./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/max05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/max05-1.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 4e48915cf0eaefe43320bbe59bf88f5c68b2f305d293e808fa6ece9112b5c238 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 22:18:04,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:18:04,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:18:04,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:18:04,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:18:04,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:18:04,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:18:04,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:18:04,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:18:04,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:18:04,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:18:04,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:18:04,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:18:04,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:18:04,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:18:04,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:18:04,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:18:04,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:18:04,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:18:04,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:18:04,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:18:04,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:18:04,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:18:04,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:18:04,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:18:04,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:18:04,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:18:04,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:18:04,244 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:18:04,245 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:18:04,245 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:18:04,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:18:04,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:18:04,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:18:04,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:18:04,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:18:04,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:18:04,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:18:04,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:18:04,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:18:04,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:18:04,251 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:18:04,269 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:18:04,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:18:04,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:18:04,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:18:04,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:18:04,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:18:04,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:18:04,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:18:04,271 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:18:04,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:18:04,272 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:18:04,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:18:04,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:18:04,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:18:04,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:18:04,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:18:04,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:18:04,273 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:18:04,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:18:04,273 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:18:04,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:18:04,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:18:04,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:18:04,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:18:04,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:18:04,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:18:04,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:18:04,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:18:04,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:18:04,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:18:04,275 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:18:04,275 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:18:04,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:18:04,276 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:18:04,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e48915cf0eaefe43320bbe59bf88f5c68b2f305d293e808fa6ece9112b5c238 [2021-12-16 22:18:04,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:18:04,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:18:04,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:18:04,499 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:18:04,515 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:18:04,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/max05-1.i [2021-12-16 22:18:04,567 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91f580530/c95f8dbabe694a2fb84ca260435e6bd0/FLAG75549ac1a [2021-12-16 22:18:04,907 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:18:04,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max05-1.i [2021-12-16 22:18:04,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91f580530/c95f8dbabe694a2fb84ca260435e6bd0/FLAG75549ac1a [2021-12-16 22:18:05,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91f580530/c95f8dbabe694a2fb84ca260435e6bd0 [2021-12-16 22:18:05,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:18:05,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:18:05,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:18:05,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:18:05,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:18:05,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:18:05" (1/1) ... [2021-12-16 22:18:05,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3c82d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:18:05, skipping insertion in model container [2021-12-16 22:18:05,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:18:05" (1/1) ... [2021-12-16 22:18:05,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:18:05,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:18:05,581 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/max05-1.i[1284,1297] [2021-12-16 22:18:05,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:18:05,596 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:18:05,624 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/max05-1.i[1284,1297] [2021-12-16 22:18:05,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:18:05,639 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:18:05,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:18:05 WrapperNode [2021-12-16 22:18:05,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:18:05,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:18:05,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:18:05,644 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:18:05,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:18:05" (1/1) ... [2021-12-16 22:18:05,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:18:05" (1/1) ... [2021-12-16 22:18:05,676 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-12-16 22:18:05,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:18:05,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:18:05,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:18:05,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:18:05,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:18:05" (1/1) ... [2021-12-16 22:18:05,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:18:05" (1/1) ... [2021-12-16 22:18:05,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:18:05" (1/1) ... [2021-12-16 22:18:05,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:18:05" (1/1) ... [2021-12-16 22:18:05,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:18:05" (1/1) ... [2021-12-16 22:18:05,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:18:05" (1/1) ... [2021-12-16 22:18:05,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:18:05" (1/1) ... [2021-12-16 22:18:05,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:18:05,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:18:05,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:18:05,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:18:05,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:18:05" (1/1) ... [2021-12-16 22:18:05,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:18:05,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:05,769 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 22:18:05,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 22:18:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:18:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure max [2021-12-16 22:18:05,840 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2021-12-16 22:18:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:18:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 22:18:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:18:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:18:05,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:18:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:18:05,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 22:18:05,905 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:18:05,906 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:18:06,051 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:18:06,055 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:18:06,056 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 22:18:06,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:18:06 BoogieIcfgContainer [2021-12-16 22:18:06,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:18:06,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:18:06,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:18:06,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:18:06,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:18:05" (1/3) ... [2021-12-16 22:18:06,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147a9d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:18:06, skipping insertion in model container [2021-12-16 22:18:06,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:18:05" (2/3) ... [2021-12-16 22:18:06,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147a9d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:18:06, skipping insertion in model container [2021-12-16 22:18:06,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:18:06" (3/3) ... [2021-12-16 22:18:06,076 INFO L111 eAbstractionObserver]: Analyzing ICFG max05-1.i [2021-12-16 22:18:06,079 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:18:06,080 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:18:06,121 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:18:06,128 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 22:18:06,128 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:18:06,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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) [2021-12-16 22:18:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 22:18:06,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:06,149 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:06,150 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:06,154 INFO L85 PathProgramCache]: Analyzing trace with hash -528134526, now seen corresponding path program 1 times [2021-12-16 22:18:06,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:06,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261453688] [2021-12-16 22:18:06,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:06,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:06,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:18:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:06,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 22:18:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:06,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:18:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:18:06,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:06,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261453688] [2021-12-16 22:18:06,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261453688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:18:06,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:18:06,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 22:18:06,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478649414] [2021-12-16 22:18:06,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:18:06,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 22:18:06,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:06,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 22:18:06,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 22:18:06,368 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 2 states, 2 states have (on average 7.0) internal successors, (14), 2 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) [2021-12-16 22:18:06,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:06,384 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-12-16 22:18:06,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 22:18:06,387 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 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 [2021-12-16 22:18:06,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:06,391 INFO L225 Difference]: With dead ends: 52 [2021-12-16 22:18:06,392 INFO L226 Difference]: Without dead ends: 24 [2021-12-16 22:18:06,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 22:18:06,398 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:06,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:18:06,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-16 22:18:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-16 22:18:06,425 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) [2021-12-16 22:18:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-12-16 22:18:06,427 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2021-12-16 22:18:06,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:06,427 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-12-16 22:18:06,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 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) [2021-12-16 22:18:06,428 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-12-16 22:18:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 22:18:06,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:06,430 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:06,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 22:18:06,431 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:06,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:06,432 INFO L85 PathProgramCache]: Analyzing trace with hash -321958693, now seen corresponding path program 1 times [2021-12-16 22:18:06,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:06,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20861772] [2021-12-16 22:18:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:06,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:06,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:18:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:06,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 22:18:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:06,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:18:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 22:18:06,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:06,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20861772] [2021-12-16 22:18:06,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20861772] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:06,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237049632] [2021-12-16 22:18:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:06,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:06,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:06,559 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:06,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 22:18:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:06,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 22:18:06,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:18:06,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:18:06,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237049632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:18:06,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:18:06,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-16 22:18:06,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461353219] [2021-12-16 22:18:06,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:18:06,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:18:06,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:06,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:18:06,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:18:06,762 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. 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) [2021-12-16 22:18:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:06,785 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-12-16 22:18:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:18:06,786 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 [2021-12-16 22:18:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:06,787 INFO L225 Difference]: With dead ends: 46 [2021-12-16 22:18:06,787 INFO L226 Difference]: Without dead ends: 26 [2021-12-16 22:18:06,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:18:06,788 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 52 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 [2021-12-16 22:18:06,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 52 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:18:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-16 22:18:06,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-12-16 22:18:06,792 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) [2021-12-16 22:18:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-12-16 22:18:06,796 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 28 [2021-12-16 22:18:06,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:06,797 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-12-16 22:18:06,797 INFO L471 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) [2021-12-16 22:18:06,797 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-12-16 22:18:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 22:18:06,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:06,798 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:06,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 22:18:07,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:07,018 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:07,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:07,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1777476163, now seen corresponding path program 1 times [2021-12-16 22:18:07,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:07,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791690806] [2021-12-16 22:18:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:07,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:07,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 22:18:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:07,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 22:18:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:07,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:18:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:18:07,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:07,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791690806] [2021-12-16 22:18:07,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791690806] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:07,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357454074] [2021-12-16 22:18:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:07,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:07,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:07,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:07,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 22:18:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:07,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 22:18:07,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 22:18:07,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:18:07,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357454074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:18:07,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:18:07,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-16 22:18:07,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747306605] [2021-12-16 22:18:07,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:18:07,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:18:07,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:07,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:18:07,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:18:07,185 INFO L87 Difference]: Start difference. First operand 25 states and 30 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) [2021-12-16 22:18:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:07,194 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-12-16 22:18:07,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:18:07,195 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 [2021-12-16 22:18:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:07,195 INFO L225 Difference]: With dead ends: 48 [2021-12-16 22:18:07,195 INFO L226 Difference]: Without dead ends: 29 [2021-12-16 22:18:07,196 INFO L932 BasicCegarLoop]: 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 [2021-12-16 22:18:07,196 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:07,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:18:07,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-16 22:18:07,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-12-16 22:18:07,200 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) [2021-12-16 22:18:07,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-12-16 22:18:07,200 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 30 [2021-12-16 22:18:07,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:07,201 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-12-16 22:18:07,201 INFO L471 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) [2021-12-16 22:18:07,201 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-12-16 22:18:07,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 22:18:07,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:07,202 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-16 22:18:07,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 22:18:07,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-16 22:18:07,421 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:07,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:07,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1540631384, now seen corresponding path program 1 times [2021-12-16 22:18:07,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:07,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004527144] [2021-12-16 22:18:07,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:07,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:07,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 22:18:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:07,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 22:18:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:07,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 22:18:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:18:07,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:07,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004527144] [2021-12-16 22:18:07,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004527144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:07,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216057115] [2021-12-16 22:18:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:07,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:07,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:07,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:07,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 22:18:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:07,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 22:18:07,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:18:07,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:18:07,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216057115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:18:07,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:18:07,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-16 22:18:07,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888993137] [2021-12-16 22:18:07,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:18:07,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:18:07,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:07,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:18:07,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:18:07,652 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-12-16 22:18:07,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:07,659 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-12-16 22:18:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:18:07,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 42 [2021-12-16 22:18:07,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:07,660 INFO L225 Difference]: With dead ends: 43 [2021-12-16 22:18:07,660 INFO L226 Difference]: Without dead ends: 28 [2021-12-16 22:18:07,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:18:07,661 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 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 [2021-12-16 22:18:07,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:18:07,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-16 22:18:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-16 22:18:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2021-12-16 22:18:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-12-16 22:18:07,665 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 42 [2021-12-16 22:18:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:07,666 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-12-16 22:18:07,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-12-16 22:18:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-12-16 22:18:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 22:18:07,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:07,667 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-16 22:18:07,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 22:18:07,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:07,881 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:07,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:07,881 INFO L85 PathProgramCache]: Analyzing trace with hash -180199466, now seen corresponding path program 1 times [2021-12-16 22:18:07,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:07,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992825836] [2021-12-16 22:18:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:07,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:07,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 22:18:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:07,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 22:18:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:07,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:18:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 22:18:07,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:07,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992825836] [2021-12-16 22:18:07,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992825836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:07,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453754505] [2021-12-16 22:18:07,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:07,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:07,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:07,935 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:07,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 22:18:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:08,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 22:18:08,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 22:18:08,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 22:18:08,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453754505] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:08,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:08,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-16 22:18:08,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272806597] [2021-12-16 22:18:08,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:08,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 22:18:08,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:08,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 22:18:08,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:18:08,137 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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) [2021-12-16 22:18:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:08,162 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2021-12-16 22:18:08,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 22:18:08,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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 44 [2021-12-16 22:18:08,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:08,163 INFO L225 Difference]: With dead ends: 62 [2021-12-16 22:18:08,163 INFO L226 Difference]: Without dead ends: 40 [2021-12-16 22:18:08,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:18:08,164 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:08,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 70 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:18:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-16 22:18:08,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-12-16 22:18:08,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 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) [2021-12-16 22:18:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-12-16 22:18:08,168 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 44 [2021-12-16 22:18:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:08,169 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-12-16 22:18:08,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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) [2021-12-16 22:18:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-12-16 22:18:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-16 22:18:08,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:08,170 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-12-16 22:18:08,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 22:18:08,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:08,402 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:08,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:08,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1875433, now seen corresponding path program 2 times [2021-12-16 22:18:08,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:08,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545080508] [2021-12-16 22:18:08,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:08,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:08,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 22:18:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:08,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 22:18:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:08,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:18:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-16 22:18:08,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:08,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545080508] [2021-12-16 22:18:08,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545080508] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:08,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974249356] [2021-12-16 22:18:08,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:18:08,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:08,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:08,481 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:08,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 22:18:08,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:18:08,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:18:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 22:18:08,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-16 22:18:08,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-16 22:18:08,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974249356] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:08,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:08,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2021-12-16 22:18:08,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685198177] [2021-12-16 22:18:08,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:08,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 22:18:08,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:08,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 22:18:08,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:18:08,734 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 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) [2021-12-16 22:18:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:08,772 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2021-12-16 22:18:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 22:18:08,772 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 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 62 [2021-12-16 22:18:08,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:08,773 INFO L225 Difference]: With dead ends: 68 [2021-12-16 22:18:08,773 INFO L226 Difference]: Without dead ends: 42 [2021-12-16 22:18:08,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:18:08,774 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:08,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 93 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:18:08,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-16 22:18:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-16 22:18:08,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 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) [2021-12-16 22:18:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-16 22:18:08,778 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 62 [2021-12-16 22:18:08,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:08,778 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-16 22:18:08,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 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) [2021-12-16 22:18:08,779 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-16 22:18:08,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 22:18:08,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:08,779 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:08,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 22:18:08,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:08,998 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:08,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:08,998 INFO L85 PathProgramCache]: Analyzing trace with hash -50192777, now seen corresponding path program 3 times [2021-12-16 22:18:08,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:08,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119009067] [2021-12-16 22:18:08,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:08,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:09,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:18:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:09,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 22:18:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:09,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 22:18:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-16 22:18:09,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:09,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119009067] [2021-12-16 22:18:09,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119009067] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:09,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328378800] [2021-12-16 22:18:09,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:18:09,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:09,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:09,060 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:18:09,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 22:18:09,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 22:18:09,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:18:09,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 22:18:09,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-16 22:18:09,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-16 22:18:09,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328378800] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:09,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:09,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-16 22:18:09,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49296721] [2021-12-16 22:18:09,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:09,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 22:18:09,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:09,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 22:18:09,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:18:09,259 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:18:09,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:09,276 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2021-12-16 22:18:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 22:18:09,277 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 1 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 66 [2021-12-16 22:18:09,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:09,277 INFO L225 Difference]: With dead ends: 80 [2021-12-16 22:18:09,277 INFO L226 Difference]: Without dead ends: 53 [2021-12-16 22:18:09,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:18:09,278 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:09,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 122 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:18:09,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-16 22:18:09,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-16 22:18:09,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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) [2021-12-16 22:18:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-12-16 22:18:09,283 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 66 [2021-12-16 22:18:09,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:09,283 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-12-16 22:18:09,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:18:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-12-16 22:18:09,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-16 22:18:09,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:09,284 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:09,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 22:18:09,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:09,501 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:09,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:09,501 INFO L85 PathProgramCache]: Analyzing trace with hash -135945016, now seen corresponding path program 4 times [2021-12-16 22:18:09,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:09,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241152771] [2021-12-16 22:18:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:09,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:09,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:18:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:09,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 22:18:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:09,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 22:18:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-12-16 22:18:09,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:09,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241152771] [2021-12-16 22:18:09,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241152771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:09,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481892439] [2021-12-16 22:18:09,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:18:09,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:09,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:09,580 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) [2021-12-16 22:18:09,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 22:18:09,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:18:09,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:18:09,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 22:18:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 230 proven. 4 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-16 22:18:09,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-12-16 22:18:09,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481892439] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:09,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:09,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-16 22:18:09,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857915976] [2021-12-16 22:18:09,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:09,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 22:18:09,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:09,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 22:18:09,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:18:09,887 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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) [2021-12-16 22:18:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:09,918 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-12-16 22:18:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 22:18:09,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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 102 [2021-12-16 22:18:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:09,919 INFO L225 Difference]: With dead ends: 88 [2021-12-16 22:18:09,919 INFO L226 Difference]: Without dead ends: 57 [2021-12-16 22:18:09,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:18:09,920 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:09,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:18:09,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-16 22:18:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-16 22:18:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 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) [2021-12-16 22:18:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-12-16 22:18:09,924 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 102 [2021-12-16 22:18:09,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:09,926 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-12-16 22:18:09,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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) [2021-12-16 22:18:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-12-16 22:18:09,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-16 22:18:09,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:09,931 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:09,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 22:18:10,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:10,132 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:10,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:10,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1996885060, now seen corresponding path program 5 times [2021-12-16 22:18:10,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:10,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254415129] [2021-12-16 22:18:10,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:10,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:10,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:18:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:10,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 22:18:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:10,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 22:18:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 13 proven. 379 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-12-16 22:18:10,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:10,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254415129] [2021-12-16 22:18:10,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254415129] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:10,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865782665] [2021-12-16 22:18:10,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:18:10,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:10,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:10,708 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) [2021-12-16 22:18:10,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 22:18:10,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-16 22:18:10,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:18:10,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-16 22:18:10,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:11,055 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-16 22:18:11,056 INFO L388 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 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-16 22:18:12,077 INFO L354 Elim1Store]: treesize reduction 340, result has 12.4 percent of original size [2021-12-16 22:18:12,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 74 [2021-12-16 22:18:12,220 INFO L354 Elim1Store]: treesize reduction 270, result has 11.8 percent of original size [2021-12-16 22:18:12,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 59 [2021-12-16 22:18:12,349 INFO L354 Elim1Store]: treesize reduction 178, result has 11.9 percent of original size [2021-12-16 22:18:12,350 INFO L388 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 6 case distinctions, treesize of input 71 treesize of output 46 [2021-12-16 22:18:12,470 INFO L354 Elim1Store]: treesize reduction 151, result has 12.2 percent of original size [2021-12-16 22:18:12,471 INFO L388 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 6 case distinctions, treesize of input 57 treesize of output 41 [2021-12-16 22:18:12,564 INFO L354 Elim1Store]: treesize reduction 106, result has 10.9 percent of original size [2021-12-16 22:18:12,565 INFO L388 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 42 treesize of output 30 [2021-12-16 22:18:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 258 proven. 213 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-16 22:18:57,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:57,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865782665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:57,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:18:57,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 43] total 53 [2021-12-16 22:18:57,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512101550] [2021-12-16 22:18:57,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:57,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-16 22:18:57,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:57,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-16 22:18:57,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2656, Unknown=21, NotChecked=0, Total=2862 [2021-12-16 22:18:57,626 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 53 states, 51 states have (on average 2.196078431372549) internal successors, (112), 50 states have internal predecessors, (112), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 22:20:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:20:54,857 INFO L93 Difference]: Finished difference Result 212 states and 259 transitions. [2021-12-16 22:20:54,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-16 22:20:54,858 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 2.196078431372549) internal successors, (112), 50 states have internal predecessors, (112), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 106 [2021-12-16 22:20:54,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:20:54,860 INFO L225 Difference]: With dead ends: 212 [2021-12-16 22:20:54,860 INFO L226 Difference]: Without dead ends: 153 [2021-12-16 22:20:54,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 86 SyntacticMatches, 14 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 162.5s TimeCoverageRelationStatistics Valid=772, Invalid=9294, Unknown=34, NotChecked=0, Total=10100 [2021-12-16 22:20:54,864 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 54 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1352 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:20:54,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 542 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 622 Invalid, 0 Unknown, 1352 Unchecked, 0.3s Time] [2021-12-16 22:20:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-16 22:20:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 138. [2021-12-16 22:20:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 129 states have (on average 1.2015503875968991) internal successors, (155), 130 states have internal predecessors, (155), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-16 22:20:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 172 transitions. [2021-12-16 22:20:54,902 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 172 transitions. Word has length 106 [2021-12-16 22:20:54,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:20:54,902 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 172 transitions. [2021-12-16 22:20:54,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 2.196078431372549) internal successors, (112), 50 states have internal predecessors, (112), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 22:20:54,903 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 172 transitions. [2021-12-16 22:20:54,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-16 22:20:54,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:20:54,906 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:20:54,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 22:20:55,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-16 22:20:55,109 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:20:55,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:20:55,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1737382458, now seen corresponding path program 1 times [2021-12-16 22:20:55,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:20:55,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869919191] [2021-12-16 22:20:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:20:55,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:20:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:20:55,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:20:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:20:55,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 22:20:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:20:55,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 22:20:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:20:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 114 proven. 347 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-16 22:20:56,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:20:56,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869919191] [2021-12-16 22:20:56,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869919191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:20:56,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415821343] [2021-12-16 22:20:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:20:56,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:20:56,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:20:56,191 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) [2021-12-16 22:20:56,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 22:20:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:20:56,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-16 22:20:56,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:20:56,369 INFO L388 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 6 treesize of output 5 [2021-12-16 22:20:57,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 22:20:57,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 22:20:57,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:20:57,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 81 [2021-12-16 22:20:57,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:20:57,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 56 [2021-12-16 22:20:57,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 22:20:57,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:20:57,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 56 [2021-12-16 22:20:57,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 22:20:57,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 22:20:57,835 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-16 22:20:57,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 53 [2021-12-16 22:20:57,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 22:20:57,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:20:57,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:20:57,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 44 [2021-12-16 22:20:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 232 proven. 242 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-16 22:20:58,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:21:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-16 22:21:11,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415821343] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:21:11,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:21:11,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 42, 37] total 106 [2021-12-16 22:21:11,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171745126] [2021-12-16 22:21:11,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:21:11,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-12-16 22:21:11,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:21:11,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-12-16 22:21:11,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=10611, Unknown=5, NotChecked=0, Total=11130 [2021-12-16 22:21:11,835 INFO L87 Difference]: Start difference. First operand 138 states and 172 transitions. Second operand has 106 states, 103 states have (on average 1.9320388349514563) internal successors, (199), 102 states have internal predecessors, (199), 6 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-16 22:21:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:21:57,335 INFO L93 Difference]: Finished difference Result 686 states and 1029 transitions. [2021-12-16 22:21:57,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 265 states. [2021-12-16 22:21:57,335 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 103 states have (on average 1.9320388349514563) internal successors, (199), 102 states have internal predecessors, (199), 6 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 106 [2021-12-16 22:21:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:21:57,345 INFO L225 Difference]: With dead ends: 686 [2021-12-16 22:21:57,345 INFO L226 Difference]: Without dead ends: 581 [2021-12-16 22:21:57,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 194 SyntacticMatches, 8 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38319 ImplicationChecksByTransitivity, 57.9s TimeCoverageRelationStatistics Valid=6524, Invalid=107368, Unknown=14, NotChecked=0, Total=113906 [2021-12-16 22:21:57,363 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 466 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 2429 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 12597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10082 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:21:57,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 1742 Invalid, 12597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2429 Invalid, 0 Unknown, 10082 Unchecked, 1.3s Time] [2021-12-16 22:21:57,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-12-16 22:21:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 453. [2021-12-16 22:21:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 427 states have (on average 1.243559718969555) internal successors, (531), 437 states have internal predecessors, (531), 11 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (115), 12 states have call predecessors, (115), 11 states have call successors, (115) [2021-12-16 22:21:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 657 transitions. [2021-12-16 22:21:57,428 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 657 transitions. Word has length 106 [2021-12-16 22:21:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:21:57,428 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 657 transitions. [2021-12-16 22:21:57,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 103 states have (on average 1.9320388349514563) internal successors, (199), 102 states have internal predecessors, (199), 6 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-16 22:21:57,429 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 657 transitions. [2021-12-16 22:21:57,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-16 22:21:57,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:21:57,433 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:21:57,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 22:21:57,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 22:21:57,651 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:21:57,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:21:57,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2130409468, now seen corresponding path program 2 times [2021-12-16 22:21:57,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:21:57,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502957512] [2021-12-16 22:21:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:21:57,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:21:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:21:58,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:21:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:21:58,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 22:21:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:21:59,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 22:21:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:21:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 3 proven. 502 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 22:21:59,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:21:59,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502957512] [2021-12-16 22:21:59,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502957512] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:21:59,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565083292] [2021-12-16 22:21:59,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:21:59,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:21:59,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:21:59,970 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) [2021-12-16 22:22:00,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 22:22:00,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:22:00,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:22:00,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 153 conjunts are in the unsatisfiable core [2021-12-16 22:22:00,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:22:00,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:23:06,347 INFO L354 Elim1Store]: treesize reduction 294, result has 10.6 percent of original size [2021-12-16 22:23:06,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 67 [2021-12-16 22:23:08,125 INFO L354 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2021-12-16 22:23:08,125 INFO L388 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 6 case distinctions, treesize of input 86 treesize of output 61 [2021-12-16 22:23:08,383 INFO L354 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2021-12-16 22:23:08,383 INFO L388 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 6 case distinctions, treesize of input 86 treesize of output 61 [2021-12-16 22:23:08,546 INFO L354 Elim1Store]: treesize reduction 135, result has 12.3 percent of original size [2021-12-16 22:23:08,546 INFO L388 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 6 case distinctions, treesize of input 86 treesize of output 52 [2021-12-16 22:23:08,788 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-12-16 22:23:08,789 INFO L388 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 2 case distinctions, treesize of input 75 treesize of output 38 [2021-12-16 22:23:08,958 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-12-16 22:23:08,959 INFO L388 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 2 case distinctions, treesize of input 69 treesize of output 38 [2021-12-16 22:24:20,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:24:20,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 64 [2021-12-16 22:24:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 1 proven. 516 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:24:21,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:24:50,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565083292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:24:50,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:24:50,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 59] total 115 [2021-12-16 22:24:50,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346291055] [2021-12-16 22:24:50,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:24:50,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-12-16 22:24:50,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:24:50,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-12-16 22:24:50,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=16623, Unknown=68, NotChecked=0, Total=17292 [2021-12-16 22:24:50,887 INFO L87 Difference]: Start difference. First operand 453 states and 657 transitions. Second operand has 115 states, 112 states have (on average 1.6428571428571428) internal successors, (184), 106 states have internal predecessors, (184), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-16 22:27:30,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:27:30,723 INFO L93 Difference]: Finished difference Result 662 states and 974 transitions. [2021-12-16 22:27:30,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-12-16 22:27:30,723 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 112 states have (on average 1.6428571428571428) internal successors, (184), 106 states have internal predecessors, (184), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 106 [2021-12-16 22:27:30,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:27:30,727 INFO L225 Difference]: With dead ends: 662 [2021-12-16 22:27:30,727 INFO L226 Difference]: Without dead ends: 653 [2021-12-16 22:27:30,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11436 ImplicationChecksByTransitivity, 328.5s TimeCoverageRelationStatistics Valid=1199, Invalid=33447, Unknown=136, NotChecked=0, Total=34782 [2021-12-16 22:27:30,729 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 849 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 22:27:30,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 828 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1284 Invalid, 0 Unknown, 849 Unchecked, 0.8s Time] [2021-12-16 22:27:30,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-12-16 22:27:30,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 631. [2021-12-16 22:27:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 595 states have (on average 1.2369747899159664) internal successors, (736), 609 states have internal predecessors, (736), 16 states have call successors, (16), 7 states have call predecessors, (16), 19 states have return successors, (184), 14 states have call predecessors, (184), 16 states have call successors, (184) [2021-12-16 22:27:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 936 transitions. [2021-12-16 22:27:30,759 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 936 transitions. Word has length 106 [2021-12-16 22:27:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:27:30,759 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 936 transitions. [2021-12-16 22:27:30,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 112 states have (on average 1.6428571428571428) internal successors, (184), 106 states have internal predecessors, (184), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-16 22:27:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 936 transitions. [2021-12-16 22:27:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-16 22:27:30,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:27:30,764 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 12, 5, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:27:30,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 22:27:30,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 22:27:30,978 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:27:30,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:27:30,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1153440578, now seen corresponding path program 3 times [2021-12-16 22:27:30,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:27:30,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430915908] [2021-12-16 22:27:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:27:30,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:27:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:27:31,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:27:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:27:31,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 22:27:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:27:31,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 22:27:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:27:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 119 proven. 345 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-16 22:27:32,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:27:32,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430915908] [2021-12-16 22:27:32,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430915908] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:27:32,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089150125] [2021-12-16 22:27:32,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:27:32,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:27:32,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:27:32,053 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) [2021-12-16 22:27:32,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 22:27:32,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-16 22:27:32,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:27:32,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-16 22:27:32,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:27:32,273 INFO L388 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 6 treesize of output 5 [2021-12-16 22:27:34,523 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-12-16 22:27:34,523 INFO L388 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 33 treesize of output 35 [2021-12-16 22:27:34,571 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-12-16 22:27:34,571 INFO L388 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 31 treesize of output 33 [2021-12-16 22:27:34,605 INFO L354 Elim1Store]: treesize reduction 129, result has 25.0 percent of original size [2021-12-16 22:27:34,609 INFO L388 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 6 case distinctions, treesize of input 45 treesize of output 62 [2021-12-16 22:27:34,790 INFO L354 Elim1Store]: treesize reduction 274, result has 17.7 percent of original size [2021-12-16 22:27:34,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 76 treesize of output 92 [2021-12-16 22:27:38,911 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-12-16 22:27:38,911 INFO L388 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 46 treesize of output 36 [2021-12-16 22:28:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 302 proven. 131 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-16 22:28:49,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:28:55,123 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~2#1| Int)) (or (< |ULTIMATE.start_main_~i~2#1| 2) (forall ((v_ArrVal_444 Int) (v_ArrVal_442 Int)) (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|)) (.cse1 (* |ULTIMATE.start_main_~i~2#1| 4))) (let ((.cse0 (store .cse2 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse1) v_ArrVal_442)) (.cse3 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse1 4))) (or (< v_ArrVal_444 (select .cse0 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse1 8))) (< (select .cse2 .cse3) v_ArrVal_442) (let ((.cse4 (store .cse0 .cse3 v_ArrVal_444))) (<= (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| 8)) 1) (select .cse4 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| 12)))))))) (<= 3 |ULTIMATE.start_main_~i~2#1|))) is different from false [2021-12-16 22:28:56,336 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_43| Int) (v_ArrVal_444 Int) (v_ArrVal_442 Int) (v_ArrVal_440 Int)) (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| (* |c_ULTIMATE.start_main_~i~2#1| 4)) v_ArrVal_440)) (.cse1 (* |v_ULTIMATE.start_main_~i~2#1_43| 4))) (let ((.cse0 (store .cse2 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse1) v_ArrVal_442)) (.cse3 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse1 4))) (or (<= 3 |v_ULTIMATE.start_main_~i~2#1_43|) (< v_ArrVal_444 (select .cse0 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse1 8))) (< (select .cse2 .cse3) v_ArrVal_442) (let ((.cse4 (store .cse0 .cse3 v_ArrVal_444))) (<= (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| 8)) 1) (select .cse4 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| 12)))) (< |v_ULTIMATE.start_main_~i~2#1_43| 2))))) is different from false [2021-12-16 22:28:57,526 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_43| Int) (v_ArrVal_444 Int) (v_ArrVal_442 Int) (v_ArrVal_440 Int)) (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| (* |c_ULTIMATE.start_main_~i~2#1| 4) 4) v_ArrVal_440)) (.cse1 (* |v_ULTIMATE.start_main_~i~2#1_43| 4))) (let ((.cse0 (store .cse2 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse1) v_ArrVal_442)) (.cse3 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse1 4))) (or (<= 3 |v_ULTIMATE.start_main_~i~2#1_43|) (< v_ArrVal_444 (select .cse0 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse1 8))) (< (select .cse2 .cse3) v_ArrVal_442) (let ((.cse4 (store .cse0 .cse3 v_ArrVal_444))) (<= (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| 8)) 1) (select .cse4 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| 12)))) (< |v_ULTIMATE.start_main_~i~2#1_43| 2))))) is different from false [2021-12-16 22:28:58,869 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_43| Int) (v_ArrVal_444 Int) (v_ArrVal_442 Int) (v_ArrVal_440 Int) (v_ArrVal_439 Int)) (let ((.cse0 (let ((.cse5 (* |c_ULTIMATE.start_main_~i~2#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse5) v_ArrVal_439) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse5 4) v_ArrVal_440))) (.cse4 (* |v_ULTIMATE.start_main_~i~2#1_43| 4))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse4 4)) (.cse3 (store .cse0 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse4) v_ArrVal_442))) (or (<= 3 |v_ULTIMATE.start_main_~i~2#1_43|) (< (select .cse0 .cse1) v_ArrVal_442) (let ((.cse2 (store .cse3 .cse1 v_ArrVal_444))) (<= (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| 8)) 1) (select .cse2 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| 12)))) (< v_ArrVal_444 (select .cse3 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse4 8))) (< |v_ULTIMATE.start_main_~i~2#1_43| 2))))) is different from false [2021-12-16 22:29:00,175 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_43| Int) (v_ArrVal_444 Int) (v_ArrVal_442 Int) (v_ArrVal_440 Int) (v_ArrVal_439 Int)) (let ((.cse2 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) |c_ULTIMATE.start_main_~#x~0#1.offset| v_ArrVal_439) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| 4) v_ArrVal_440)) (.cse1 (* |v_ULTIMATE.start_main_~i~2#1_43| 4))) (let ((.cse0 (store .cse2 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse1) v_ArrVal_442)) (.cse3 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse1 4))) (or (<= 3 |v_ULTIMATE.start_main_~i~2#1_43|) (< v_ArrVal_444 (select .cse0 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| .cse1 8))) (< (select .cse2 .cse3) v_ArrVal_442) (let ((.cse4 (store .cse0 .cse3 v_ArrVal_444))) (<= (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| 8)) 1) (select .cse4 (+ |c_ULTIMATE.start_main_~#x~0#1.offset| 12)))) (< |v_ULTIMATE.start_main_~i~2#1_43| 2))))) is different from false [2021-12-16 22:29:01,569 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_43| Int) (v_ArrVal_444 Int) (v_ArrVal_442 Int) (v_ArrVal_440 Int) (v_ArrVal_439 Int)) (let ((.cse4 (store (store (select |c_#memory_int| |c_max_#in~x.base|) |c_max_#in~x.offset| v_ArrVal_439) (+ |c_max_#in~x.offset| 4) v_ArrVal_440)) (.cse1 (* |v_ULTIMATE.start_main_~i~2#1_43| 4))) (let ((.cse0 (store .cse4 (+ .cse1 |c_max_#in~x.offset|) v_ArrVal_442)) (.cse3 (+ .cse1 |c_max_#in~x.offset| 4))) (or (< v_ArrVal_444 (select .cse0 (+ .cse1 |c_max_#in~x.offset| 8))) (let ((.cse2 (store .cse0 .cse3 v_ArrVal_444))) (<= (+ (select .cse2 (+ |c_max_#in~x.offset| 8)) 1) (select .cse2 (+ |c_max_#in~x.offset| 12)))) (<= 3 |v_ULTIMATE.start_main_~i~2#1_43|) (< (select .cse4 .cse3) v_ArrVal_442) (< |v_ULTIMATE.start_main_~i~2#1_43| 2))))) is different from false [2021-12-16 22:29:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 228 proven. 177 refuted. 0 times theorem prover too weak. 99 trivial. 17 not checked. [2021-12-16 22:29:17,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089150125] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:29:17,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:29:17,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 30] total 89 [2021-12-16 22:29:17,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335598963] [2021-12-16 22:29:17,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:29:17,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-16 22:29:17,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:29:17,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-16 22:29:17,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=6173, Unknown=45, NotChecked=1002, Total=7832 [2021-12-16 22:29:17,732 INFO L87 Difference]: Start difference. First operand 631 states and 936 transitions. Second operand has 89 states, 89 states have (on average 1.9325842696629214) internal successors, (172), 87 states have internal predecessors, (172), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-16 22:32:32,483 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~2#1_43| Int) (v_ArrVal_444 Int) (v_ArrVal_442 Int) (v_ArrVal_440 Int) (v_ArrVal_439 Int)) (let ((.cse4 (store (store (select |c_#memory_int| |c_max_#in~x.base|) |c_max_#in~x.offset| v_ArrVal_439) (+ |c_max_#in~x.offset| 4) v_ArrVal_440)) (.cse1 (* |v_ULTIMATE.start_main_~i~2#1_43| 4))) (let ((.cse0 (store .cse4 (+ .cse1 |c_max_#in~x.offset|) v_ArrVal_442)) (.cse3 (+ .cse1 |c_max_#in~x.offset| 4))) (or (< v_ArrVal_444 (select .cse0 (+ .cse1 |c_max_#in~x.offset| 8))) (let ((.cse2 (store .cse0 .cse3 v_ArrVal_444))) (<= (+ (select .cse2 (+ |c_max_#in~x.offset| 8)) 1) (select .cse2 (+ |c_max_#in~x.offset| 12)))) (<= 3 |v_ULTIMATE.start_main_~i~2#1_43|) (< (select .cse4 .cse3) v_ArrVal_442) (< |v_ULTIMATE.start_main_~i~2#1_43| 2))))) (let ((.cse5 (select |c_#memory_int| |c_max_#in~x.base|))) (<= (+ (select .cse5 (+ |c_max_#in~x.offset| 12)) 1) (select .cse5 (+ |c_max_#in~x.offset| 16))))) is different from false [2021-12-16 22:32:36,274 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_int| c_max_~x.base))) (and (forall ((|v_ULTIMATE.start_main_~i~2#1_43| Int) (v_ArrVal_444 Int) (v_ArrVal_442 Int) (v_ArrVal_440 Int) (v_ArrVal_439 Int)) (let ((.cse4 (store (store (select |c_#memory_int| |c_max_#in~x.base|) |c_max_#in~x.offset| v_ArrVal_439) (+ |c_max_#in~x.offset| 4) v_ArrVal_440)) (.cse1 (* |v_ULTIMATE.start_main_~i~2#1_43| 4))) (let ((.cse0 (store .cse4 (+ .cse1 |c_max_#in~x.offset|) v_ArrVal_442)) (.cse3 (+ .cse1 |c_max_#in~x.offset| 4))) (or (< v_ArrVal_444 (select .cse0 (+ .cse1 |c_max_#in~x.offset| 8))) (let ((.cse2 (store .cse0 .cse3 v_ArrVal_444))) (<= (+ (select .cse2 (+ |c_max_#in~x.offset| 8)) 1) (select .cse2 (+ |c_max_#in~x.offset| 12)))) (<= 3 |v_ULTIMATE.start_main_~i~2#1_43|) (< (select .cse4 .cse3) v_ArrVal_442) (< |v_ULTIMATE.start_main_~i~2#1_43| 2))))) (<= (select .cse5 (+ (* c_max_~i~0 4) c_max_~x.offset (- 4))) c_max_~ret~0) (let ((.cse6 (select |c_#memory_int| |c_max_#in~x.base|))) (<= (+ (select .cse6 (+ |c_max_#in~x.offset| 12)) 1) (select .cse6 (+ |c_max_#in~x.offset| 16)))) (= |c_max_#in~x.base| c_max_~x.base) (= c_max_~x.base |c_max_#in~x.base|) (= |c_max_#in~x.offset| c_max_~x.offset) (<= (select .cse5 (+ c_max_~x.offset 12)) (select .cse5 (+ c_max_~x.offset 8))) (= c_max_~x.offset |c_max_#in~x.offset|))) is different from false Killed by 15