./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/eqn5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e073edc56aff813529d4e364baa44cd4d0bb851f ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/eqn5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 e073edc56aff813529d4e364baa44cd4d0bb851f .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 01:55:28,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 01:55:28,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 01:55:28,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 01:55:28,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 01:55:28,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 01:55:28,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 01:55:28,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 01:55:28,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 01:55:28,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 01:55:28,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 01:55:28,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 01:55:28,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 01:55:28,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 01:55:28,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 01:55:28,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 01:55:28,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 01:55:28,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 01:55:28,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 01:55:28,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 01:55:28,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 01:55:28,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 01:55:28,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 01:55:28,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 01:55:28,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 01:55:28,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 01:55:28,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 01:55:28,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 01:55:28,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 01:55:28,343 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 01:55:28,343 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 01:55:28,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 01:55:28,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 01:55:28,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 01:55:28,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 01:55:28,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 01:55:28,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 01:55:28,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 01:55:28,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 01:55:28,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 01:55:28,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 01:55:28,350 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 01:55:28,371 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 01:55:28,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 01:55:28,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 01:55:28,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 01:55:28,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 01:55:28,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 01:55:28,376 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 01:55:28,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 01:55:28,377 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 01:55:28,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 01:55:28,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 01:55:28,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 01:55:28,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 01:55:28,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 01:55:28,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 01:55:28,379 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 01:55:28,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 01:55:28,379 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 01:55:28,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 01:55:28,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 01:55:28,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 01:55:28,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 01:55:28,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 01:55:28,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 01:55:28,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 01:55:28,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 01:55:28,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 01:55:28,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 01:55:28,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 01:55:28,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 01:55:28,382 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e073edc56aff813529d4e364baa44cd4d0bb851f [2021-08-29 01:55:28,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 01:55:28,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 01:55:28,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 01:55:28,736 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 01:55:28,737 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 01:55:28,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn5.c [2021-08-29 01:55:28,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab751473d/6ca569c3033f4aa0ab0ac41bf6ef6bfa/FLAG63928bef5 [2021-08-29 01:55:29,255 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 01:55:29,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5.c [2021-08-29 01:55:29,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab751473d/6ca569c3033f4aa0ab0ac41bf6ef6bfa/FLAG63928bef5 [2021-08-29 01:55:29,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab751473d/6ca569c3033f4aa0ab0ac41bf6ef6bfa [2021-08-29 01:55:29,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 01:55:29,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 01:55:29,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 01:55:29,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 01:55:29,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 01:55:29,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 01:55:29" (1/1) ... [2021-08-29 01:55:29,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f1f5c2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:55:29, skipping insertion in model container [2021-08-29 01:55:29,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 01:55:29" (1/1) ... [2021-08-29 01:55:29,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 01:55:29,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 01:55:29,418 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5.c[587,600] [2021-08-29 01:55:29,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 01:55:29,441 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 01:55:29,478 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5.c[587,600] [2021-08-29 01:55:29,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 01:55:29,503 INFO L208 MainTranslator]: Completed translation [2021-08-29 01:55:29,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:55:29 WrapperNode [2021-08-29 01:55:29,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 01:55:29,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 01:55:29,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 01:55:29,506 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 01:55:29,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:55:29" (1/1) ... [2021-08-29 01:55:29,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:55:29" (1/1) ... [2021-08-29 01:55:29,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 01:55:29,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 01:55:29,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 01:55:29,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 01:55:29,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:55:29" (1/1) ... [2021-08-29 01:55:29,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:55:29" (1/1) ... [2021-08-29 01:55:29,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:55:29" (1/1) ... [2021-08-29 01:55:29,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:55:29" (1/1) ... [2021-08-29 01:55:29,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:55:29" (1/1) ... [2021-08-29 01:55:29,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:55:29" (1/1) ... [2021-08-29 01:55:29,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:55:29" (1/1) ... [2021-08-29 01:55:29,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 01:55:29,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 01:55:29,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 01:55:29,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 01:55:29,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:55:29" (1/1) ... [2021-08-29 01:55:29,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 01:55:29,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:55:29,586 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) [2021-08-29 01:55:29,599 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 [2021-08-29 01:55:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 01:55:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 01:55:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-29 01:55:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-29 01:55:29,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 01:55:29,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 01:55:29,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-29 01:55:29,794 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 01:55:29,794 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-29 01:55:29,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 01:55:29 BoogieIcfgContainer [2021-08-29 01:55:29,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 01:55:29,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 01:55:29,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 01:55:29,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 01:55:29,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 01:55:29" (1/3) ... [2021-08-29 01:55:29,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795b0559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 01:55:29, skipping insertion in model container [2021-08-29 01:55:29,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:55:29" (2/3) ... [2021-08-29 01:55:29,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795b0559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 01:55:29, skipping insertion in model container [2021-08-29 01:55:29,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 01:55:29" (3/3) ... [2021-08-29 01:55:29,807 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn5.c [2021-08-29 01:55:29,811 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 01:55:29,812 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 01:55:29,887 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 01:55:29,896 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-29 01:55:29,897 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 01:55:29,913 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:29,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-29 01:55:29,920 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:55:29,921 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:55:29,922 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:55:29,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:55:29,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-08-29 01:55:29,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:55:29,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508080930] [2021-08-29 01:55:29,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:55:29,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:55:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:55:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:55:30,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:55:30,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508080930] [2021-08-29 01:55:30,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508080930] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 01:55:30,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:55:30,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 01:55:30,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748692570] [2021-08-29 01:55:30,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 01:55:30,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:55:30,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 01:55:30,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 01:55:30,164 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:30,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:55:30,268 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-08-29 01:55:30,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 01:55:30,271 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-29 01:55:30,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:55:30,276 INFO L225 Difference]: With dead ends: 38 [2021-08-29 01:55:30,277 INFO L226 Difference]: Without dead ends: 17 [2021-08-29 01:55:30,279 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 01:55:30,294 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.35ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.33ms IncrementalHoareTripleChecker+Time [2021-08-29 01:55:30,295 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 24 Unknown, 0 Unchecked, 0.35ms Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 88.33ms Time] [2021-08-29 01:55:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-29 01:55:30,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-29 01:55:30,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-29 01:55:30,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-08-29 01:55:30,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:55:30,337 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-29 01:55:30,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:30,338 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-29 01:55:30,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-29 01:55:30,339 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:55:30,339 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:55:30,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 01:55:30,340 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:55:30,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:55:30,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-08-29 01:55:30,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:55:30,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579318547] [2021-08-29 01:55:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:55:30,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:55:30,375 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:55:30,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120944919] [2021-08-29 01:55:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:55:30,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:55:30,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:55:30,396 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) [2021-08-29 01:55:30,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 01:55:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:55:30,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-29 01:55:30,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:55:30,554 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-29 01:55:30,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-08-29 01:55:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:55:30,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 01:55:30,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:55:30,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579318547] [2021-08-29 01:55:30,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:55:30,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120944919] [2021-08-29 01:55:30,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120944919] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 01:55:30,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:55:30,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 01:55:30,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831765107] [2021-08-29 01:55:30,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 01:55:30,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:55:30,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 01:55:30,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-29 01:55:30,741 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:55:30,895 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-08-29 01:55:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 01:55:30,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-29 01:55:30,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:55:30,896 INFO L225 Difference]: With dead ends: 34 [2021-08-29 01:55:30,896 INFO L226 Difference]: Without dead ends: 32 [2021-08-29 01:55:30,897 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.60ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-29 01:55:30,899 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.45ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 120.81ms IncrementalHoareTripleChecker+Time [2021-08-29 01:55:30,901 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 92 Unknown, 0 Unchecked, 1.45ms Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 120.81ms Time] [2021-08-29 01:55:30,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-29 01:55:30,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-08-29 01:55:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-29 01:55:30,910 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-08-29 01:55:30,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:55:30,911 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-29 01:55:30,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:30,912 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-29 01:55:30,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 01:55:30,913 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:55:30,913 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:55:30,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 01:55:31,137 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 [2021-08-29 01:55:31,137 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:55:31,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:55:31,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-08-29 01:55:31,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:55:31,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256739253] [2021-08-29 01:55:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:55:31,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:55:31,152 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:55:31,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250616223] [2021-08-29 01:55:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:55:31,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:55:31,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:55:31,154 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) [2021-08-29 01:55:31,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 01:55:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:55:31,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-29 01:55:31,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:55:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:55:31,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 01:55:31,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:55:31,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256739253] [2021-08-29 01:55:31,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:55:31,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250616223] [2021-08-29 01:55:31,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250616223] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 01:55:31,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:55:31,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 01:55:31,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719234548] [2021-08-29 01:55:31,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 01:55:31,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:55:31,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 01:55:31,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-29 01:55:31,291 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:31,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:55:31,388 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-08-29 01:55:31,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 01:55:31,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-29 01:55:31,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:55:31,390 INFO L225 Difference]: With dead ends: 49 [2021-08-29 01:55:31,391 INFO L226 Difference]: Without dead ends: 40 [2021-08-29 01:55:31,391 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.92ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-29 01:55:31,394 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.34ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.26ms IncrementalHoareTripleChecker+Time [2021-08-29 01:55:31,396 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 1.34ms Time], IncrementalHoareTripleChecker [9 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 67.26ms Time] [2021-08-29 01:55:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-29 01:55:31,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-08-29 01:55:31,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-29 01:55:31,407 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-08-29 01:55:31,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:55:31,407 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-29 01:55:31,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:31,408 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-29 01:55:31,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 01:55:31,408 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:55:31,408 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:55:31,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-29 01:55:31,613 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 [2021-08-29 01:55:31,614 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:55:31,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:55:31,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-08-29 01:55:31,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:55:31,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318745321] [2021-08-29 01:55:31,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:55:31,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:55:31,662 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:55:31,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462223315] [2021-08-29 01:55:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:55:31,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:55:31,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:55:31,671 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) [2021-08-29 01:55:31,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 01:55:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:55:31,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-29 01:55:31,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:55:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:55:31,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:55:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:55:31,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:55:31,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318745321] [2021-08-29 01:55:31,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:55:31,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462223315] [2021-08-29 01:55:31,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462223315] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 01:55:31,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 01:55:31,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-29 01:55:31,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996431450] [2021-08-29 01:55:31,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 01:55:31,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:55:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 01:55:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-29 01:55:31,811 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:55:31,927 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-08-29 01:55:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 01:55:31,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-29 01:55:31,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:55:31,928 INFO L225 Difference]: With dead ends: 44 [2021-08-29 01:55:31,929 INFO L226 Difference]: Without dead ends: 37 [2021-08-29 01:55:31,930 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 36.78ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-29 01:55:31,932 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.37ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.05ms IncrementalHoareTripleChecker+Time [2021-08-29 01:55:31,938 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 118 Unknown, 0 Unchecked, 2.37ms Time], IncrementalHoareTripleChecker [12 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 75.05ms Time] [2021-08-29 01:55:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-29 01:55:31,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-08-29 01:55:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:31,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-08-29 01:55:31,950 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-08-29 01:55:31,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:55:31,950 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-08-29 01:55:31,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:31,951 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-08-29 01:55:31,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 01:55:31,952 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:55:31,952 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:55:31,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 01:55:32,168 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 [2021-08-29 01:55:32,169 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:55:32,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:55:32,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-08-29 01:55:32,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:55:32,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793032626] [2021-08-29 01:55:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:55:32,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:55:32,186 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:55:32,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043250210] [2021-08-29 01:55:32,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:55:32,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:55:32,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:55:32,217 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) [2021-08-29 01:55:32,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 01:55:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:55:32,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 01:55:32,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:55:32,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:55:32,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 01:55:32,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:55:32,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793032626] [2021-08-29 01:55:32,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:55:32,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043250210] [2021-08-29 01:55:32,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043250210] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 01:55:32,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:55:32,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 01:55:32,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403240529] [2021-08-29 01:55:32,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 01:55:32,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:55:32,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 01:55:32,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-29 01:55:32,393 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:55:32,506 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-08-29 01:55:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 01:55:32,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-29 01:55:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:55:32,507 INFO L225 Difference]: With dead ends: 41 [2021-08-29 01:55:32,507 INFO L226 Difference]: Without dead ends: 27 [2021-08-29 01:55:32,508 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.91ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-29 01:55:32,508 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.91ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.86ms IncrementalHoareTripleChecker+Time [2021-08-29 01:55:32,509 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 84 Unknown, 0 Unchecked, 0.91ms Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 86.86ms Time] [2021-08-29 01:55:32,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-29 01:55:32,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-08-29 01:55:32,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:32,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-29 01:55:32,511 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-08-29 01:55:32,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:55:32,511 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-29 01:55:32,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:32,512 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-29 01:55:32,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 01:55:32,512 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:55:32,512 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:55:32,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 01:55:32,712 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 [2021-08-29 01:55:32,713 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:55:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:55:32,713 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-08-29 01:55:32,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:55:32,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905548560] [2021-08-29 01:55:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:55:32,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:55:32,731 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:55:32,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342012886] [2021-08-29 01:55:32,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:55:32,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:55:32,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:55:32,737 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) [2021-08-29 01:55:32,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 01:55:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:55:32,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-29 01:55:32,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:55:32,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-29 01:55:32,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-29 01:55:32,891 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-08-29 01:55:32,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2021-08-29 01:55:33,064 INFO L354 Elim1Store]: treesize reduction 124, result has 16.2 percent of original size [2021-08-29 01:55:33,064 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 59 treesize of output 50 [2021-08-29 01:55:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:55:33,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:55:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:55:33,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:55:33,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905548560] [2021-08-29 01:55:33,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:55:33,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342012886] [2021-08-29 01:55:33,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342012886] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 01:55:33,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 01:55:33,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-29 01:55:33,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036840359] [2021-08-29 01:55:33,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-29 01:55:33,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:55:33,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-29 01:55:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-29 01:55:33,913 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:35,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:55:35,171 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-08-29 01:55:35,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-29 01:55:35,172 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-29 01:55:35,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:55:35,173 INFO L225 Difference]: With dead ends: 41 [2021-08-29 01:55:35,173 INFO L226 Difference]: Without dead ends: 39 [2021-08-29 01:55:35,174 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1143.20ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-29 01:55:35,174 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 399.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.87ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 430.31ms IncrementalHoareTripleChecker+Time [2021-08-29 01:55:35,175 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 152 Unknown, 0 Unchecked, 1.87ms Time], IncrementalHoareTripleChecker [15 Valid, 110 Invalid, 0 Unknown, 27 Unchecked, 430.31ms Time] [2021-08-29 01:55:35,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-29 01:55:35,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-08-29 01:55:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:35,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-08-29 01:55:35,179 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 16 [2021-08-29 01:55:35,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:55:35,180 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-08-29 01:55:35,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:35,180 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-08-29 01:55:35,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-29 01:55:35,181 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:55:35,181 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:55:35,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-29 01:55:35,399 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 [2021-08-29 01:55:35,399 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:55:35,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:55:35,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2021-08-29 01:55:35,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:55:35,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009141983] [2021-08-29 01:55:35,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:55:35,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:55:35,418 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:55:35,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011483189] [2021-08-29 01:55:35,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 01:55:35,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:55:35,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:55:35,420 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) [2021-08-29 01:55:35,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 01:55:35,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 01:55:35,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 01:55:35,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 01:55:35,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:55:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:55:35,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:55:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:55:35,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:55:35,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009141983] [2021-08-29 01:55:35,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:55:35,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011483189] [2021-08-29 01:55:35,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011483189] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 01:55:35,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 01:55:35,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-29 01:55:35,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634806232] [2021-08-29 01:55:35,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 01:55:35,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:55:35,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 01:55:35,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-29 01:55:35,618 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:35,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:55:35,775 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-08-29 01:55:35,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 01:55:35,776 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-29 01:55:35,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:55:35,776 INFO L225 Difference]: With dead ends: 67 [2021-08-29 01:55:35,776 INFO L226 Difference]: Without dead ends: 58 [2021-08-29 01:55:35,777 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 68.17ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-29 01:55:35,777 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.27ms IncrementalHoareTripleChecker+Time [2021-08-29 01:55:35,777 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 142 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [24 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 105.27ms Time] [2021-08-29 01:55:35,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-29 01:55:35,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 34. [2021-08-29 01:55:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-08-29 01:55:35,782 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2021-08-29 01:55:35,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:55:35,782 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-08-29 01:55:35,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:35,782 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-08-29 01:55:35,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 01:55:35,783 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:55:35,783 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:55:35,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 01:55:35,983 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 [2021-08-29 01:55:35,983 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:55:35,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:55:35,984 INFO L82 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-08-29 01:55:35,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:55:35,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011214043] [2021-08-29 01:55:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:55:35,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:55:36,002 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:55:36,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449712220] [2021-08-29 01:55:36,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:55:36,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:55:36,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:55:36,005 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) [2021-08-29 01:55:36,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 01:55:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:55:36,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-29 01:55:36,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:55:36,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-29 01:55:36,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-29 01:55:36,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:36,149 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-29 01:55:36,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2021-08-29 01:55:36,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:36,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:36,242 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-29 01:55:36,243 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 4 case distinctions, treesize of input 51 treesize of output 44 [2021-08-29 01:55:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:55:36,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:55:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:55:37,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:55:37,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011214043] [2021-08-29 01:55:37,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:55:37,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449712220] [2021-08-29 01:55:37,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449712220] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 01:55:37,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 01:55:37,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-29 01:55:37,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955993792] [2021-08-29 01:55:37,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-29 01:55:37,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:55:37,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-29 01:55:37,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-29 01:55:37,351 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:38,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:55:38,888 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-08-29 01:55:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-29 01:55:38,889 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-29 01:55:38,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:55:38,889 INFO L225 Difference]: With dead ends: 68 [2021-08-29 01:55:38,889 INFO L226 Difference]: Without dead ends: 66 [2021-08-29 01:55:38,890 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1476.53ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-08-29 01:55:38,890 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 517.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.96ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 575.96ms IncrementalHoareTripleChecker+Time [2021-08-29 01:55:38,891 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 289 Unknown, 0 Unchecked, 2.96ms Time], IncrementalHoareTripleChecker [54 Valid, 184 Invalid, 0 Unknown, 51 Unchecked, 575.96ms Time] [2021-08-29 01:55:38,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-29 01:55:38,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 43. [2021-08-29 01:55:38,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:38,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-08-29 01:55:38,897 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 20 [2021-08-29 01:55:38,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:55:38,897 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-08-29 01:55:38,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:55:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-08-29 01:55:38,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 01:55:38,901 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:55:38,901 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:55:38,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 01:55:39,124 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 [2021-08-29 01:55:39,125 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:55:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:55:39,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2021-08-29 01:55:39,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:55:39,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019621610] [2021-08-29 01:55:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:55:39,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:55:39,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:55:39,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174695928] [2021-08-29 01:55:39,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 01:55:39,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:55:39,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:55:39,166 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) [2021-08-29 01:55:39,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 01:55:39,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-29 01:55:39,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 01:55:39,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-29 01:55:39,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:55:39,315 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-29 01:55:39,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-08-29 01:55:39,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-29 01:55:39,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:39,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,387 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-29 01:55:39,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 304 [2021-08-29 01:55:39,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:39,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,454 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-29 01:55:39,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 136 treesize of output 80 [2021-08-29 01:55:39,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:39,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 79 [2021-08-29 01:55:39,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:39,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 75 [2021-08-29 01:55:39,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,631 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-29 01:55:39,632 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 51 treesize of output 46 [2021-08-29 01:55:39,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:39,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:39,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:39,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:39,825 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-08-29 01:55:39,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 30 case distinctions, treesize of input 262 treesize of output 508 [2021-08-29 01:55:39,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-29 01:55:39,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:39,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:39,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:39,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 141 [2021-08-29 01:55:40,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,071 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-29 01:55:40,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 358 treesize of output 218 [2021-08-29 01:55:40,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,118 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-29 01:55:40,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 280 treesize of output 156 [2021-08-29 01:55:40,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,361 INFO L354 Elim1Store]: treesize reduction 82, result has 15.5 percent of original size [2021-08-29 01:55:40,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 38 case distinctions, treesize of input 303 treesize of output 569 [2021-08-29 01:55:40,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-29 01:55:40,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 13 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 144 [2021-08-29 01:55:40,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 13 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 352 treesize of output 175 [2021-08-29 01:55:40,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:55:40,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:55:40,772 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-29 01:55:40,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 268 treesize of output 141 [2021-08-29 01:55:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:55:41,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:55:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:55:46,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:55:46,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019621610] [2021-08-29 01:55:46,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:55:46,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174695928] [2021-08-29 01:55:46,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174695928] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 01:55:46,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 01:55:46,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-29 01:55:46,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869870729] [2021-08-29 01:55:46,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-29 01:55:46,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:55:46,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-29 01:55:46,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-08-29 01:55:46,921 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:16,662 WARN L210 SmtUtils]: Spent 26.90s on a formula simplification. DAG size of input: 317 DAG size of output: 268 [2021-08-29 01:56:18,127 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 01:57:13,463 WARN L210 SmtUtils]: Spent 50.74s on a formula simplification. DAG size of input: 329 DAG size of output: 280 [2021-08-29 01:59:03,760 WARN L210 SmtUtils]: Spent 1.77m on a formula simplification. DAG size of input: 331 DAG size of output: 282 [2021-08-29 01:59:12,552 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-08-29 01:59:22,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:59:22,250 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2021-08-29 01:59:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-29 01:59:22,251 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-29 01:59:22,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:59:22,251 INFO L225 Difference]: With dead ends: 92 [2021-08-29 01:59:22,252 INFO L226 Difference]: Without dead ends: 79 [2021-08-29 01:59:22,252 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 202918.99ms TimeCoverageRelationStatistics Valid=501, Invalid=1391, Unknown=0, NotChecked=0, Total=1892 [2021-08-29 01:59:22,253 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 111 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16055.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.45ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 16715.93ms IncrementalHoareTripleChecker+Time [2021-08-29 01:59:22,253 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 545 Unknown, 0 Unchecked, 5.45ms Time], IncrementalHoareTripleChecker [111 Valid, 341 Invalid, 1 Unknown, 92 Unchecked, 16715.93ms Time] [2021-08-29 01:59:22,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-29 01:59:22,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2021-08-29 01:59:22,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:22,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2021-08-29 01:59:22,262 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 20 [2021-08-29 01:59:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:59:22,262 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2021-08-29 01:59:22,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:22,262 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2021-08-29 01:59:22,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-29 01:59:22,263 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:59:22,263 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:59:22,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-29 01:59:22,464 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 [2021-08-29 01:59:22,464 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:59:22,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:59:22,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 2 times [2021-08-29 01:59:22,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:59:22,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157033761] [2021-08-29 01:59:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:59:22,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:59:22,482 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:59:22,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246621479] [2021-08-29 01:59:22,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 01:59:22,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:59:22,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:59:22,483 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) [2021-08-29 01:59:22,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-29 01:59:22,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 01:59:22,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 01:59:22,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 01:59:22,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:59:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 01:59:22,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:59:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 01:59:22,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:59:22,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157033761] [2021-08-29 01:59:22,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:59:22,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246621479] [2021-08-29 01:59:22,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246621479] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 01:59:22,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 01:59:22,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-29 01:59:22,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012745893] [2021-08-29 01:59:22,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 01:59:22,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:59:22,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 01:59:22,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-29 01:59:22,718 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:59:22,893 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2021-08-29 01:59:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 01:59:22,893 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-29 01:59:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:59:22,894 INFO L225 Difference]: With dead ends: 101 [2021-08-29 01:59:22,894 INFO L226 Difference]: Without dead ends: 81 [2021-08-29 01:59:22,894 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 74.71ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-08-29 01:59:22,895 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.91ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.37ms IncrementalHoareTripleChecker+Time [2021-08-29 01:59:22,895 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 149 Unknown, 0 Unchecked, 0.91ms Time], IncrementalHoareTripleChecker [30 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 134.37ms Time] [2021-08-29 01:59:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-29 01:59:22,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2021-08-29 01:59:22,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-08-29 01:59:22,903 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 24 [2021-08-29 01:59:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:59:22,903 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-08-29 01:59:22,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-08-29 01:59:22,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-29 01:59:22,904 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:59:22,904 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:59:22,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-29 01:59:23,108 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 [2021-08-29 01:59:23,109 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:59:23,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:59:23,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1083970380, now seen corresponding path program 3 times [2021-08-29 01:59:23,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:59:23,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159873656] [2021-08-29 01:59:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:59:23,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:59:23,133 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:59:23,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356023766] [2021-08-29 01:59:23,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 01:59:23,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:59:23,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:59:23,146 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) [2021-08-29 01:59:23,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-29 01:59:23,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-29 01:59:23,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 01:59:23,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 01:59:23,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:59:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-29 01:59:23,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:59:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-29 01:59:23,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:59:23,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159873656] [2021-08-29 01:59:23,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:59:23,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356023766] [2021-08-29 01:59:23,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356023766] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 01:59:23,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 01:59:23,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-29 01:59:23,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581171871] [2021-08-29 01:59:23,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 01:59:23,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:59:23,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 01:59:23,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-29 01:59:23,420 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:23,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:59:23,606 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2021-08-29 01:59:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-29 01:59:23,607 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-29 01:59:23,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:59:23,608 INFO L225 Difference]: With dead ends: 79 [2021-08-29 01:59:23,608 INFO L226 Difference]: Without dead ends: 67 [2021-08-29 01:59:23,608 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 66.08ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-29 01:59:23,609 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.88ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137.50ms IncrementalHoareTripleChecker+Time [2021-08-29 01:59:23,609 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 138 Unknown, 0 Unchecked, 0.88ms Time], IncrementalHoareTripleChecker [19 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 137.50ms Time] [2021-08-29 01:59:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-29 01:59:23,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-08-29 01:59:23,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:23,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-08-29 01:59:23,615 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 24 [2021-08-29 01:59:23,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:59:23,616 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-08-29 01:59:23,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:23,616 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-08-29 01:59:23,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-29 01:59:23,617 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:59:23,617 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:59:23,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-29 01:59:23,821 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 [2021-08-29 01:59:23,822 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:59:23,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:59:23,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 4 times [2021-08-29 01:59:23,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:59:23,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611619164] [2021-08-29 01:59:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:59:23,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:59:23,853 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:59:23,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42823332] [2021-08-29 01:59:23,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 01:59:23,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:59:23,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:59:23,858 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) [2021-08-29 01:59:23,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-29 01:59:24,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 01:59:24,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 01:59:24,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-29 01:59:24,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:59:24,291 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-29 01:59:24,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-08-29 01:59:24,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-29 01:59:24,448 INFO L354 Elim1Store]: treesize reduction 663, result has 15.8 percent of original size [2021-08-29 01:59:24,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 186 treesize of output 275 [2021-08-29 01:59:24,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:24,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:24,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:24,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 68 [2021-08-29 01:59:24,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:24,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:24,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:24,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 74 [2021-08-29 01:59:24,601 INFO L354 Elim1Store]: treesize reduction 118, result has 2.5 percent of original size [2021-08-29 01:59:24,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 57 [2021-08-29 01:59:24,684 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-08-29 01:59:24,684 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 [2021-08-29 01:59:25,030 INFO L354 Elim1Store]: treesize reduction 1004, result has 20.4 percent of original size [2021-08-29 01:59:25,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 30 case distinctions, treesize of input 212 treesize of output 416 [2021-08-29 01:59:25,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-29 01:59:25,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 76 [2021-08-29 01:59:25,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 79 [2021-08-29 01:59:25,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 79 [2021-08-29 01:59:25,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,573 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-08-29 01:59:25,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 340 treesize of output 236 [2021-08-29 01:59:25,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:25,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 111 [2021-08-29 01:59:29,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:59:29,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611619164] [2021-08-29 01:59:29,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:59:29,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42823332] [2021-08-29 01:59:29,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-29 01:59:29,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:59:29,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-29 01:59:29,384 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-08-29 01:59:29,384 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-08-29 01:59:29,401 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 01:59:29,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-29 01:59:29,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-29 01:59:29,634 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 01:59:29,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 01:59:29 BoogieIcfgContainer [2021-08-29 01:59:29,654 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 01:59:29,655 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 01:59:29,655 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 01:59:29,656 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 01:59:29,656 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 01:55:29" (3/4) ... [2021-08-29 01:59:29,659 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-29 01:59:29,659 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 01:59:29,659 INFO L158 Benchmark]: Toolchain (without parser) took 240372.98ms. Allocated memory was 60.8MB in the beginning and 121.6MB in the end (delta: 60.8MB). Free memory was 39.8MB in the beginning and 99.7MB in the end (delta: -59.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 01:59:29,660 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 60.8MB. Free memory was 43.4MB in the beginning and 43.4MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 01:59:29,660 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.36ms. Allocated memory is still 60.8MB. Free memory was 39.7MB in the beginning and 44.0MB in the end (delta: -4.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-29 01:59:29,663 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.33ms. Allocated memory is still 60.8MB. Free memory was 44.0MB in the beginning and 42.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 01:59:29,664 INFO L158 Benchmark]: Boogie Preprocessor took 20.32ms. Allocated memory is still 60.8MB. Free memory was 42.3MB in the beginning and 41.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 01:59:29,664 INFO L158 Benchmark]: RCFGBuilder took 239.14ms. Allocated memory is still 60.8MB. Free memory was 40.9MB in the beginning and 31.3MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 01:59:29,665 INFO L158 Benchmark]: TraceAbstraction took 239854.64ms. Allocated memory was 60.8MB in the beginning and 121.6MB in the end (delta: 60.8MB). Free memory was 30.8MB in the beginning and 99.7MB in the end (delta: -68.9MB). Peak memory consumption was 62.9MB. Max. memory is 16.1GB. [2021-08-29 01:59:29,665 INFO L158 Benchmark]: Witness Printer took 3.47ms. Allocated memory is still 121.6MB. Free memory is still 99.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 01:59:29,666 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 60.8MB. Free memory was 43.4MB in the beginning and 43.4MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 215.36ms. Allocated memory is still 60.8MB. Free memory was 39.7MB in the beginning and 44.0MB in the end (delta: -4.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.33ms. Allocated memory is still 60.8MB. Free memory was 44.0MB in the beginning and 42.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.32ms. Allocated memory is still 60.8MB. Free memory was 42.3MB in the beginning and 41.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 239.14ms. Allocated memory is still 60.8MB. Free memory was 40.9MB in the beginning and 31.3MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 239854.64ms. Allocated memory was 60.8MB in the beginning and 121.6MB in the end (delta: 60.8MB). Free memory was 30.8MB in the beginning and 99.7MB in the end (delta: -68.9MB). Peak memory consumption was 62.9MB. Max. memory is 16.1GB. * Witness Printer took 3.47ms. Allocated memory is still 121.6MB. Free memory is still 99.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 10 [L32] b[0] = 1 [L33] i=1 [L33] COND TRUE i 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 -> e073edc56aff813529d4e364baa44cd4d0bb851f [2021-08-29 01:59:32,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 01:59:32,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 01:59:32,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 01:59:32,168 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 01:59:32,168 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 01:59:32,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn5.c [2021-08-29 01:59:32,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/730db77f5/bb63322e013d42c09cf2419c37a27998/FLAGe8b0b0d46 [2021-08-29 01:59:32,703 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 01:59:32,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5.c [2021-08-29 01:59:32,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/730db77f5/bb63322e013d42c09cf2419c37a27998/FLAGe8b0b0d46 [2021-08-29 01:59:33,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/730db77f5/bb63322e013d42c09cf2419c37a27998 [2021-08-29 01:59:33,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 01:59:33,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 01:59:33,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 01:59:33,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 01:59:33,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 01:59:33,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 01:59:33" (1/1) ... [2021-08-29 01:59:33,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34fa283b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:59:33, skipping insertion in model container [2021-08-29 01:59:33,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 01:59:33" (1/1) ... [2021-08-29 01:59:33,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 01:59:33,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 01:59:33,273 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5.c[587,600] [2021-08-29 01:59:33,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 01:59:33,312 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 01:59:33,331 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5.c[587,600] [2021-08-29 01:59:33,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 01:59:33,367 INFO L208 MainTranslator]: Completed translation [2021-08-29 01:59:33,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:59:33 WrapperNode [2021-08-29 01:59:33,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 01:59:33,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 01:59:33,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 01:59:33,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 01:59:33,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:59:33" (1/1) ... [2021-08-29 01:59:33,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:59:33" (1/1) ... [2021-08-29 01:59:33,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 01:59:33,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 01:59:33,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 01:59:33,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 01:59:33,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:59:33" (1/1) ... [2021-08-29 01:59:33,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:59:33" (1/1) ... [2021-08-29 01:59:33,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:59:33" (1/1) ... [2021-08-29 01:59:33,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:59:33" (1/1) ... [2021-08-29 01:59:33,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:59:33" (1/1) ... [2021-08-29 01:59:33,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:59:33" (1/1) ... [2021-08-29 01:59:33,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:59:33" (1/1) ... [2021-08-29 01:59:33,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 01:59:33,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 01:59:33,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 01:59:33,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 01:59:33,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:59:33" (1/1) ... [2021-08-29 01:59:33,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 01:59:33,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:59:33,486 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) [2021-08-29 01:59:33,510 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 [2021-08-29 01:59:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-29 01:59:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 01:59:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-08-29 01:59:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-29 01:59:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 01:59:33,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 01:59:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-08-29 01:59:33,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 01:59:33,710 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-29 01:59:33,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 01:59:33 BoogieIcfgContainer [2021-08-29 01:59:33,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 01:59:33,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 01:59:33,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 01:59:33,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 01:59:33,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 01:59:33" (1/3) ... [2021-08-29 01:59:33,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6611c2bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 01:59:33, skipping insertion in model container [2021-08-29 01:59:33,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:59:33" (2/3) ... [2021-08-29 01:59:33,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6611c2bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 01:59:33, skipping insertion in model container [2021-08-29 01:59:33,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 01:59:33" (3/3) ... [2021-08-29 01:59:33,717 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn5.c [2021-08-29 01:59:33,724 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 01:59:33,724 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 01:59:33,760 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 01:59:33,766 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-29 01:59:33,766 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 01:59:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-29 01:59:33,781 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:59:33,782 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:59:33,783 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:59:33,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:59:33,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-08-29 01:59:33,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 01:59:33,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385684196] [2021-08-29 01:59:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:59:33,804 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 01:59:33,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 01:59:33,806 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 01:59:33,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-29 01:59:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:59:33,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-29 01:59:33,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:59:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:59:34,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:59:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:59:34,126 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 01:59:34,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385684196] [2021-08-29 01:59:34,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385684196] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 01:59:34,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:59:34,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-29 01:59:34,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816594175] [2021-08-29 01:59:34,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 01:59:34,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 01:59:34,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 01:59:34,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 01:59:34,154 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:34,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:59:34,271 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-08-29 01:59:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 01:59:34,274 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-29 01:59:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:59:34,280 INFO L225 Difference]: With dead ends: 38 [2021-08-29 01:59:34,280 INFO L226 Difference]: Without dead ends: 17 [2021-08-29 01:59:34,284 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.11ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 01:59:34,290 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.37ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.05ms IncrementalHoareTripleChecker+Time [2021-08-29 01:59:34,292 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 24 Unknown, 0 Unchecked, 0.37ms Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 101.05ms Time] [2021-08-29 01:59:34,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-29 01:59:34,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-29 01:59:34,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:34,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-29 01:59:34,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-08-29 01:59:34,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:59:34,320 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-29 01:59:34,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-29 01:59:34,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-29 01:59:34,322 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:59:34,322 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:59:34,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-29 01:59:34,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 01:59:34,535 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:59:34,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:59:34,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-08-29 01:59:34,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 01:59:34,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630354034] [2021-08-29 01:59:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:59:34,537 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 01:59:34,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 01:59:34,542 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 01:59:34,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-29 01:59:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:59:34,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-29 01:59:34,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:59:34,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:34,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:34,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:34,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:34,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:34,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:34,930 INFO L354 Elim1Store]: treesize reduction 152, result has 24.0 percent of original size [2021-08-29 01:59:34,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 68 [2021-08-29 01:59:35,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:35,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:35,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:35,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 01:59:35,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 65 [2021-08-29 01:59:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:59:35,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:59:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:59:36,094 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 01:59:36,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630354034] [2021-08-29 01:59:36,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630354034] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 01:59:36,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:59:36,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-08-29 01:59:36,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098676599] [2021-08-29 01:59:36,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 01:59:36,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 01:59:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 01:59:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-29 01:59:36,105 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:38,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:59:38,690 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-08-29 01:59:38,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 01:59:38,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-29 01:59:38,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:59:38,699 INFO L225 Difference]: With dead ends: 35 [2021-08-29 01:59:38,699 INFO L226 Difference]: Without dead ends: 33 [2021-08-29 01:59:38,700 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1004.75ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-29 01:59:38,700 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2018.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.07ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2230.87ms IncrementalHoareTripleChecker+Time [2021-08-29 01:59:38,701 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 133 Unknown, 0 Unchecked, 3.07ms Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 2230.87ms Time] [2021-08-29 01:59:38,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-29 01:59:38,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-08-29 01:59:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:38,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-29 01:59:38,707 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-08-29 01:59:38,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:59:38,707 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-29 01:59:38,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:38,708 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-29 01:59:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 01:59:38,708 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:59:38,709 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:59:38,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-29 01:59:38,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 01:59:38,921 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:59:38,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:59:38,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-08-29 01:59:38,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 01:59:38,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773303221] [2021-08-29 01:59:38,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:59:38,923 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 01:59:38,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 01:59:38,924 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 01:59:38,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-29 01:59:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:59:39,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-29 01:59:39,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:59:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:59:39,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:59:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:59:39,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 01:59:39,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773303221] [2021-08-29 01:59:39,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773303221] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 01:59:39,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:59:39,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-08-29 01:59:39,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811765832] [2021-08-29 01:59:39,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 01:59:39,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 01:59:39,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 01:59:39,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-29 01:59:39,328 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:39,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:59:39,929 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-08-29 01:59:39,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 01:59:39,937 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-29 01:59:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:59:39,941 INFO L225 Difference]: With dead ends: 43 [2021-08-29 01:59:39,941 INFO L226 Difference]: Without dead ends: 34 [2021-08-29 01:59:39,942 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 344.86ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-08-29 01:59:39,943 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 296.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.06ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 357.54ms IncrementalHoareTripleChecker+Time [2021-08-29 01:59:39,943 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 130 Unknown, 0 Unchecked, 3.06ms Time], IncrementalHoareTripleChecker [22 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 357.54ms Time] [2021-08-29 01:59:39,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-29 01:59:39,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2021-08-29 01:59:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-29 01:59:39,951 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-08-29 01:59:39,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:59:39,951 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-29 01:59:39,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:39,951 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-29 01:59:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 01:59:39,952 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:59:39,952 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:59:39,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-29 01:59:40,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 01:59:40,169 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:59:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:59:40,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-08-29 01:59:40,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 01:59:40,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624691914] [2021-08-29 01:59:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:59:40,170 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 01:59:40,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 01:59:40,171 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 01:59:40,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-29 01:59:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:59:40,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 01:59:40,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:59:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:59:40,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:59:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:59:40,717 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 01:59:40,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624691914] [2021-08-29 01:59:40,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624691914] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 01:59:40,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 01:59:40,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-29 01:59:40,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427068566] [2021-08-29 01:59:40,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-29 01:59:40,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 01:59:40,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-29 01:59:40,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-29 01:59:40,720 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:41,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:59:41,628 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-08-29 01:59:41,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-29 01:59:41,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-29 01:59:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:59:41,629 INFO L225 Difference]: With dead ends: 58 [2021-08-29 01:59:41,629 INFO L226 Difference]: Without dead ends: 49 [2021-08-29 01:59:41,630 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 634.90ms TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-08-29 01:59:41,631 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 112 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 414.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.36ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 494.22ms IncrementalHoareTripleChecker+Time [2021-08-29 01:59:41,631 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 0 Invalid, 196 Unknown, 0 Unchecked, 3.36ms Time], IncrementalHoareTripleChecker [51 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 494.22ms Time] [2021-08-29 01:59:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-29 01:59:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2021-08-29 01:59:41,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-08-29 01:59:41,637 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 14 [2021-08-29 01:59:41,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:59:41,638 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-08-29 01:59:41,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:41,638 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-08-29 01:59:41,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 01:59:41,639 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:59:41,639 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:59:41,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-08-29 01:59:41,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 01:59:41,850 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:59:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:59:41,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-08-29 01:59:41,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 01:59:41,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777919905] [2021-08-29 01:59:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:59:41,851 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 01:59:41,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 01:59:41,852 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 01:59:41,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-29 01:59:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:59:42,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-29 01:59:42,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:59:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:59:42,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:59:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:59:42,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 01:59:42,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777919905] [2021-08-29 01:59:42,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777919905] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 01:59:42,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 01:59:42,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-29 01:59:42,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820686379] [2021-08-29 01:59:42,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-29 01:59:42,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 01:59:42,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-29 01:59:42,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-29 01:59:42,545 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:43,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:59:43,069 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-08-29 01:59:43,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 01:59:43,077 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-29 01:59:43,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:59:43,077 INFO L225 Difference]: With dead ends: 41 [2021-08-29 01:59:43,077 INFO L226 Difference]: Without dead ends: 27 [2021-08-29 01:59:43,078 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 328.00ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-29 01:59:43,079 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 282.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 331.11ms IncrementalHoareTripleChecker+Time [2021-08-29 01:59:43,079 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [27 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 331.11ms Time] [2021-08-29 01:59:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-29 01:59:43,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-08-29 01:59:43,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-08-29 01:59:43,083 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-08-29 01:59:43,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:59:43,084 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-08-29 01:59:43,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-08-29 01:59:43,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 01:59:43,084 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:59:43,085 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:59:43,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-29 01:59:43,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 01:59:43,296 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:59:43,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:59:43,296 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-08-29 01:59:43,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 01:59:43,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602864122] [2021-08-29 01:59:43,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:59:43,297 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 01:59:43,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 01:59:43,298 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 01:59:43,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-29 01:59:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:59:43,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-29 01:59:43,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:59:43,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-08-29 01:59:43,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:43,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:43,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:43,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:43,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:43,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:43,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:43,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2021-08-29 01:59:43,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:43,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:43,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:43,909 INFO L354 Elim1Store]: treesize reduction 883, result has 10.4 percent of original size [2021-08-29 01:59:43,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 132 treesize of output 141 [2021-08-29 01:59:44,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:44,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:44,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:44,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:44,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:44,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:45,168 INFO L354 Elim1Store]: treesize reduction 1444, result has 3.5 percent of original size [2021-08-29 01:59:45,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 70 case distinctions, treesize of input 290 treesize of output 247 [2021-08-29 01:59:47,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:47,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:47,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:47,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:47,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:47,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:47,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:47,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:47,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:47,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:47,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:48,358 INFO L354 Elim1Store]: treesize reduction 1186, result has 6.2 percent of original size [2021-08-29 01:59:48,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 6 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 363 treesize of output 203 [2021-08-29 01:59:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:59:48,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:59:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:59:54,141 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 01:59:54,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602864122] [2021-08-29 01:59:54,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602864122] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 01:59:54,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 01:59:54,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-29 01:59:54,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112019242] [2021-08-29 01:59:54,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 01:59:54,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 01:59:54,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 01:59:54,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=117, Unknown=2, NotChecked=0, Total=156 [2021-08-29 01:59:54,142 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:55,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:59:55,983 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-08-29 01:59:55,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-29 01:59:55,993 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-29 01:59:55,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:59:55,993 INFO L225 Difference]: With dead ends: 43 [2021-08-29 01:59:55,993 INFO L226 Difference]: Without dead ends: 41 [2021-08-29 01:59:55,993 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 6265.97ms TimeCoverageRelationStatistics Valid=50, Invalid=158, Unknown=2, NotChecked=0, Total=210 [2021-08-29 01:59:55,994 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1312.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.95ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 1431.83ms IncrementalHoareTripleChecker+Time [2021-08-29 01:59:55,994 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 89 Unknown, 0 Unchecked, 0.95ms Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 26 Unchecked, 1431.83ms Time] [2021-08-29 01:59:55,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-29 01:59:55,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-08-29 01:59:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-08-29 01:59:55,998 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 16 [2021-08-29 01:59:55,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:59:55,999 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-08-29 01:59:55,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:59:55,999 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-08-29 01:59:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 01:59:55,999 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:59:55,999 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:59:56,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-29 01:59:56,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 01:59:56,200 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:59:56,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:59:56,213 INFO L82 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-08-29 01:59:56,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 01:59:56,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834558237] [2021-08-29 01:59:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:59:56,213 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 01:59:56,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 01:59:56,214 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 01:59:56,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-29 01:59:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:59:56,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-29 01:59:56,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:59:56,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-08-29 01:59:56,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:56,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2021-08-29 01:59:56,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:56,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:56,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:56,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:56,920 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-08-29 01:59:56,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 138 treesize of output 127 [2021-08-29 01:59:57,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:57,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:57,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:57,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:57,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:57,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:57,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:57,244 INFO L354 Elim1Store]: treesize reduction 132, result has 15.9 percent of original size [2021-08-29 01:59:57,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 47 case distinctions, treesize of input 278 treesize of output 201 [2021-08-29 01:59:57,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:57,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:57,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:57,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:59:57,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 01:59:57,911 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-08-29 01:59:57,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 6 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 371 treesize of output 141 [2021-08-29 01:59:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:59:57,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:00:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:00:02,628 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 02:00:02,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834558237] [2021-08-29 02:00:02,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834558237] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:00:02,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 02:00:02,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-29 02:00:02,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368981308] [2021-08-29 02:00:02,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-29 02:00:02,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 02:00:02,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-29 02:00:02,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-29 02:00:02,630 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:00:06,457 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:00:08,513 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 02:00:15,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:00:15,604 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-08-29 02:00:15,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-29 02:00:15,621 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-29 02:00:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:00:15,622 INFO L225 Difference]: With dead ends: 51 [2021-08-29 02:00:15,622 INFO L226 Difference]: Without dead ends: 49 [2021-08-29 02:00:15,622 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 8472.42ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-08-29 02:00:15,623 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8302.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.80ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 8789.59ms IncrementalHoareTripleChecker+Time [2021-08-29 02:00:15,623 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 207 Unknown, 0 Unchecked, 2.80ms Time], IncrementalHoareTripleChecker [12 Valid, 150 Invalid, 1 Unknown, 44 Unchecked, 8789.59ms Time] [2021-08-29 02:00:15,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-29 02:00:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2021-08-29 02:00:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:00:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-08-29 02:00:15,639 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 20 [2021-08-29 02:00:15,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:00:15,639 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-08-29 02:00:15,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:00:15,639 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-08-29 02:00:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 02:00:15,640 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:00:15,641 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:00:15,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-29 02:00:15,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 02:00:15,861 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:00:15,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:00:15,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 2 times [2021-08-29 02:00:15,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 02:00:15,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825911119] [2021-08-29 02:00:15,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 02:00:15,862 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 02:00:15,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 02:00:15,865 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-29 02:00:15,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-08-29 02:00:16,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 02:00:16,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 02:00:16,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-29 02:00:16,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:00:16,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-08-29 02:00:16,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:00:16,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:00:16,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:00:16,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:00:16,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:00:16,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:00:16,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 02:00:16,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2021-08-29 02:00:16,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:00:16,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:00:16,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 02:00:16,890 INFO L354 Elim1Store]: treesize reduction 883, result has 10.4 percent of original size [2021-08-29 02:00:16,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 132 treesize of output 141 [2021-08-29 02:00:17,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:00:17,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 02:01:10,849 WARN L210 SmtUtils]: Spent 53.49s on a formula simplification. DAG size of input: 248 DAG size of output: 104 [2021-08-29 02:01:10,851 INFO L354 Elim1Store]: treesize reduction 1365, result has 19.5 percent of original size [2021-08-29 02:01:10,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 237 treesize of output 417 [2021-08-29 02:05:13,782 WARN L228 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-08-29 02:05:13,783 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 02:05:13,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825911119] [2021-08-29 02:05:13,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-08-29 02:05:13,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [732797434] [2021-08-29 02:05:13,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 02:05:13,784 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-29 02:05:13,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-29 02:05:13,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-08-29 02:05:13,786 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-29 02:05:13,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-08-29 02:05:14,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 02:05:14,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146173113] [2021-08-29 02:05:14,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 02:05:14,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:05:14,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:05:14,183 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) [2021-08-29 02:05:14,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 1 [2021-08-29 02:05:14,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-29 02:05:14,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 02:05:14,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 02:05:14,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-29 02:05:14,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:05:14,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-08-29 02:05:14,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-29 02:05:14,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-29 02:05:14,339 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-29 02:05:14,339 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-08-29 02:05:14,342 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 02:05:14,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-29 02:05:14,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-08-29 02:05:14,744 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,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 02:05:14,748 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 02:05:14,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 02:05:14 BoogieIcfgContainer [2021-08-29 02:05:14,762 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 02:05:14,762 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 02:05:14,762 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 02:05:14,763 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 02:05:14,763 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 01:59:33" (3/4) ... [2021-08-29 02:05:14,765 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-29 02:05:14,765 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 02:05:14,766 INFO L158 Benchmark]: Toolchain (without parser) took 341649.58ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 35.1MB in the beginning and 16.6MB in the end (delta: 18.5MB). Peak memory consumption was 32.1MB. Max. memory is 16.1GB. [2021-08-29 02:05:14,766 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 56.6MB. Free memory was 37.3MB in the beginning and 37.3MB in the end (delta: 36.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 02:05:14,766 INFO L158 Benchmark]: CACSL2BoogieTranslator took 248.36ms. Allocated memory is still 56.6MB. Free memory was 34.9MB in the beginning and 38.8MB in the end (delta: -3.9MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2021-08-29 02:05:14,767 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.02ms. Allocated memory is still 56.6MB. Free memory was 38.8MB in the beginning and 37.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 02:05:14,767 INFO L158 Benchmark]: Boogie Preprocessor took 43.81ms. Allocated memory is still 56.6MB. Free memory was 37.1MB in the beginning and 35.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 02:05:14,767 INFO L158 Benchmark]: RCFGBuilder took 259.92ms. Allocated memory is still 56.6MB. Free memory was 35.6MB in the beginning and 38.3MB in the end (delta: -2.6MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. [2021-08-29 02:05:14,768 INFO L158 Benchmark]: TraceAbstraction took 341049.37ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 37.7MB in the beginning and 16.6MB in the end (delta: 21.1MB). Peak memory consumption was 35.9MB. Max. memory is 16.1GB. [2021-08-29 02:05:14,768 INFO L158 Benchmark]: Witness Printer took 3.26ms. Allocated memory is still 71.3MB. Free memory is still 16.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 02:05:14,769 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 56.6MB. Free memory was 37.3MB in the beginning and 37.3MB in the end (delta: 36.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 248.36ms. Allocated memory is still 56.6MB. Free memory was 34.9MB in the beginning and 38.8MB in the end (delta: -3.9MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.02ms. Allocated memory is still 56.6MB. Free memory was 38.8MB in the beginning and 37.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 43.81ms. Allocated memory is still 56.6MB. Free memory was 37.1MB in the beginning and 35.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 259.92ms. Allocated memory is still 56.6MB. Free memory was 35.6MB in the beginning and 38.3MB in the end (delta: -2.6MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. * TraceAbstraction took 341049.37ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 37.7MB in the beginning and 16.6MB in the end (delta: 21.1MB). Peak memory consumption was 35.9MB. Max. memory is 16.1GB. * Witness Printer took 3.26ms. Allocated memory is still 71.3MB. Free memory is still 16.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 10 [L32] b[0] = 1 [L33] i=1 [L33] COND TRUE i