.start_main_~i~2#1_182| (+ |c_ULTIMATE.start_main_~i~2#1| 1))))) is different from false