./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/list-ext2-properties/simple_and_skiplist_2lvl-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c1a138e29c49fa76f78aea6f0cc9f2f633faceb2 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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/list-ext2-properties/simple_and_skiplist_2lvl-2.i -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 c1a138e29c49fa76f78aea6f0cc9f2f633faceb2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:26:59,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:26:59,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:26:59,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:26:59,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:26:59,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:26:59,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:26:59,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:26:59,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:26:59,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:26:59,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:26:59,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:26:59,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:26:59,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:26:59,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:26:59,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:26:59,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:26:59,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:26:59,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:26:59,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:26:59,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:26:59,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:26:59,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:26:59,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:26:59,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:26:59,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:26:59,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:26:59,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:26:59,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:26:59,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:26:59,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:26:59,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:26:59,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:26:59,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:26:59,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:26:59,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:26:59,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:26:59,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:26:59,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:26:59,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:26:59,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:26:59,580 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 02:26:59,600 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:26:59,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:26:59,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:26:59,600 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:26:59,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:26:59,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:26:59,602 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:26:59,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:26:59,602 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:26:59,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 02:26:59,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:26:59,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:26:59,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:26:59,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:26:59,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:26:59,603 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:26:59,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:26:59,603 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:26:59,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:26:59,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:26:59,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:26:59,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:26:59,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:26:59,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:26:59,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:26:59,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:26:59,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 02:26:59,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 02:26:59,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:26:59,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:26:59,605 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1a138e29c49fa76f78aea6f0cc9f2f633faceb2 [2021-08-26 02:26:59,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:26:59,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:26:59,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:26:59,964 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:26:59,966 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:26:59,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2021-08-26 02:27:00,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/952a2b5ae/1b5debcbacbf44d79fb237a0f896bf1d/FLAG3762763b8 [2021-08-26 02:27:00,564 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:27:00,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2021-08-26 02:27:00,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/952a2b5ae/1b5debcbacbf44d79fb237a0f896bf1d/FLAG3762763b8 [2021-08-26 02:27:01,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/952a2b5ae/1b5debcbacbf44d79fb237a0f896bf1d [2021-08-26 02:27:01,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:27:01,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:27:01,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:27:01,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:27:01,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:27:01,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:27:01" (1/1) ... [2021-08-26 02:27:01,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b458beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:27:01, skipping insertion in model container [2021-08-26 02:27:01,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:27:01" (1/1) ... [2021-08-26 02:27:01,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:27:01,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:27:01,352 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/list-ext2-properties/simple_and_skiplist_2lvl-2.i[24020,24033] [2021-08-26 02:27:01,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:27:01,367 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:27:01,421 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/list-ext2-properties/simple_and_skiplist_2lvl-2.i[24020,24033] [2021-08-26 02:27:01,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:27:01,445 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:27:01,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:27:01 WrapperNode [2021-08-26 02:27:01,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:27:01,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:27:01,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:27:01,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:27:01,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:27:01" (1/1) ... [2021-08-26 02:27:01,466 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:27:01" (1/1) ... [2021-08-26 02:27:01,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:27:01,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:27:01,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:27:01,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:27:01,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:27:01" (1/1) ... [2021-08-26 02:27:01,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:27:01" (1/1) ... [2021-08-26 02:27:01,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:27:01" (1/1) ... [2021-08-26 02:27:01,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:27:01" (1/1) ... [2021-08-26 02:27:01,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:27:01" (1/1) ... [2021-08-26 02:27:01,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:27:01" (1/1) ... [2021-08-26 02:27:01,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:27:01" (1/1) ... [2021-08-26 02:27:01,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:27:01,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:27:01,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:27:01,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:27:01,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:27:01" (1/1) ... [2021-08-26 02:27:01,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:27:01,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:01,554 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) [2021-08-26 02:27:01,561 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 [2021-08-26 02:27:01,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 02:27:01,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 02:27:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:27:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:27:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:27:01,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:27:01,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:27:01,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 02:27:01,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:27:01,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:27:02,187 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:27:02,188 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-08-26 02:27:02,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:27:02 BoogieIcfgContainer [2021-08-26 02:27:02,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:27:02,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:27:02,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:27:02,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:27:02,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:27:01" (1/3) ... [2021-08-26 02:27:02,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51dab8e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:27:02, skipping insertion in model container [2021-08-26 02:27:02,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:27:01" (2/3) ... [2021-08-26 02:27:02,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51dab8e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:27:02, skipping insertion in model container [2021-08-26 02:27:02,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:27:02" (3/3) ... [2021-08-26 02:27:02,198 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-2.i [2021-08-26 02:27:02,204 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:27:02,204 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 02:27:02,256 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:27:02,263 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 [2021-08-26 02:27:02,264 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 02:27:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 36 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:02,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 02:27:02,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:02,283 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:02,284 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:27:02,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:02,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2114193284, now seen corresponding path program 1 times [2021-08-26 02:27:02,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:02,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142340263] [2021-08-26 02:27:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:02,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:02,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:02,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142340263] [2021-08-26 02:27:02,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142340263] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:27:02,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:27:02,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 02:27:02,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795184367] [2021-08-26 02:27:02,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 02:27:02,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:02,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 02:27:02,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:27:02,474 INFO L87 Difference]: Start difference. First operand has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 36 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-08-26 02:27:02,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:02,493 INFO L93 Difference]: Finished difference Result 64 states and 94 transitions. [2021-08-26 02:27:02,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:27:02,495 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-08-26 02:27:02,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:02,501 INFO L225 Difference]: With dead ends: 64 [2021-08-26 02:27:02,501 INFO L226 Difference]: Without dead ends: 14 [2021-08-26 02:27:02,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:27:02,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-26 02:27:02,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-26 02:27:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2021-08-26 02:27:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-08-26 02:27:02,532 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2021-08-26 02:27:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:02,533 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-08-26 02:27:02,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-08-26 02:27:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-08-26 02:27:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 02:27:02,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:02,534 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:02,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 02:27:02,535 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:27:02,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:02,537 INFO L82 PathProgramCache]: Analyzing trace with hash 672844787, now seen corresponding path program 1 times [2021-08-26 02:27:02,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:02,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168602750] [2021-08-26 02:27:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:02,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:02,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:02,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168602750] [2021-08-26 02:27:02,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168602750] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:27:02,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:27:02,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 02:27:02,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197434507] [2021-08-26 02:27:02,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:27:02,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:02,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:27:02,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:27:02,707 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-08-26 02:27:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:02,776 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-08-26 02:27:02,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:27:02,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2021-08-26 02:27:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:02,778 INFO L225 Difference]: With dead ends: 29 [2021-08-26 02:27:02,778 INFO L226 Difference]: Without dead ends: 27 [2021-08-26 02:27:02,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:27:02,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-26 02:27:02,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-08-26 02:27:02,783 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) [2021-08-26 02:27:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-26 02:27:02,789 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2021-08-26 02:27:02,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:02,790 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-26 02:27:02,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-08-26 02:27:02,790 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-26 02:27:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 02:27:02,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:02,792 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:02,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 02:27:02,793 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:27:02,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:02,801 INFO L82 PathProgramCache]: Analyzing trace with hash 111486456, now seen corresponding path program 1 times [2021-08-26 02:27:02,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:02,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402949599] [2021-08-26 02:27:02,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:02,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:02,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:02,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402949599] [2021-08-26 02:27:02,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402949599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:02,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7706033] [2021-08-26 02:27:02,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:02,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:02,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:02,981 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) [2021-08-26 02:27:03,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 02:27:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:03,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 02:27:03,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:03,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:03,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:03,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-08-26 02:27:03,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-08-26 02:27:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:03,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7706033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:03,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:03,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-26 02:27:03,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284932852] [2021-08-26 02:27:03,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 02:27:03,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:03,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 02:27:03,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:27:03,369 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-08-26 02:27:03,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:03,465 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-08-26 02:27:03,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:27:03,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2021-08-26 02:27:03,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:03,467 INFO L225 Difference]: With dead ends: 33 [2021-08-26 02:27:03,467 INFO L226 Difference]: Without dead ends: 23 [2021-08-26 02:27:03,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-26 02:27:03,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-26 02:27:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2021-08-26 02:27:03,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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) [2021-08-26 02:27:03,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-08-26 02:27:03,475 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2021-08-26 02:27:03,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:03,476 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-08-26 02:27:03,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-08-26 02:27:03,480 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-08-26 02:27:03,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 02:27:03,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:03,481 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:03,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 02:27:03,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:03,697 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:27:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:03,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1682540518, now seen corresponding path program 1 times [2021-08-26 02:27:03,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:03,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717957638] [2021-08-26 02:27:03,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:03,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:03,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:03,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717957638] [2021-08-26 02:27:03,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717957638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:03,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066310849] [2021-08-26 02:27:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:03,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:03,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:03,827 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) [2021-08-26 02:27:03,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 02:27:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:03,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 02:27:03,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:03,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:27:04,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:04,080 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:27:04,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-26 02:27:04,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:04,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-08-26 02:27:04,261 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-08-26 02:27:04,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 22 [2021-08-26 02:27:04,344 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:27:04,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-08-26 02:27:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:04,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066310849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:04,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:04,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-26 02:27:04,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024521744] [2021-08-26 02:27:04,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 02:27:04,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:04,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 02:27:04,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-26 02:27:04,354 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:04,587 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-08-26 02:27:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 02:27:04,588 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-26 02:27:04,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:04,588 INFO L225 Difference]: With dead ends: 33 [2021-08-26 02:27:04,588 INFO L226 Difference]: Without dead ends: 31 [2021-08-26 02:27:04,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-08-26 02:27:04,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-26 02:27:04,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-08-26 02:27:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-08-26 02:27:04,596 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2021-08-26 02:27:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:04,597 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-08-26 02:27:04,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-08-26 02:27:04,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 02:27:04,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:04,601 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:04,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 02:27:04,816 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,SelfDestructingSolverStorable3 [2021-08-26 02:27:04,817 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:27:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:04,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2003547249, now seen corresponding path program 1 times [2021-08-26 02:27:04,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:04,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844540552] [2021-08-26 02:27:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:04,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:05,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:05,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844540552] [2021-08-26 02:27:05,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844540552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:05,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534737930] [2021-08-26 02:27:05,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:05,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:05,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:05,033 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) [2021-08-26 02:27:05,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 02:27:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:05,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-26 02:27:05,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:05,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:27:05,219 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:27:05,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-26 02:27:05,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-26 02:27:05,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:05,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 88 [2021-08-26 02:27:05,400 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:27:05,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 73 [2021-08-26 02:27:05,406 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 0 case distinctions, treesize of input 103 treesize of output 84 [2021-08-26 02:27:05,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 60 [2021-08-26 02:27:05,421 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:27:05,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 52 [2021-08-26 02:27:05,527 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:27:05,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 42 [2021-08-26 02:27:05,534 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:27:05,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-08-26 02:27:05,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-26 02:27:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:05,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534737930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:05,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:05,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-26 02:27:05,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472231008] [2021-08-26 02:27:05,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 02:27:05,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:05,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 02:27:05,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-26 02:27:05,572 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-08-26 02:27:05,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:05,757 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-08-26 02:27:05,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 02:27:05,757 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) Word has length 17 [2021-08-26 02:27:05,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:05,758 INFO L225 Difference]: With dead ends: 36 [2021-08-26 02:27:05,758 INFO L226 Difference]: Without dead ends: 34 [2021-08-26 02:27:05,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-26 02:27:05,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-26 02:27:05,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2021-08-26 02:27:05,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 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) [2021-08-26 02:27:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-08-26 02:27:05,762 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2021-08-26 02:27:05,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:05,762 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-08-26 02:27:05,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-08-26 02:27:05,762 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-08-26 02:27:05,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 02:27:05,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:05,763 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:05,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 02:27:05,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:05,977 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:27:05,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:05,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1136769217, now seen corresponding path program 2 times [2021-08-26 02:27:05,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:05,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639825318] [2021-08-26 02:27:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:05,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:06,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:06,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639825318] [2021-08-26 02:27:06,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639825318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:06,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509560624] [2021-08-26 02:27:06,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:27:06,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:06,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:06,185 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) [2021-08-26 02:27:06,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 02:27:06,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:27:06,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:27:06,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-26 02:27:06,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:06,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:27:06,442 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:27:06,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:27:06,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:06,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:06,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-08-26 02:27:06,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-08-26 02:27:06,621 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-26 02:27:06,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-08-26 02:27:06,730 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-26 02:27:06,730 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 3 case distinctions, treesize of input 42 treesize of output 29 [2021-08-26 02:27:06,913 INFO L354 Elim1Store]: treesize reduction 170, result has 11.5 percent of original size [2021-08-26 02:27:06,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 40 [2021-08-26 02:27:07,012 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-26 02:27:07,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-08-26 02:27:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:07,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509560624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:07,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:07,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-26 02:27:07,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031750655] [2021-08-26 02:27:07,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 02:27:07,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:07,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 02:27:07,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-26 02:27:07,022 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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) [2021-08-26 02:27:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:11,448 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-08-26 02:27:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 02:27:11,448 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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) Word has length 18 [2021-08-26 02:27:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:11,450 INFO L225 Difference]: With dead ends: 51 [2021-08-26 02:27:11,450 INFO L226 Difference]: Without dead ends: 49 [2021-08-26 02:27:11,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 403.7ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-08-26 02:27:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-26 02:27:11,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-08-26 02:27:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 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) [2021-08-26 02:27:11,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-08-26 02:27:11,456 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 18 [2021-08-26 02:27:11,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:11,456 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-08-26 02:27:11,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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) [2021-08-26 02:27:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-08-26 02:27:11,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 02:27:11,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:11,458 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:11,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-26 02:27:11,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:11,659 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:27:11,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:11,659 INFO L82 PathProgramCache]: Analyzing trace with hash 520389818, now seen corresponding path program 2 times [2021-08-26 02:27:11,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:11,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540964594] [2021-08-26 02:27:11,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:11,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:11,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:11,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540964594] [2021-08-26 02:27:11,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540964594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:11,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693651131] [2021-08-26 02:27:11,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:27:11,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:11,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:11,853 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) [2021-08-26 02:27:11,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 02:27:12,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:27:12,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:27:12,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-26 02:27:12,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:12,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:27:12,124 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:27:12,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-26 02:27:12,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-26 02:27:12,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:12,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 70 [2021-08-26 02:27:12,256 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:27:12,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 55 [2021-08-26 02:27:12,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 49 [2021-08-26 02:27:12,269 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:27:12,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 41 [2021-08-26 02:27:12,482 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-26 02:27:12,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 44 [2021-08-26 02:27:12,500 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-26 02:27:12,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 25 [2021-08-26 02:27:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:12,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693651131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:12,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:12,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-26 02:27:12,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614694285] [2021-08-26 02:27:12,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 02:27:12,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:12,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 02:27:12,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-26 02:27:12,515 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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) [2021-08-26 02:27:13,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:13,713 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-08-26 02:27:13,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 02:27:13,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 20 [2021-08-26 02:27:13,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:13,714 INFO L225 Difference]: With dead ends: 49 [2021-08-26 02:27:13,714 INFO L226 Difference]: Without dead ends: 36 [2021-08-26 02:27:13,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-26 02:27:13,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-26 02:27:13,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2021-08-26 02:27:13,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 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) [2021-08-26 02:27:13,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-08-26 02:27:13,719 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 20 [2021-08-26 02:27:13,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:13,719 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-08-26 02:27:13,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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) [2021-08-26 02:27:13,719 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-08-26 02:27:13,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 02:27:13,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:13,720 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:13,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 02:27:13,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:13,921 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:27:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:13,921 INFO L82 PathProgramCache]: Analyzing trace with hash -320577942, now seen corresponding path program 3 times [2021-08-26 02:27:13,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:13,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718495249] [2021-08-26 02:27:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:13,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:14,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:14,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718495249] [2021-08-26 02:27:14,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718495249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:14,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812208434] [2021-08-26 02:27:14,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:27:14,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:14,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:14,210 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) [2021-08-26 02:27:14,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 02:27:14,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 02:27:14,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:27:14,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-26 02:27:14,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:14,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:27:14,511 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:27:14,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:27:14,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:14,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-26 02:27:14,673 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:14,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:27:14,705 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-26 02:27:14,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-08-26 02:27:14,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:27:14,811 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:27:14,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 94 [2021-08-26 02:27:14,827 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:27:14,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 92 [2021-08-26 02:27:14,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 82 [2021-08-26 02:27:14,980 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-08-26 02:27:14,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 229 treesize of output 117 [2021-08-26 02:27:15,009 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-08-26 02:27:15,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 190 treesize of output 102 [2021-08-26 02:27:15,044 INFO L354 Elim1Store]: treesize reduction 128, result has 15.2 percent of original size [2021-08-26 02:27:15,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 145 [2021-08-26 02:27:15,069 INFO L354 Elim1Store]: treesize reduction 184, result has 12.8 percent of original size [2021-08-26 02:27:15,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 99 [2021-08-26 02:27:15,223 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-08-26 02:27:15,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 62 [2021-08-26 02:27:15,232 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-26 02:27:15,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 36 [2021-08-26 02:27:15,288 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:27:15,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-08-26 02:27:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:15,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812208434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:15,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:15,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-26 02:27:15,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780571413] [2021-08-26 02:27:15,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 02:27:15,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:15,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 02:27:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-26 02:27:15,297 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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) [2021-08-26 02:27:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:15,642 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-08-26 02:27:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 02:27:15,644 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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) Word has length 21 [2021-08-26 02:27:15,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:15,646 INFO L225 Difference]: With dead ends: 45 [2021-08-26 02:27:15,646 INFO L226 Difference]: Without dead ends: 43 [2021-08-26 02:27:15,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-26 02:27:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-26 02:27:15,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-08-26 02:27:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:15,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-08-26 02:27:15,659 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 21 [2021-08-26 02:27:15,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:15,659 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-08-26 02:27:15,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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) [2021-08-26 02:27:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-08-26 02:27:15,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 02:27:15,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:15,660 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:15,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 02:27:15,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:15,877 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:27:15,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:15,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1674603553, now seen corresponding path program 4 times [2021-08-26 02:27:15,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:15,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858856734] [2021-08-26 02:27:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:15,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:16,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:16,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858856734] [2021-08-26 02:27:16,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858856734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:16,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340511380] [2021-08-26 02:27:16,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:27:16,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:16,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:16,217 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) [2021-08-26 02:27:16,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 02:27:16,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:27:16,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:27:16,490 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-26 02:27:16,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:16,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:27:16,587 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:27:16,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:27:16,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:16,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-26 02:27:16,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:27:16,734 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-26 02:27:16,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-08-26 02:27:16,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:27:16,838 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:27:16,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 62 [2021-08-26 02:27:16,849 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:27:16,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 80 [2021-08-26 02:27:16,979 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-26 02:27:16,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 149 [2021-08-26 02:27:17,008 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-26 02:27:17,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 235 treesize of output 126 [2021-08-26 02:27:17,023 INFO L354 Elim1Store]: treesize reduction 91, result has 20.2 percent of original size [2021-08-26 02:27:17,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 176 [2021-08-26 02:27:17,060 INFO L354 Elim1Store]: treesize reduction 252, result has 11.9 percent of original size [2021-08-26 02:27:17,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 132 treesize of output 120 [2021-08-26 02:27:17,350 INFO L354 Elim1Store]: treesize reduction 75, result has 9.6 percent of original size [2021-08-26 02:27:17,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 143 treesize of output 81 [2021-08-26 02:27:17,367 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-08-26 02:27:17,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 42 [2021-08-26 02:27:17,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-26 02:27:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:17,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340511380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:17,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:17,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-08-26 02:27:17,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593998696] [2021-08-26 02:27:17,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 02:27:17,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:17,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 02:27:17,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-26 02:27:17,400 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:17,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:17,921 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-08-26 02:27:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 02:27:17,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-26 02:27:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:17,922 INFO L225 Difference]: With dead ends: 48 [2021-08-26 02:27:17,922 INFO L226 Difference]: Without dead ends: 46 [2021-08-26 02:27:17,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 529.1ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-08-26 02:27:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-26 02:27:17,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2021-08-26 02:27:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-08-26 02:27:17,927 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2021-08-26 02:27:17,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:17,928 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-08-26 02:27:17,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:17,929 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-08-26 02:27:17,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 02:27:17,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:17,930 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:17,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-26 02:27:18,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:18,131 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:27:18,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:18,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1100309475, now seen corresponding path program 5 times [2021-08-26 02:27:18,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:18,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626270841] [2021-08-26 02:27:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:18,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:18,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:18,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626270841] [2021-08-26 02:27:18,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626270841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:18,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727524033] [2021-08-26 02:27:18,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 02:27:18,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:18,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:18,561 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) [2021-08-26 02:27:18,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 02:27:18,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-26 02:27:18,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:27:18,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-26 02:27:18,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:18,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:27:19,041 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:27:19,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:27:19,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:19,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-26 02:27:19,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:27:19,180 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:19,225 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:27:19,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 33 [2021-08-26 02:27:19,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:27:19,382 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:27:19,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 94 [2021-08-26 02:27:19,395 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:27:19,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 140 [2021-08-26 02:27:19,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 113 [2021-08-26 02:27:19,558 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-08-26 02:27:19,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 103 [2021-08-26 02:27:19,580 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-08-26 02:27:19,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 97 [2021-08-26 02:27:19,611 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-08-26 02:27:19,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 90 [2021-08-26 02:27:19,633 INFO L354 Elim1Store]: treesize reduction 44, result has 27.9 percent of original size [2021-08-26 02:27:19,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 91 [2021-08-26 02:27:19,804 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-08-26 02:27:19,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 205 treesize of output 109 [2021-08-26 02:27:19,826 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-08-26 02:27:19,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 208 [2021-08-26 02:27:19,833 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-26 02:27:19,833 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 187 treesize of output 154 [2021-08-26 02:27:20,054 INFO L354 Elim1Store]: treesize reduction 108, result has 16.9 percent of original size [2021-08-26 02:27:20,055 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 339 treesize of output 145 [2021-08-26 02:27:20,099 INFO L354 Elim1Store]: treesize reduction 108, result has 16.9 percent of original size [2021-08-26 02:27:20,099 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 288 treesize of output 130 [2021-08-26 02:27:20,149 INFO L354 Elim1Store]: treesize reduction 430, result has 9.7 percent of original size [2021-08-26 02:27:20,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 272 treesize of output 239 [2021-08-26 02:27:20,193 INFO L354 Elim1Store]: treesize reduction 312, result has 10.9 percent of original size [2021-08-26 02:27:20,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 185 treesize of output 191 [2021-08-26 02:27:20,422 INFO L354 Elim1Store]: treesize reduction 54, result has 19.4 percent of original size [2021-08-26 02:27:20,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 180 treesize of output 91 [2021-08-26 02:27:20,434 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-26 02:27:20,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 58 [2021-08-26 02:27:20,542 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-26 02:27:20,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-08-26 02:27:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:20,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727524033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:20,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:20,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-26 02:27:20,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795537607] [2021-08-26 02:27:20,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 02:27:20,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:20,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 02:27:20,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-26 02:27:20,553 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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) [2021-08-26 02:27:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:23,249 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-08-26 02:27:23,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-26 02:27:23,251 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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) Word has length 25 [2021-08-26 02:27:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:23,251 INFO L225 Difference]: With dead ends: 59 [2021-08-26 02:27:23,251 INFO L226 Difference]: Without dead ends: 57 [2021-08-26 02:27:23,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 822.1ms TimeCoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-08-26 02:27:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-26 02:27:23,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 39. [2021-08-26 02:27:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 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) [2021-08-26 02:27:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-08-26 02:27:23,258 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 25 [2021-08-26 02:27:23,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:23,259 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-08-26 02:27:23,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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) [2021-08-26 02:27:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-08-26 02:27:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-26 02:27:23,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:23,260 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:23,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-26 02:27:23,464 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,SelfDestructingSolverStorable9 [2021-08-26 02:27:23,465 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:27:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:23,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1093798001, now seen corresponding path program 3 times [2021-08-26 02:27:23,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:23,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874905267] [2021-08-26 02:27:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:23,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 02:27:23,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:23,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874905267] [2021-08-26 02:27:23,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874905267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:23,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143497618] [2021-08-26 02:27:23,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:27:23,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:23,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:23,681 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) [2021-08-26 02:27:23,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 02:27:24,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-26 02:27:24,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:27:24,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-26 02:27:24,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:24,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:27:24,276 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:27:24,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:27:24,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:24,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:24,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-08-26 02:27:24,444 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:27:24,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 33 [2021-08-26 02:27:24,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-08-26 02:27:24,574 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-26 02:27:24,574 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 3 case distinctions, treesize of input 47 treesize of output 34 [2021-08-26 02:27:24,700 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-26 02:27:24,701 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 2 case distinctions, treesize of input 54 treesize of output 56 [2021-08-26 02:27:24,721 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-08-26 02:27:24,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 50 treesize of output 54 [2021-08-26 02:27:24,887 INFO L354 Elim1Store]: treesize reduction 130, result has 14.5 percent of original size [2021-08-26 02:27:24,888 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 6 case distinctions, treesize of input 61 treesize of output 51 [2021-08-26 02:27:25,093 INFO L354 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2021-08-26 02:27:25,094 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 5 case distinctions, treesize of input 53 treesize of output 58 [2021-08-26 02:27:25,351 INFO L354 Elim1Store]: treesize reduction 200, result has 12.7 percent of original size [2021-08-26 02:27:25,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 65 [2021-08-26 02:27:25,786 INFO L354 Elim1Store]: treesize reduction 238, result has 18.2 percent of original size [2021-08-26 02:27:25,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 96 [2021-08-26 02:27:27,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:27:27,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 02:27:27,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 02:27:27,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632468054] [2021-08-26 02:27:27,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 02:27:27,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:27,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 02:27:27,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-08-26 02:27:27,412 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:27,550 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-08-26 02:27:27,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 02:27:27,551 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-26 02:27:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:27,551 INFO L225 Difference]: With dead ends: 42 [2021-08-26 02:27:27,552 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 02:27:27,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1012.5ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-08-26 02:27:27,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 02:27:27,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-08-26 02:27:27,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 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) [2021-08-26 02:27:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-08-26 02:27:27,570 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 26 [2021-08-26 02:27:27,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:27,571 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-08-26 02:27:27,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:27,571 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-08-26 02:27:27,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 02:27:27,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:27,574 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:27,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 02:27:27,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:27,789 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:27:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:27,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2074111754, now seen corresponding path program 6 times [2021-08-26 02:27:27,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:27,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496904958] [2021-08-26 02:27:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:27,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:28,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:28,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496904958] [2021-08-26 02:27:28,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496904958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:28,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493958066] [2021-08-26 02:27:28,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 02:27:28,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:28,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:28,133 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) [2021-08-26 02:27:28,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 02:27:28,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-26 02:27:28,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:27:28,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-26 02:27:28,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:28,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:27:28,667 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:27:28,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:27:28,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:28,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-26 02:27:28,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:27:28,800 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-26 02:27:28,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-08-26 02:27:28,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:27:28,891 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:27:28,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 79 [2021-08-26 02:27:28,903 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:27:28,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 81 [2021-08-26 02:27:29,012 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:27:29,013 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 91 [2021-08-26 02:27:29,031 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-08-26 02:27:29,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 76 [2021-08-26 02:27:29,036 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:27:29,037 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 128 treesize of output 95 [2021-08-26 02:27:29,052 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-08-26 02:27:29,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 83 [2021-08-26 02:27:30,229 INFO L354 Elim1Store]: treesize reduction 110, result has 14.7 percent of original size [2021-08-26 02:27:30,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 131 treesize of output 93 [2021-08-26 02:27:30,259 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-08-26 02:27:30,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 48 [2021-08-26 02:27:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:30,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493958066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:30,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:30,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 16 [2021-08-26 02:27:30,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599242433] [2021-08-26 02:27:30,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 02:27:30,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:30,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 02:27:30,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=201, Unknown=1, NotChecked=0, Total=240 [2021-08-26 02:27:30,275 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:33,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:33,952 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2021-08-26 02:27:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 02:27:33,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-26 02:27:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:33,953 INFO L225 Difference]: With dead ends: 56 [2021-08-26 02:27:33,953 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 02:27:33,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1124.2ms TimeCoverageRelationStatistics Valid=74, Invalid=431, Unknown=1, NotChecked=0, Total=506 [2021-08-26 02:27:33,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 02:27:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-08-26 02:27:33,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:33,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-08-26 02:27:33,958 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 27 [2021-08-26 02:27:33,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:33,958 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-08-26 02:27:33,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:33,959 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-08-26 02:27:33,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 02:27:33,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:33,959 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:33,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 02:27:34,164 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,SelfDestructingSolverStorable11 [2021-08-26 02:27:34,165 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:27:34,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:34,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1200338371, now seen corresponding path program 7 times [2021-08-26 02:27:34,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:34,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767209577] [2021-08-26 02:27:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:34,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:34,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:34,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767209577] [2021-08-26 02:27:34,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767209577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:34,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100034702] [2021-08-26 02:27:34,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 02:27:34,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:34,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:34,598 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) [2021-08-26 02:27:34,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 02:27:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:35,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-26 02:27:35,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:35,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:27:35,158 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:27:35,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:27:35,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:35,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-26 02:27:35,342 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-26 02:27:35,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 36 [2021-08-26 02:27:35,364 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-08-26 02:27:35,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 44 [2021-08-26 02:27:35,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:27:35,485 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-26 02:27:35,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 89 [2021-08-26 02:27:35,494 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-08-26 02:27:35,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 114 [2021-08-26 02:27:35,639 INFO L354 Elim1Store]: treesize reduction 92, result has 18.6 percent of original size [2021-08-26 02:27:35,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 100 [2021-08-26 02:27:35,670 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-08-26 02:27:35,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 87 [2021-08-26 02:27:35,699 INFO L354 Elim1Store]: treesize reduction 44, result has 27.9 percent of original size [2021-08-26 02:27:35,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 100 [2021-08-26 02:27:35,841 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-08-26 02:27:35,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 280 treesize of output 147 [2021-08-26 02:27:35,859 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-08-26 02:27:35,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 327 treesize of output 204 [2021-08-26 02:27:36,057 INFO L354 Elim1Store]: treesize reduction 158, result has 15.1 percent of original size [2021-08-26 02:27:36,057 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 606 treesize of output 183 [2021-08-26 02:27:36,103 INFO L354 Elim1Store]: treesize reduction 134, result has 17.3 percent of original size [2021-08-26 02:27:36,103 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 501 treesize of output 160 [2021-08-26 02:27:36,143 INFO L354 Elim1Store]: treesize reduction 178, result has 12.7 percent of original size [2021-08-26 02:27:36,144 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 479 treesize of output 314 [2021-08-26 02:27:36,182 INFO L354 Elim1Store]: treesize reduction 124, result has 17.3 percent of original size [2021-08-26 02:27:36,182 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 374 treesize of output 257 [2021-08-26 02:27:36,199 INFO L354 Elim1Store]: treesize reduction 171, result has 20.1 percent of original size [2021-08-26 02:27:36,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 352 treesize of output 265 [2021-08-26 02:27:36,747 INFO L354 Elim1Store]: treesize reduction 129, result has 5.8 percent of original size [2021-08-26 02:27:36,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 339 treesize of output 123 [2021-08-26 02:27:36,778 INFO L354 Elim1Store]: treesize reduction 110, result has 2.7 percent of original size [2021-08-26 02:27:36,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 59 [2021-08-26 02:27:36,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-26 02:27:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:36,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100034702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:36,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:36,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-08-26 02:27:36,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127213946] [2021-08-26 02:27:36,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-26 02:27:36,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:36,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-26 02:27:36,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-08-26 02:27:36,810 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:45,715 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-08-26 02:27:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-26 02:27:45,716 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-26 02:27:45,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:45,716 INFO L225 Difference]: With dead ends: 50 [2021-08-26 02:27:45,717 INFO L226 Difference]: Without dead ends: 48 [2021-08-26 02:27:45,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1017.3ms TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 02:27:45,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-26 02:27:45,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-08-26 02:27:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-08-26 02:27:45,722 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2021-08-26 02:27:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:45,722 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-08-26 02:27:45,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:27:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-08-26 02:27:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-26 02:27:45,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:45,725 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:45,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 02:27:45,944 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,SelfDestructingSolverStorable12 [2021-08-26 02:27:45,945 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:27:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:45,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1183197073, now seen corresponding path program 8 times [2021-08-26 02:27:45,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:45,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508930408] [2021-08-26 02:27:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:45,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:46,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:46,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508930408] [2021-08-26 02:27:46,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508930408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:46,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835004840] [2021-08-26 02:27:46,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:27:46,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:46,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:46,497 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:27:46,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 02:27:47,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:27:47,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:27:47,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-26 02:27:47,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:47,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:27:47,157 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:27:47,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:27:47,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:47,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-26 02:27:47,306 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:27:47,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 33 [2021-08-26 02:27:47,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:27:47,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:27:47,458 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:27:47,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 72 [2021-08-26 02:27:47,469 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:27:47,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 102 [2021-08-26 02:27:47,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:27:47,609 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-08-26 02:27:47,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 84 [2021-08-26 02:27:47,628 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-08-26 02:27:47,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 102 [2021-08-26 02:27:47,666 INFO L354 Elim1Store]: treesize reduction 138, result has 27.4 percent of original size [2021-08-26 02:27:47,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 96 treesize of output 126 [2021-08-26 02:27:47,835 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-26 02:27:47,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 268 treesize of output 147 [2021-08-26 02:27:47,854 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-08-26 02:27:47,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 319 treesize of output 252 [2021-08-26 02:27:47,864 INFO L354 Elim1Store]: treesize reduction 91, result has 20.2 percent of original size [2021-08-26 02:27:47,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 282 treesize of output 226 [2021-08-26 02:27:48,041 INFO L354 Elim1Store]: treesize reduction 116, result has 15.9 percent of original size [2021-08-26 02:27:48,041 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 274 treesize of output 129 [2021-08-26 02:27:48,061 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-08-26 02:27:48,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 171 treesize of output 154 [2021-08-26 02:27:48,077 INFO L354 Elim1Store]: treesize reduction 73, result has 24.0 percent of original size [2021-08-26 02:27:48,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 155 [2021-08-26 02:27:48,102 INFO L354 Elim1Store]: treesize reduction 100, result has 22.5 percent of original size [2021-08-26 02:27:48,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 152 treesize of output 158 [2021-08-26 02:27:48,304 INFO L354 Elim1Store]: treesize reduction 116, result has 15.9 percent of original size [2021-08-26 02:27:48,305 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 458 treesize of output 151 [2021-08-26 02:27:48,326 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-08-26 02:27:48,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 513 treesize of output 384 [2021-08-26 02:27:48,351 INFO L354 Elim1Store]: treesize reduction 268, result has 16.5 percent of original size [2021-08-26 02:27:48,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 456 treesize of output 377 [2021-08-26 02:27:48,702 INFO L354 Elim1Store]: treesize reduction 192, result has 13.9 percent of original size [2021-08-26 02:27:48,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 782 treesize of output 187 [2021-08-26 02:27:48,778 INFO L354 Elim1Store]: treesize reduction 192, result has 13.9 percent of original size [2021-08-26 02:27:48,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 683 treesize of output 172 [2021-08-26 02:27:48,806 INFO L354 Elim1Store]: treesize reduction 120, result has 13.7 percent of original size [2021-08-26 02:27:48,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 651 treesize of output 492 [2021-08-26 02:27:48,833 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-08-26 02:27:48,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 552 treesize of output 417 [2021-08-26 02:27:48,883 INFO L354 Elim1Store]: treesize reduction 866, result has 9.2 percent of original size [2021-08-26 02:27:48,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 520 treesize of output 455 [2021-08-26 02:27:51,646 INFO L354 Elim1Store]: treesize reduction 215, result has 3.6 percent of original size [2021-08-26 02:27:51,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 483 treesize of output 125 [2021-08-26 02:27:51,664 INFO L354 Elim1Store]: treesize reduction 68, result has 4.2 percent of original size [2021-08-26 02:27:51,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 79 [2021-08-26 02:27:51,852 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-26 02:27:51,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-08-26 02:27:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:51,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835004840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:51,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:51,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-08-26 02:27:51,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528852471] [2021-08-26 02:27:51,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-26 02:27:51,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:51,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-26 02:27:51,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=539, Unknown=1, NotChecked=0, Total=600 [2021-08-26 02:27:51,861 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:28:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:28:03,675 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-08-26 02:28:03,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 02:28:03,676 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-26 02:28:03,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:28:03,676 INFO L225 Difference]: With dead ends: 67 [2021-08-26 02:28:03,676 INFO L226 Difference]: Without dead ends: 65 [2021-08-26 02:28:03,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 5914.1ms TimeCoverageRelationStatistics Valid=179, Invalid=1541, Unknown=2, NotChecked=0, Total=1722 [2021-08-26 02:28:03,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-26 02:28:03,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 40. [2021-08-26 02:28:03,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:28:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-08-26 02:28:03,683 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2021-08-26 02:28:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:28:03,683 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-08-26 02:28:03,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:28:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-08-26 02:28:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 02:28:03,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:28:03,684 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:28:03,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 02:28:03,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-26 02:28:03,893 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:28:03,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:28:03,893 INFO L82 PathProgramCache]: Analyzing trace with hash -612488664, now seen corresponding path program 9 times [2021-08-26 02:28:03,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:28:03,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023266884] [2021-08-26 02:28:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:28:03,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:28:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:28:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:28:04,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:28:04,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023266884] [2021-08-26 02:28:04,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023266884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:28:04,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289855497] [2021-08-26 02:28:04,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:28:04,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:28:04,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:28:04,401 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:28:04,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 02:28:05,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-26 02:28:05,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:28:05,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 68 conjunts are in the unsatisfiable core [2021-08-26 02:28:05,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:28:05,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:28:05,321 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:28:05,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:28:05,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-26 02:28:05,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:28:05,460 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-26 02:28:05,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-08-26 02:28:05,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:28:05,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:28:05,560 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:28:05,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 62 [2021-08-26 02:28:05,569 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:28:05,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 80 [2021-08-26 02:28:05,661 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-08-26 02:28:05,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 82 [2021-08-26 02:28:05,677 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-08-26 02:28:05,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 50 [2021-08-26 02:28:05,778 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-26 02:28:05,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 171 treesize of output 102 [2021-08-26 02:28:05,794 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-08-26 02:28:05,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 107 [2021-08-26 02:28:05,946 INFO L354 Elim1Store]: treesize reduction 120, result has 15.5 percent of original size [2021-08-26 02:28:05,946 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 310 treesize of output 139 [2021-08-26 02:28:05,992 INFO L354 Elim1Store]: treesize reduction 80, result has 32.2 percent of original size [2021-08-26 02:28:05,993 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 235 treesize of output 132 [2021-08-26 02:28:06,061 INFO L354 Elim1Store]: treesize reduction 202, result has 12.6 percent of original size [2021-08-26 02:28:06,061 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 5 new quantified variables, introduced 7 case distinctions, treesize of input 104 treesize of output 107 [2021-08-26 02:28:18,482 INFO L354 Elim1Store]: treesize reduction 227, result has 13.0 percent of original size [2021-08-26 02:28:18,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 290 treesize of output 156 [2021-08-26 02:28:18,529 INFO L354 Elim1Store]: treesize reduction 207, result has 4.6 percent of original size [2021-08-26 02:28:18,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 93 treesize of output 79 [2021-08-26 02:28:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:28:18,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289855497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:28:18,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:28:18,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 26 [2021-08-26 02:28:18,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674563617] [2021-08-26 02:28:18,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-26 02:28:18,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:28:18,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-26 02:28:18,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=577, Unknown=4, NotChecked=0, Total=650 [2021-08-26 02:28:18,545 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:28:58,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:28:58,705 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-08-26 02:28:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 02:28:58,705 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-26 02:28:58,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:28:58,706 INFO L225 Difference]: With dead ends: 57 [2021-08-26 02:28:58,706 INFO L226 Difference]: Without dead ends: 38 [2021-08-26 02:28:58,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 14254.9ms TimeCoverageRelationStatistics Valid=143, Invalid=1182, Unknown=7, NotChecked=0, Total=1332 [2021-08-26 02:28:58,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-26 02:28:58,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-08-26 02:28:58,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:28:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-08-26 02:28:58,711 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2021-08-26 02:28:58,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:28:58,711 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-08-26 02:28:58,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:28:58,711 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-08-26 02:28:58,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-26 02:28:58,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:28:58,712 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:28:58,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-26 02:28:58,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-26 02:28:58,913 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:28:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:28:58,913 INFO L82 PathProgramCache]: Analyzing trace with hash 177403900, now seen corresponding path program 10 times [2021-08-26 02:28:58,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:28:58,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425452671] [2021-08-26 02:28:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:28:58,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:28:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:28:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:28:59,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:28:59,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425452671] [2021-08-26 02:28:59,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425452671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:28:59,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370027850] [2021-08-26 02:28:59,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:28:59,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:28:59,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:28:59,678 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:28:59,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 02:29:00,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:29:00,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:29:00,508 WARN L261 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 84 conjunts are in the unsatisfiable core [2021-08-26 02:29:00,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:29:00,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:29:00,577 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:29:00,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:29:00,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-26 02:29:00,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:29:00,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:29:00,720 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:29:00,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 33 [2021-08-26 02:29:00,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:29:00,862 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:29:00,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 72 [2021-08-26 02:29:00,871 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:29:00,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 102 [2021-08-26 02:29:01,003 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-08-26 02:29:01,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 120 [2021-08-26 02:29:01,020 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-08-26 02:29:01,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 72 [2021-08-26 02:29:01,059 INFO L354 Elim1Store]: treesize reduction 138, result has 27.4 percent of original size [2021-08-26 02:29:01,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 99 treesize of output 129 [2021-08-26 02:29:01,247 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-08-26 02:29:01,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 102 [2021-08-26 02:29:01,264 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-08-26 02:29:01,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 203 treesize of output 197 [2021-08-26 02:29:01,457 INFO L354 Elim1Store]: treesize reduction 108, result has 16.9 percent of original size [2021-08-26 02:29:01,457 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 111 [2021-08-26 02:29:01,491 INFO L354 Elim1Store]: treesize reduction 168, result has 16.8 percent of original size [2021-08-26 02:29:01,492 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 140 treesize of output 122 [2021-08-26 02:29:01,526 INFO L354 Elim1Store]: treesize reduction 100, result has 22.5 percent of original size [2021-08-26 02:29:01,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 125 treesize of output 131 [2021-08-26 02:29:01,570 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:29:01,794 INFO L354 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2021-08-26 02:29:01,794 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 408 treesize of output 177 [2021-08-26 02:29:01,830 INFO L354 Elim1Store]: treesize reduction 228, result has 13.0 percent of original size [2021-08-26 02:29:01,830 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 479 treesize of output 355 [2021-08-26 02:29:01,842 INFO L354 Elim1Store]: treesize reduction 123, result has 20.1 percent of original size [2021-08-26 02:29:01,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 463 treesize of output 387 [2021-08-26 02:29:02,113 INFO L354 Elim1Store]: treesize reduction 212, result has 12.0 percent of original size [2021-08-26 02:29:02,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 996 treesize of output 278 [2021-08-26 02:29:02,160 INFO L354 Elim1Store]: treesize reduction 156, result has 15.7 percent of original size [2021-08-26 02:29:02,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 831 treesize of output 243 [2021-08-26 02:29:02,215 INFO L354 Elim1Store]: treesize reduction 388, result has 12.0 percent of original size [2021-08-26 02:29:02,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 797 treesize of output 406 [2021-08-26 02:29:02,262 INFO L354 Elim1Store]: treesize reduction 300, result has 15.0 percent of original size [2021-08-26 02:29:02,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 632 treesize of output 337 [2021-08-26 02:29:02,283 INFO L354 Elim1Store]: treesize reduction 496, result has 10.6 percent of original size [2021-08-26 02:29:02,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 376 treesize of output 300 [2021-08-26 02:29:13,358 INFO L354 Elim1Store]: treesize reduction 222, result has 14.9 percent of original size [2021-08-26 02:29:13,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 353 treesize of output 178 [2021-08-26 02:29:13,422 INFO L354 Elim1Store]: treesize reduction 214, result has 3.2 percent of original size [2021-08-26 02:29:13,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 127 treesize of output 102 [2021-08-26 02:29:13,493 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:29:13,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-08-26 02:29:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:29:13,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370027850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:29:13,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:29:13,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 29 [2021-08-26 02:29:13,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852414318] [2021-08-26 02:29:13,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-26 02:29:13,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:29:13,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-26 02:29:13,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=720, Unknown=5, NotChecked=0, Total=812 [2021-08-26 02:29:13,503 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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) [2021-08-26 02:29:14,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:29:14,425 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-08-26 02:29:14,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 02:29:14,425 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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) Word has length 35 [2021-08-26 02:29:14,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:29:14,426 INFO L225 Difference]: With dead ends: 60 [2021-08-26 02:29:14,426 INFO L226 Difference]: Without dead ends: 58 [2021-08-26 02:29:14,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 11720.4ms TimeCoverageRelationStatistics Valid=193, Invalid=1694, Unknown=5, NotChecked=0, Total=1892 [2021-08-26 02:29:14,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-26 02:29:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2021-08-26 02:29:14,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 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) [2021-08-26 02:29:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-08-26 02:29:14,438 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 35 [2021-08-26 02:29:14,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:29:14,438 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-08-26 02:29:14,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 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) [2021-08-26 02:29:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-08-26 02:29:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-26 02:29:14,439 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:29:14,439 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:29:14,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-26 02:29:14,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:29:14,650 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:29:14,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:29:14,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1756596811, now seen corresponding path program 11 times [2021-08-26 02:29:14,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:29:14,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110486179] [2021-08-26 02:29:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:29:14,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:29:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:29:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:29:15,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:29:15,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110486179] [2021-08-26 02:29:15,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110486179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:29:15,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684532054] [2021-08-26 02:29:15,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 02:29:15,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:29:15,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:29:15,467 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:29:15,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 02:29:16,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-26 02:29:16,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:29:16,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 91 conjunts are in the unsatisfiable core [2021-08-26 02:29:16,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:29:16,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:29:16,695 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:29:16,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:29:16,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:29:16,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-26 02:29:16,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:29:16,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:29:16,855 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:29:16,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 33 [2021-08-26 02:29:16,954 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:29:16,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2021-08-26 02:29:16,971 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:29:16,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 95 [2021-08-26 02:29:17,062 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:29:17,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 80 [2021-08-26 02:29:17,073 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:29:17,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2021-08-26 02:29:17,109 INFO L354 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2021-08-26 02:29:17,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 68 treesize of output 90 [2021-08-26 02:29:17,259 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-08-26 02:29:17,260 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 229 treesize of output 217 [2021-08-26 02:29:17,288 INFO L354 Elim1Store]: treesize reduction 112, result has 21.1 percent of original size [2021-08-26 02:29:17,288 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 273 treesize of output 278 [2021-08-26 02:29:17,442 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:29:17,449 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-08-26 02:29:17,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 136 [2021-08-26 02:29:17,456 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-26 02:29:17,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 91 [2021-08-26 02:29:17,510 INFO L354 Elim1Store]: treesize reduction 184, result has 24.9 percent of original size [2021-08-26 02:29:17,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 112 treesize of output 149 [2021-08-26 02:29:17,767 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-08-26 02:29:17,768 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 337 treesize of output 147 [2021-08-26 02:29:17,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 382 treesize of output 334 [2021-08-26 02:29:17,798 INFO L354 Elim1Store]: treesize reduction 204, result has 14.3 percent of original size [2021-08-26 02:29:17,798 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 331 treesize of output 324 [2021-08-26 02:29:18,019 INFO L354 Elim1Store]: treesize reduction 304, result has 14.8 percent of original size [2021-08-26 02:29:18,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 306 treesize of output 303 [2021-08-26 02:29:18,059 INFO L354 Elim1Store]: treesize reduction 160, result has 15.3 percent of original size [2021-08-26 02:29:18,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 291 treesize of output 133 [2021-08-26 02:29:18,083 INFO L354 Elim1Store]: treesize reduction 61, result has 23.8 percent of original size [2021-08-26 02:29:18,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 275 [2021-08-26 02:29:18,132 INFO L354 Elim1Store]: treesize reduction 260, result has 19.0 percent of original size [2021-08-26 02:29:18,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 272 treesize of output 280 [2021-08-26 02:29:18,364 INFO L354 Elim1Store]: treesize reduction 160, result has 15.3 percent of original size [2021-08-26 02:29:18,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 441 treesize of output 169 [2021-08-26 02:29:18,405 INFO L354 Elim1Store]: treesize reduction 432, result has 10.9 percent of original size [2021-08-26 02:29:18,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 506 treesize of output 498 [2021-08-26 02:29:18,429 INFO L354 Elim1Store]: treesize reduction 216, result has 16.6 percent of original size [2021-08-26 02:29:18,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 461 treesize of output 400 [2021-08-26 02:29:18,773 INFO L354 Elim1Store]: treesize reduction 250, result has 13.2 percent of original size [2021-08-26 02:29:18,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 733 treesize of output 205 [2021-08-26 02:29:18,872 INFO L354 Elim1Store]: treesize reduction 250, result has 13.2 percent of original size [2021-08-26 02:29:18,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 652 treesize of output 190 [2021-08-26 02:29:18,973 INFO L354 Elim1Store]: treesize reduction 1010, result has 7.5 percent of original size [2021-08-26 02:29:18,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 548 treesize of output 560 [2021-08-26 02:29:19,023 INFO L354 Elim1Store]: treesize reduction 702, result has 9.3 percent of original size [2021-08-26 02:29:19,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 519 treesize of output 466 [2021-08-26 02:29:26,573 INFO L354 Elim1Store]: treesize reduction 348, result has 8.2 percent of original size [2021-08-26 02:29:26,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 534 treesize of output 183 [2021-08-26 02:29:26,623 INFO L354 Elim1Store]: treesize reduction 226, result has 3.0 percent of original size [2021-08-26 02:29:26,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 138 treesize of output 116 [2021-08-26 02:29:26,722 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-26 02:29:26,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-08-26 02:29:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:29:26,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684532054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:29:26,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:29:26,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-08-26 02:29:26,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318963658] [2021-08-26 02:29:26,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-26 02:29:26,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:29:26,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-26 02:29:26,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=622, Unknown=3, NotChecked=0, Total=702 [2021-08-26 02:29:26,729 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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) [2021-08-26 02:29:40,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:29:40,283 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-08-26 02:29:40,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-26 02:29:40,284 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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) Word has length 39 [2021-08-26 02:29:40,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:29:40,284 INFO L225 Difference]: With dead ends: 80 [2021-08-26 02:29:40,284 INFO L226 Difference]: Without dead ends: 78 [2021-08-26 02:29:40,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 7833.5ms TimeCoverageRelationStatistics Valid=188, Invalid=1701, Unknown=3, NotChecked=0, Total=1892 [2021-08-26 02:29:40,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-26 02:29:40,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-08-26 02:29:40,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 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) [2021-08-26 02:29:40,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-08-26 02:29:40,292 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 39 [2021-08-26 02:29:40,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:29:40,293 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-08-26 02:29:40,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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) [2021-08-26 02:29:40,293 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-08-26 02:29:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-26 02:29:40,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:29:40,294 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:29:40,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 02:29:40,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-26 02:29:40,521 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:29:40,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:29:40,521 INFO L82 PathProgramCache]: Analyzing trace with hash -477752548, now seen corresponding path program 12 times [2021-08-26 02:29:40,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:29:40,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868677794] [2021-08-26 02:29:40,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:29:40,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:29:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:29:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:29:41,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:29:41,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868677794] [2021-08-26 02:29:41,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868677794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:29:41,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085301024] [2021-08-26 02:29:41,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 02:29:41,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:29:41,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:29:41,403 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:29:41,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 02:29:42,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-26 02:29:42,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:29:42,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 88 conjunts are in the unsatisfiable core [2021-08-26 02:29:42,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:29:42,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:29:42,829 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:29:42,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:29:42,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-26 02:29:42,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:29:42,959 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:29:42,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 33 [2021-08-26 02:29:42,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:29:42,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:29:43,106 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:29:43,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 72 [2021-08-26 02:29:43,116 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:29:43,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 102 [2021-08-26 02:29:43,257 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-08-26 02:29:43,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 91 [2021-08-26 02:29:43,275 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-08-26 02:29:43,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 81 [2021-08-26 02:29:43,312 INFO L354 Elim1Store]: treesize reduction 98, result has 26.9 percent of original size [2021-08-26 02:29:43,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 75 treesize of output 97 [2021-08-26 02:29:43,520 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-08-26 02:29:43,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 102 [2021-08-26 02:29:43,547 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-08-26 02:29:43,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 203 treesize of output 197 [2021-08-26 02:29:43,726 INFO L354 Elim1Store]: treesize reduction 108, result has 16.9 percent of original size [2021-08-26 02:29:43,726 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 111 [2021-08-26 02:29:43,758 INFO L354 Elim1Store]: treesize reduction 168, result has 16.8 percent of original size [2021-08-26 02:29:43,758 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 188 treesize of output 170 [2021-08-26 02:29:43,783 INFO L354 Elim1Store]: treesize reduction 136, result has 23.2 percent of original size [2021-08-26 02:29:43,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 161 treesize of output 167 [2021-08-26 02:29:43,949 INFO L354 Elim1Store]: treesize reduction 156, result has 20.4 percent of original size [2021-08-26 02:29:43,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 448 treesize of output 388 [2021-08-26 02:29:44,034 INFO L354 Elim1Store]: treesize reduction 316, result has 18.6 percent of original size [2021-08-26 02:29:44,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 576 treesize of output 591 [2021-08-26 02:29:44,378 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-08-26 02:29:44,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 369 treesize of output 133 [2021-08-26 02:29:44,419 INFO L354 Elim1Store]: treesize reduction 112, result has 20.6 percent of original size [2021-08-26 02:29:44,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 306 treesize of output 118 [2021-08-26 02:29:44,463 INFO L354 Elim1Store]: treesize reduction 384, result has 12.1 percent of original size [2021-08-26 02:29:44,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 226 treesize of output 238 [2021-08-26 02:30:01,086 INFO L354 Elim1Store]: treesize reduction 384, result has 12.1 percent of original size [2021-08-26 02:30:01,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 19 new quantified variables, introduced 36 case distinctions, treesize of input 477 treesize of output 221 [2021-08-26 02:30:01,198 INFO L354 Elim1Store]: treesize reduction 364, result has 3.4 percent of original size [2021-08-26 02:30:01,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 122 treesize of output 106 [2021-08-26 02:30:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:30:01,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085301024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:30:01,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:30:01,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 30 [2021-08-26 02:30:01,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578670660] [2021-08-26 02:30:01,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-26 02:30:01,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:30:01,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-26 02:30:01,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=783, Unknown=3, NotChecked=0, Total=870 [2021-08-26 02:30:01,213 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:30:04,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:30:04,230 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-08-26 02:30:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 02:30:04,230 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-26 02:30:04,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:30:04,230 INFO L225 Difference]: With dead ends: 67 [2021-08-26 02:30:04,230 INFO L226 Difference]: Without dead ends: 45 [2021-08-26 02:30:04,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 16784.2ms TimeCoverageRelationStatistics Valid=145, Invalid=1492, Unknown=3, NotChecked=0, Total=1640 [2021-08-26 02:30:04,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-26 02:30:04,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-08-26 02:30:04,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:30:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-08-26 02:30:04,235 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 41 [2021-08-26 02:30:04,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:30:04,235 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-08-26 02:30:04,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:30:04,235 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-08-26 02:30:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-26 02:30:04,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:30:04,236 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:30:04,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-26 02:30:04,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-26 02:30:04,437 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:30:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:30:04,437 INFO L82 PathProgramCache]: Analyzing trace with hash -889254666, now seen corresponding path program 13 times [2021-08-26 02:30:04,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:30:04,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749439851] [2021-08-26 02:30:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:30:04,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:30:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:30:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:30:05,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:30:05,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749439851] [2021-08-26 02:30:05,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749439851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:30:05,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87398668] [2021-08-26 02:30:05,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 02:30:05,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:30:05,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:30:05,511 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:30:05,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 02:30:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:30:06,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 99 conjunts are in the unsatisfiable core [2021-08-26 02:30:06,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:30:06,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:30:06,968 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:30:06,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:30:07,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-26 02:30:07,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:30:07,125 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:30:07,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 33 [2021-08-26 02:30:07,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:30:07,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:30:07,232 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:30:07,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2021-08-26 02:30:07,242 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:30:07,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 95 [2021-08-26 02:30:07,334 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:30:07,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 89 [2021-08-26 02:30:07,339 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:30:07,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 65 [2021-08-26 02:30:07,377 INFO L354 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2021-08-26 02:30:07,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 68 treesize of output 90 [2021-08-26 02:30:07,528 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-08-26 02:30:07,529 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 200 [2021-08-26 02:30:07,559 INFO L354 Elim1Store]: treesize reduction 112, result has 21.1 percent of original size [2021-08-26 02:30:07,560 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 247 treesize of output 252 [2021-08-26 02:30:07,708 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-26 02:30:07,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 106 [2021-08-26 02:30:07,714 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-08-26 02:30:07,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 121 [2021-08-26 02:30:07,769 INFO L354 Elim1Store]: treesize reduction 184, result has 24.9 percent of original size [2021-08-26 02:30:07,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 112 treesize of output 149 [2021-08-26 02:30:07,997 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-08-26 02:30:07,998 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 286 treesize of output 132 [2021-08-26 02:30:08,029 INFO L354 Elim1Store]: treesize reduction 204, result has 14.3 percent of original size [2021-08-26 02:30:08,029 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 331 treesize of output 324 [2021-08-26 02:30:08,294 INFO L354 Elim1Store]: treesize reduction 304, result has 14.8 percent of original size [2021-08-26 02:30:08,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 276 treesize of output 273 [2021-08-26 02:30:08,343 INFO L354 Elim1Store]: treesize reduction 160, result has 15.3 percent of original size [2021-08-26 02:30:08,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 115 [2021-08-26 02:30:08,386 INFO L354 Elim1Store]: treesize reduction 196, result has 18.7 percent of original size [2021-08-26 02:30:08,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 166 treesize of output 174 [2021-08-26 02:30:08,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:30:08,634 INFO L354 Elim1Store]: treesize reduction 144, result has 16.8 percent of original size [2021-08-26 02:30:08,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 540 treesize of output 195 [2021-08-26 02:30:08,677 INFO L354 Elim1Store]: treesize reduction 416, result has 11.3 percent of original size [2021-08-26 02:30:08,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 669 treesize of output 504 [2021-08-26 02:30:08,688 INFO L354 Elim1Store]: treesize reduction 155, result has 20.1 percent of original size [2021-08-26 02:30:08,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 649 treesize of output 553 [2021-08-26 02:30:09,070 INFO L354 Elim1Store]: treesize reduction 286, result has 11.2 percent of original size [2021-08-26 02:30:09,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 12 new quantified variables, introduced 15 case distinctions, treesize of input 1382 treesize of output 308 [2021-08-26 02:30:09,138 INFO L354 Elim1Store]: treesize reduction 216, result has 14.3 percent of original size [2021-08-26 02:30:09,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 12 new quantified variables, introduced 15 case distinctions, treesize of input 1177 treesize of output 273 [2021-08-26 02:30:09,206 INFO L354 Elim1Store]: treesize reduction 626, result has 10.8 percent of original size [2021-08-26 02:30:09,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 1135 treesize of output 627 [2021-08-26 02:30:09,266 INFO L354 Elim1Store]: treesize reduction 464, result has 14.1 percent of original size [2021-08-26 02:30:09,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 732 treesize of output 535 [2021-08-26 02:30:09,282 INFO L354 Elim1Store]: treesize reduction 511, result has 7.1 percent of original size [2021-08-26 02:30:09,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 690 treesize of output 606 [2021-08-26 02:30:10,982 INFO L354 Elim1Store]: treesize reduction 399, result has 8.7 percent of original size [2021-08-26 02:30:10,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 19 new quantified variables, introduced 36 case distinctions, treesize of input 723 treesize of output 230 [2021-08-26 02:30:11,088 INFO L354 Elim1Store]: treesize reduction 371, result has 2.6 percent of original size [2021-08-26 02:30:11,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 149 treesize of output 126 [2021-08-26 02:30:11,152 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:30:11,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-08-26 02:30:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:30:11,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87398668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:30:11,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:30:11,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 30 [2021-08-26 02:30:11,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202089627] [2021-08-26 02:30:11,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-26 02:30:11,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:30:11,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-26 02:30:11,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-26 02:30:11,161 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:30:31,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:30:31,362 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2021-08-26 02:30:31,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-26 02:30:31,363 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-26 02:30:31,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:30:31,363 INFO L225 Difference]: With dead ends: 70 [2021-08-26 02:30:31,363 INFO L226 Difference]: Without dead ends: 68 [2021-08-26 02:30:31,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 2633.1ms TimeCoverageRelationStatistics Valid=186, Invalid=1976, Unknown=0, NotChecked=0, Total=2162 [2021-08-26 02:30:31,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-26 02:30:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2021-08-26 02:30:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:30:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-08-26 02:30:31,372 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 42 [2021-08-26 02:30:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:30:31,372 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-08-26 02:30:31,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:30:31,372 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-08-26 02:30:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 02:30:31,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:30:31,373 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:30:31,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-26 02:30:31,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:30:31,577 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:30:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:30:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash 818437405, now seen corresponding path program 14 times [2021-08-26 02:30:31,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:30:31,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838674222] [2021-08-26 02:30:31,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:30:31,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:30:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:30:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:30:32,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:30:32,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838674222] [2021-08-26 02:30:32,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838674222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:30:32,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549975407] [2021-08-26 02:30:32,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:30:32,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:30:32,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:30:32,824 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:30:32,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 02:30:34,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:30:34,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:30:34,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 104 conjunts are in the unsatisfiable core [2021-08-26 02:30:34,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:30:34,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:30:34,447 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:30:34,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:30:34,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:30:34,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-26 02:30:34,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:30:34,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:30:34,609 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:30:34,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 33 [2021-08-26 02:30:34,739 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:30:34,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2021-08-26 02:30:34,751 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:30:34,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 95 [2021-08-26 02:30:34,863 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:30:34,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 89 [2021-08-26 02:30:34,870 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:30:34,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 65 [2021-08-26 02:30:34,909 INFO L354 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2021-08-26 02:30:34,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 68 treesize of output 90 [2021-08-26 02:30:35,098 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-08-26 02:30:35,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 102 [2021-08-26 02:30:35,131 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-08-26 02:30:35,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 203 treesize of output 197 [2021-08-26 02:30:35,303 INFO L354 Elim1Store]: treesize reduction 108, result has 16.9 percent of original size [2021-08-26 02:30:35,303 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 110 [2021-08-26 02:30:35,332 INFO L354 Elim1Store]: treesize reduction 168, result has 16.8 percent of original size [2021-08-26 02:30:35,333 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 179 treesize of output 173 [2021-08-26 02:30:35,391 INFO L354 Elim1Store]: treesize reduction 264, result has 24.4 percent of original size [2021-08-26 02:30:35,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 164 treesize of output 213 [2021-08-26 02:30:35,641 INFO L354 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2021-08-26 02:30:35,642 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 327 treesize of output 152 [2021-08-26 02:30:35,674 INFO L354 Elim1Store]: treesize reduction 228, result has 13.0 percent of original size [2021-08-26 02:30:35,674 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 428 treesize of output 340 [2021-08-26 02:30:35,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:30:35,971 INFO L354 Elim1Store]: treesize reduction 316, result has 14.4 percent of original size [2021-08-26 02:30:35,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 425 treesize of output 353 [2021-08-26 02:30:36,039 INFO L354 Elim1Store]: treesize reduction 172, result has 14.4 percent of original size [2021-08-26 02:30:36,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 410 treesize of output 141 [2021-08-26 02:30:36,136 INFO L354 Elim1Store]: treesize reduction 548, result has 21.9 percent of original size [2021-08-26 02:30:36,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 395 treesize of output 481 [2021-08-26 02:30:36,530 INFO L354 Elim1Store]: treesize reduction 156, result has 15.7 percent of original size [2021-08-26 02:30:36,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 903 treesize of output 257 [2021-08-26 02:30:36,585 INFO L354 Elim1Store]: treesize reduction 300, result has 15.0 percent of original size [2021-08-26 02:30:36,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 1196 treesize of output 667 [2021-08-26 02:30:36,599 INFO L354 Elim1Store]: treesize reduction 267, result has 20.1 percent of original size [2021-08-26 02:30:36,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1093 treesize of output 927 [2021-08-26 02:30:36,954 INFO L354 Elim1Store]: treesize reduction 205, result has 24.6 percent of original size [2021-08-26 02:30:36,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 975 treesize of output 974 [2021-08-26 02:30:37,015 INFO L354 Elim1Store]: treesize reduction 248, result has 12.7 percent of original size [2021-08-26 02:30:37,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 971 treesize of output 211 [2021-08-26 02:30:37,063 INFO L354 Elim1Store]: treesize reduction 316, result has 14.4 percent of original size [2021-08-26 02:30:37,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 560 treesize of output 434 [2021-08-26 02:30:37,114 INFO L354 Elim1Store]: treesize reduction 414, result has 16.0 percent of original size [2021-08-26 02:30:37,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 545 treesize of output 555 [2021-08-26 02:30:37,520 INFO L354 Elim1Store]: treesize reduction 248, result has 12.7 percent of original size [2021-08-26 02:30:37,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 12 new quantified variables, introduced 15 case distinctions, treesize of input 1509 treesize of output 235 [2021-08-26 02:30:37,578 INFO L354 Elim1Store]: treesize reduction 316, result has 14.4 percent of original size [2021-08-26 02:30:37,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1796 treesize of output 904 [2021-08-26 02:30:37,602 INFO L354 Elim1Store]: treesize reduction 708, result has 16.6 percent of original size [2021-08-26 02:30:37,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 1651 treesize of output 1440 [2021-08-26 02:30:38,135 INFO L354 Elim1Store]: treesize reduction 352, result has 11.3 percent of original size [2021-08-26 02:30:38,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 2373 treesize of output 271 [2021-08-26 02:30:38,263 INFO L354 Elim1Store]: treesize reduction 352, result has 11.3 percent of original size [2021-08-26 02:30:38,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 2142 treesize of output 256 [2021-08-26 02:30:38,317 INFO L354 Elim1Store]: treesize reduction 436, result has 10.8 percent of original size [2021-08-26 02:30:38,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 2066 treesize of output 1042 [2021-08-26 02:30:38,367 INFO L354 Elim1Store]: treesize reduction 316, result has 14.4 percent of original size [2021-08-26 02:30:38,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1835 treesize of output 937 [2021-08-26 02:30:38,417 INFO L354 Elim1Store]: treesize reduction 2186, result has 9.1 percent of original size [2021-08-26 02:30:38,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 1759 treesize of output 1606 [2021-08-26 02:30:47,773 INFO L354 Elim1Store]: treesize reduction 593, result has 3.6 percent of original size [2021-08-26 02:30:47,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 22 new quantified variables, introduced 45 case distinctions, treesize of input 1754 treesize of output 263 [2021-08-26 02:30:47,870 INFO L354 Elim1Store]: treesize reduction 317, result has 3.1 percent of original size [2021-08-26 02:30:47,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 164 treesize of output 147 [2021-08-26 02:30:48,018 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-26 02:30:48,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-08-26 02:30:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:30:48,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549975407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:30:48,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:30:48,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2021-08-26 02:30:48,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418786599] [2021-08-26 02:30:48,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-26 02:30:48,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:30:48,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-26 02:30:48,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1096, Unknown=3, NotChecked=0, Total=1190 [2021-08-26 02:30:48,029 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:32:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:32:06,944 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2021-08-26 02:32:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-26 02:32:06,945 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-26 02:32:06,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:32:06,945 INFO L225 Difference]: With dead ends: 93 [2021-08-26 02:32:06,945 INFO L226 Difference]: Without dead ends: 91 [2021-08-26 02:32:06,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 24809.3ms TimeCoverageRelationStatistics Valid=246, Invalid=3050, Unknown=10, NotChecked=0, Total=3306 [2021-08-26 02:32:06,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-26 02:32:06,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 54. [2021-08-26 02:32:06,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:32:06,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-08-26 02:32:06,956 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 46 [2021-08-26 02:32:06,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:32:06,956 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-08-26 02:32:06,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:32:06,956 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-08-26 02:32:06,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-26 02:32:06,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:32:06,956 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:32:06,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-26 02:32:07,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:32:07,157 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:32:07,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:32:07,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1214842006, now seen corresponding path program 15 times [2021-08-26 02:32:07,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:32:07,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245437865] [2021-08-26 02:32:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:32:07,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:32:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:32:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:32:08,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:32:08,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245437865] [2021-08-26 02:32:08,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245437865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:32:08,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889834857] [2021-08-26 02:32:08,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:32:08,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:32:08,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:32:08,382 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:32:08,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 02:32:10,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-26 02:32:10,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:32:10,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 107 conjunts are in the unsatisfiable core [2021-08-26 02:32:10,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:32:10,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:32:10,614 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:32:10,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:32:10,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-26 02:32:10,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:32:10,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:32:10,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-26 02:32:10,760 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:32:10,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 33 [2021-08-26 02:32:10,856 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:32:10,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2021-08-26 02:32:10,866 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:32:10,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 95 [2021-08-26 02:32:10,971 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:32:10,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 80 [2021-08-26 02:32:10,976 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:32:10,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2021-08-26 02:32:11,014 INFO L354 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2021-08-26 02:32:11,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 68 treesize of output 90 [2021-08-26 02:32:11,162 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-08-26 02:32:11,162 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 229 treesize of output 217 [2021-08-26 02:32:11,190 INFO L354 Elim1Store]: treesize reduction 112, result has 21.1 percent of original size [2021-08-26 02:32:11,190 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 273 treesize of output 278 [2021-08-26 02:32:11,337 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-08-26 02:32:11,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 136 [2021-08-26 02:32:11,344 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-26 02:32:11,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 91 [2021-08-26 02:32:11,418 INFO L354 Elim1Store]: treesize reduction 184, result has 24.9 percent of original size [2021-08-26 02:32:11,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 112 treesize of output 149 [2021-08-26 02:32:11,672 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-08-26 02:32:11,672 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 286 treesize of output 132 [2021-08-26 02:32:11,706 INFO L354 Elim1Store]: treesize reduction 204, result has 14.3 percent of original size [2021-08-26 02:32:11,707 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 331 treesize of output 324 [2021-08-26 02:32:11,938 INFO L354 Elim1Store]: treesize reduction 160, result has 15.3 percent of original size [2021-08-26 02:32:11,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 295 treesize of output 137 [2021-08-26 02:32:11,977 INFO L354 Elim1Store]: treesize reduction 304, result has 14.8 percent of original size [2021-08-26 02:32:11,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 200 treesize of output 181 [2021-08-26 02:32:12,013 INFO L354 Elim1Store]: treesize reduction 196, result has 18.7 percent of original size [2021-08-26 02:32:12,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 169 treesize of output 177 [2021-08-26 02:32:12,264 INFO L354 Elim1Store]: treesize reduction 264, result has 20.0 percent of original size [2021-08-26 02:32:12,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 1194 treesize of output 942 [2021-08-26 02:32:12,393 INFO L354 Elim1Store]: treesize reduction 572, result has 17.1 percent of original size [2021-08-26 02:32:12,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 1462 treesize of output 1483 [2021-08-26 02:32:13,339 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-08-26 02:32:13,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 488 treesize of output 154 [2021-08-26 02:32:13,399 INFO L354 Elim1Store]: treesize reduction 160, result has 18.4 percent of original size [2021-08-26 02:32:13,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 413 treesize of output 139 [2021-08-26 02:32:13,405 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-08-26 02:32:13,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 389 treesize of output 329 [2021-08-26 02:32:13,461 INFO L354 Elim1Store]: treesize reduction 640, result has 10.6 percent of original size [2021-08-26 02:32:13,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 314 treesize of output 305 [2021-08-26 02:32:30,272 WARN L224 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") [2021-08-26 02:32:30,273 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") [2021-08-26 02:32:30,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 02:32:30,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-08-26 02:32:30,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108190053] [2021-08-26 02:32:30,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 02:32:30,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:32:30,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 02:32:30,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=677, Unknown=4, NotChecked=0, Total=756 [2021-08-26 02:32:30,274 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:32:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:32:30,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-08-26 02:32:30,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-26 02:32:30,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:32:30,483 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@c6bc37f at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-26 02:32:30,488 INFO L168 Benchmark]: Toolchain (without parser) took 329452.90 ms. Allocated memory was 58.7 MB in the beginning and 423.6 MB in the end (delta: 364.9 MB). Free memory was 36.6 MB in the beginning and 207.2 MB in the end (delta: -170.6 MB). Peak memory consumption was 195.6 MB. Max. memory is 16.1 GB. [2021-08-26 02:32:30,488 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:32:30,488 INFO L168 Benchmark]: CACSL2BoogieTranslator took 405.66 ms. Allocated memory is still 58.7 MB. Free memory was 36.3 MB in the beginning and 34.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 02:32:30,488 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.68 ms. Allocated memory is still 58.7 MB. Free memory was 34.9 MB in the beginning and 32.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:32:30,488 INFO L168 Benchmark]: Boogie Preprocessor took 30.06 ms. Allocated memory is still 58.7 MB. Free memory was 32.6 MB in the beginning and 30.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:32:30,488 INFO L168 Benchmark]: RCFGBuilder took 671.36 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 30.5 MB in the beginning and 55.5 MB in the end (delta: -25.0 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:32:30,488 INFO L168 Benchmark]: TraceAbstraction took 328295.50 ms. Allocated memory was 77.6 MB in the beginning and 423.6 MB in the end (delta: 346.0 MB). Free memory was 55.1 MB in the beginning and 207.2 MB in the end (delta: -152.1 MB). Peak memory consumption was 195.3 MB. Max. memory is 16.1 GB. [2021-08-26 02:32:30,489 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 405.66 ms. Allocated memory is still 58.7 MB. Free memory was 36.3 MB in the beginning and 34.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.68 ms. Allocated memory is still 58.7 MB. Free memory was 34.9 MB in the beginning and 32.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.06 ms. Allocated memory is still 58.7 MB. Free memory was 32.6 MB in the beginning and 30.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 671.36 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 30.5 MB in the beginning and 55.5 MB in the end (delta: -25.0 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 328295.50 ms. Allocated memory was 77.6 MB in the beginning and 423.6 MB in the end (delta: 346.0 MB). Free memory was 55.1 MB in the beginning and 207.2 MB in the end (delta: -152.1 MB). Peak memory consumption was 195.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@c6bc37f de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@c6bc37f: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:32:32,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:32:32,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:32:32,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:32:32,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:32:32,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:32:32,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:32:32,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:32:32,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:32:32,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:32:32,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:32:32,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:32:32,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:32:32,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:32:32,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:32:32,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:32:32,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:32:32,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:32:32,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:32:32,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:32:32,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:32:32,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:32:32,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:32:32,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:32:32,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:32:32,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:32:32,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:32:32,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:32:32,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:32:32,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:32:32,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:32:32,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:32:32,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:32:32,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:32:32,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:32:32,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:32:32,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:32:32,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:32:32,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:32:32,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:32:32,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:32:32,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-26 02:32:32,430 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:32:32,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:32:32,432 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:32:32,432 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:32:32,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:32:32,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:32:32,434 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:32:32,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:32:32,435 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:32:32,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:32:32,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:32:32,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:32:32,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:32:32,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:32:32,440 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-26 02:32:32,441 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-26 02:32:32,441 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:32:32,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:32:32,441 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:32:32,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:32:32,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:32:32,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:32:32,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:32:32,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:32:32,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:32:32,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:32:32,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:32:32,443 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-26 02:32:32,443 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-26 02:32:32,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:32:32,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:32:32,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-26 02:32:32,444 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1a138e29c49fa76f78aea6f0cc9f2f633faceb2 [2021-08-26 02:32:32,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:32:32,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:32:32,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:32:32,796 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:32:32,797 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:32:32,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2021-08-26 02:32:32,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6ed47c4a/393e7841487a4b0f9bf2bb144fce11ed/FLAG4d6b415b6 [2021-08-26 02:32:33,428 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:32:33,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2021-08-26 02:32:33,445 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6ed47c4a/393e7841487a4b0f9bf2bb144fce11ed/FLAG4d6b415b6 [2021-08-26 02:32:33,833 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6ed47c4a/393e7841487a4b0f9bf2bb144fce11ed [2021-08-26 02:32:33,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:32:33,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:32:33,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:32:33,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:32:33,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:32:33,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:32:33" (1/1) ... [2021-08-26 02:32:33,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36cedcf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:32:33, skipping insertion in model container [2021-08-26 02:32:33,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:32:33" (1/1) ... [2021-08-26 02:32:33,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:32:33,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:32:34,112 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/list-ext2-properties/simple_and_skiplist_2lvl-2.i[24020,24033] [2021-08-26 02:32:34,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:32:34,135 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:32:34,197 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/list-ext2-properties/simple_and_skiplist_2lvl-2.i[24020,24033] [2021-08-26 02:32:34,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:32:34,228 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:32:34,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:32:34 WrapperNode [2021-08-26 02:32:34,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:32:34,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:32:34,230 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:32:34,230 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:32:34,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:32:34" (1/1) ... [2021-08-26 02:32:34,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:32:34" (1/1) ... [2021-08-26 02:32:34,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:32:34,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:32:34,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:32:34,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:32:34,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:32:34" (1/1) ... [2021-08-26 02:32:34,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:32:34" (1/1) ... [2021-08-26 02:32:34,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:32:34" (1/1) ... [2021-08-26 02:32:34,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:32:34" (1/1) ... [2021-08-26 02:32:34,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:32:34" (1/1) ... [2021-08-26 02:32:34,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:32:34" (1/1) ... [2021-08-26 02:32:34,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:32:34" (1/1) ... [2021-08-26 02:32:34,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:32:34,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:32:34,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:32:34,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:32:34,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:32:34" (1/1) ... [2021-08-26 02:32:34,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:32:34,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:32:34,359 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) [2021-08-26 02:32:34,363 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 [2021-08-26 02:32:34,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-26 02:32:34,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:32:34,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:32:34,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:32:34,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:32:34,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-26 02:32:34,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:32:34,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-26 02:32:34,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:32:34,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:32:35,077 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:32:35,078 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-08-26 02:32:35,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:32:35 BoogieIcfgContainer [2021-08-26 02:32:35,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:32:35,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:32:35,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:32:35,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:32:35,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:32:33" (1/3) ... [2021-08-26 02:32:35,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c46cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:32:35, skipping insertion in model container [2021-08-26 02:32:35,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:32:34" (2/3) ... [2021-08-26 02:32:35,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c46cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:32:35, skipping insertion in model container [2021-08-26 02:32:35,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:32:35" (3/3) ... [2021-08-26 02:32:35,088 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-2.i [2021-08-26 02:32:35,092 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:32:35,093 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 02:32:35,138 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:32:35,146 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 [2021-08-26 02:32:35,146 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 02:32:35,162 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:32:35,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 02:32:35,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:32:35,175 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:32:35,176 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:32:35,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:32:35,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2102156727, now seen corresponding path program 1 times [2021-08-26 02:32:35,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:32:35,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839718241] [2021-08-26 02:32:35,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:32:35,193 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:32:35,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:32:35,201 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) [2021-08-26 02:32:35,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-26 02:32:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:32:35,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 02:32:35,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:32:35,470 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-26 02:32:35,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2021-08-26 02:32:35,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-26 02:32:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:32:35,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:32:35,591 INFO L354 Elim1Store]: treesize reduction 28, result has 22.2 percent of original size [2021-08-26 02:32:35,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 16 [2021-08-26 02:32:35,617 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-08-26 02:32:35,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-08-26 02:32:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:32:35,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:32:35,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839718241] [2021-08-26 02:32:35,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839718241] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:32:35,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:32:35,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-08-26 02:32:35,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551871389] [2021-08-26 02:32:35,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:32:35,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:32:35,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:32:35,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:32:35,677 INFO L87 Difference]: Start difference. First operand has 33 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2021-08-26 02:32:36,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:32:36,231 INFO L93 Difference]: Finished difference Result 89 states and 132 transitions. [2021-08-26 02:32:36,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:32:36,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2021-08-26 02:32:36,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:32:36,241 INFO L225 Difference]: With dead ends: 89 [2021-08-26 02:32:36,241 INFO L226 Difference]: Without dead ends: 25 [2021-08-26 02:32:36,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:32:36,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-26 02:32:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2021-08-26 02:32:36,267 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) [2021-08-26 02:32:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-26 02:32:36,269 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 9 [2021-08-26 02:32:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:32:36,269 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-26 02:32:36,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2021-08-26 02:32:36,270 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-26 02:32:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 02:32:36,270 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:32:36,271 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:32:36,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-26 02:32:36,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:32:36,482 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:32:36,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:32:36,482 INFO L82 PathProgramCache]: Analyzing trace with hash 437717459, now seen corresponding path program 1 times [2021-08-26 02:32:36,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:32:36,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329612030] [2021-08-26 02:32:36,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:32:36,484 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:32:36,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:32:36,488 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) [2021-08-26 02:32:36,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-26 02:32:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:32:36,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 02:32:36,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:32:36,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:32:36,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:32:36,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-08-26 02:32:36,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-08-26 02:32:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:32:36,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:32:36,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-08-26 02:32:36,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:36,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:32:36,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:32:36,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329612030] [2021-08-26 02:32:36,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329612030] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-26 02:32:36,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:32:36,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-26 02:32:36,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574693992] [2021-08-26 02:32:36,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:32:36,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:32:36,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:32:36,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:32:36,901 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) [2021-08-26 02:32:37,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:32:37,033 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-08-26 02:32:37,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 02:32:37,034 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 [2021-08-26 02:32:37,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:32:37,035 INFO L225 Difference]: With dead ends: 31 [2021-08-26 02:32:37,035 INFO L226 Difference]: Without dead ends: 21 [2021-08-26 02:32:37,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:32:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-26 02:32:37,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2021-08-26 02:32:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2021-08-26 02:32:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-08-26 02:32:37,038 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-08-26 02:32:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:32:37,038 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-08-26 02:32:37,039 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) [2021-08-26 02:32:37,039 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-08-26 02:32:37,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 02:32:37,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:32:37,039 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:32:37,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-26 02:32:37,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:32:37,240 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:32:37,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:32:37,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1803058100, now seen corresponding path program 1 times [2021-08-26 02:32:37,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:32:37,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282516673] [2021-08-26 02:32:37,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:32:37,242 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:32:37,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:32:37,243 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) [2021-08-26 02:32:37,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-26 02:32:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:32:37,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 02:32:37,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:32:37,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:32:37,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:32:37,483 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:32:37,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-08-26 02:32:37,575 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-26 02:32:37,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-08-26 02:32:37,654 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-08-26 02:32:37,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 22 [2021-08-26 02:32:37,734 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:32:37,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-08-26 02:32:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:32:37,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:32:50,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2816 treesize of output 2784 [2021-08-26 02:32:50,473 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:32:50,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282516673] [2021-08-26 02:32:50,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-08-26 02:32:50,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1418257651] [2021-08-26 02:32:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:32:50,474 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-26 02:32:50,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-26 02:32:50,489 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-26 02:32:50,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-08-26 02:32:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:32:50,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 02:32:50,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:32:50,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:32:50,853 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:32:50,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-08-26 02:32:50,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:32:51,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:32:51,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-08-26 02:32:51,103 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:32:51,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 22 [2021-08-26 02:32:51,201 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:32:51,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-08-26 02:32:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:32:51,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:32:51,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 650 treesize of output 642 [2021-08-26 02:32:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:32:55,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1418257651] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-26 02:32:55,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:32:55,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-26 02:32:55,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626135128] [2021-08-26 02:32:55,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 02:32:55,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:32:55,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 02:32:55,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=301, Unknown=5, NotChecked=0, Total=380 [2021-08-26 02:32:55,108 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) [2021-08-26 02:32:58,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:32:58,912 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-08-26 02:32:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 02:32:58,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) Word has length 12 [2021-08-26 02:32:58,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:32:58,913 INFO L225 Difference]: With dead ends: 28 [2021-08-26 02:32:58,914 INFO L226 Difference]: Without dead ends: 26 [2021-08-26 02:32:58,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 17815.6ms TimeCoverageRelationStatistics Valid=197, Invalid=609, Unknown=6, NotChecked=0, Total=812 [2021-08-26 02:32:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-26 02:32:58,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2021-08-26 02:32:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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) [2021-08-26 02:32:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-08-26 02:32:58,917 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-08-26 02:32:58,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:32:58,918 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-08-26 02:32:58,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) [2021-08-26 02:32:58,918 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-08-26 02:32:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 02:32:58,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:32:58,919 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:32:58,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-08-26 02:32:59,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-26 02:32:59,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:32:59,322 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:32:59,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:32:59,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2038046946, now seen corresponding path program 1 times [2021-08-26 02:32:59,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:32:59,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880294957] [2021-08-26 02:32:59,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:32:59,323 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:32:59,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:32:59,324 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) [2021-08-26 02:32:59,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-26 02:32:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:32:59,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 02:32:59,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:32:59,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:32:59,516 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:32:59,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-26 02:32:59,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-08-26 02:32:59,691 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-08-26 02:32:59,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 221 treesize of output 145 [2021-08-26 02:32:59,742 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-08-26 02:32:59,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 118 [2021-08-26 02:32:59,811 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-08-26 02:32:59,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 109 [2021-08-26 02:32:59,832 INFO L354 Elim1Store]: treesize reduction 75, result has 20.2 percent of original size [2021-08-26 02:32:59,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 72 [2021-08-26 02:32:59,957 INFO L354 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2021-08-26 02:32:59,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 51 [2021-08-26 02:32:59,965 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-26 02:32:59,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2021-08-26 02:32:59,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-26 02:33:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:33:00,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:33:00,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 334 treesize of output 295 [2021-08-26 02:33:00,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:33:00,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 101 [2021-08-26 02:33:00,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:33:00,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:33:00,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:33:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:33:02,666 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:33:02,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880294957] [2021-08-26 02:33:02,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880294957] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-26 02:33:02,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:33:02,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-26 02:33:02,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919022] [2021-08-26 02:33:02,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 02:33:02,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:33:02,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 02:33:02,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=105, Unknown=1, NotChecked=0, Total=132 [2021-08-26 02:33:02,668 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:33:05,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:33:05,121 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-08-26 02:33:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 02:33:05,122 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 02:33:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:33:05,123 INFO L225 Difference]: With dead ends: 31 [2021-08-26 02:33:05,123 INFO L226 Difference]: Without dead ends: 29 [2021-08-26 02:33:05,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2429.5ms TimeCoverageRelationStatistics Valid=64, Invalid=241, Unknown=1, NotChecked=0, Total=306 [2021-08-26 02:33:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-26 02:33:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2021-08-26 02:33:05,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:33:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-08-26 02:33:05,127 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2021-08-26 02:33:05,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:33:05,127 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-08-26 02:33:05,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:33:05,127 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-08-26 02:33:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 02:33:05,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:33:05,128 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:33:05,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-26 02:33:05,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:33:05,339 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:33:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:33:05,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1794065652, now seen corresponding path program 2 times [2021-08-26 02:33:05,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:33:05,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146920576] [2021-08-26 02:33:05,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:33:05,340 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:33:05,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:33:05,341 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) [2021-08-26 02:33:05,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-26 02:33:05,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:33:05,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:33:05,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 02:33:05,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:33:05,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:33:05,584 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:33:05,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-08-26 02:33:05,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:33:05,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-08-26 02:33:05,793 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-08-26 02:33:05,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 98 [2021-08-26 02:33:05,813 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-26 02:33:05,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 75 [2021-08-26 02:33:05,846 INFO L354 Elim1Store]: treesize reduction 94, result has 16.8 percent of original size [2021-08-26 02:33:05,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 62 [2021-08-26 02:33:06,119 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-08-26 02:33:06,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 47 [2021-08-26 02:33:06,126 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:33:06,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 22 [2021-08-26 02:33:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:33:06,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:33:06,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3298 treesize of output 3274 [2021-08-26 02:33:15,400 WARN L207 SmtUtils]: Spent 8.71 s on a formula simplification. DAG size of input: 410 DAG size of output: 263 [2021-08-26 02:33:15,402 INFO L354 Elim1Store]: treesize reduction 805, result has 44.9 percent of original size [2021-08-26 02:33:15,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 15 new quantified variables, introduced 92 case distinctions, treesize of input 2989090 treesize of output 2882614 [2021-08-26 02:35:18,056 WARN L207 SmtUtils]: Spent 2.04 m on a formula simplification. DAG size of input: 1149 DAG size of output: 1146 [2021-08-26 02:35:24,426 WARN L207 SmtUtils]: Spent 6.36 s on a formula simplification that was a NOOP. DAG size: 1121 [2021-08-26 02:35:24,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:35:24,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1708434 treesize of output 1708078 [2021-08-26 02:35:31,564 WARN L207 SmtUtils]: Spent 6.62 s on a formula simplification that was a NOOP. DAG size: 1166 [2021-08-26 02:35:31,602 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:35:31,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146920576] [2021-08-26 02:35:31,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-08-26 02:35:31,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1119812747] [2021-08-26 02:35:31,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:35:31,603 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-26 02:35:31,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-26 02:35:31,609 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-26 02:35:31,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-08-26 02:35:31,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:35:31,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:35:31,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 02:35:31,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:35:31,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:35:31,893 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:35:31,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-08-26 02:35:31,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:35:31,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-08-26 02:35:32,032 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-08-26 02:35:32,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 98 [2021-08-26 02:35:32,054 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-26 02:35:32,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 75 [2021-08-26 02:35:32,082 INFO L354 Elim1Store]: treesize reduction 94, result has 16.8 percent of original size [2021-08-26 02:35:32,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 62 [2021-08-26 02:35:32,271 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-08-26 02:35:32,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 47 [2021-08-26 02:35:32,277 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:35:32,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 22 [2021-08-26 02:35:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:35:32,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:35:34,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3298 treesize of output 3274 [2021-08-26 02:35:42,013 WARN L207 SmtUtils]: Spent 7.43 s on a formula simplification. DAG size of input: 410 DAG size of output: 263 [2021-08-26 02:35:42,015 INFO L354 Elim1Store]: treesize reduction 805, result has 44.9 percent of original size [2021-08-26 02:35:42,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 15 new quantified variables, introduced 92 case distinctions, treesize of input 2832678 treesize of output 2729402 [2021-08-26 02:37:35,423 WARN L207 SmtUtils]: Spent 1.89 m on a formula simplification. DAG size of input: 1217 DAG size of output: 1169 [2021-08-26 02:37:41,118 WARN L207 SmtUtils]: Spent 5.69 s on a formula simplification that was a NOOP. DAG size: 1135 [2021-08-26 02:37:41,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:37:41,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1533606 treesize of output 1533250 [2021-08-26 02:37:47,168 WARN L207 SmtUtils]: Spent 5.61 s on a formula simplification that was a NOOP. DAG size: 1180 [2021-08-26 02:37:47,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-08-26 02:37:47,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983675904] [2021-08-26 02:37:47,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:37:47,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:37:47,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:37:47,209 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) [2021-08-26 02:37:47,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 02:37:47,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:37:47,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:37:47,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 02:37:47,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:37:47,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:37:47,481 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:37:47,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-08-26 02:37:47,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:37:47,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-08-26 02:37:47,637 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-08-26 02:37:47,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 98 [2021-08-26 02:37:47,663 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-26 02:37:47,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 75 [2021-08-26 02:37:47,692 INFO L354 Elim1Store]: treesize reduction 94, result has 16.8 percent of original size [2021-08-26 02:37:47,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 62 [2021-08-26 02:37:47,888 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-08-26 02:37:47,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 47 [2021-08-26 02:37:47,893 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:37:47,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 22 [2021-08-26 02:37:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:37:47,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:37:50,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3298 treesize of output 3274 [2021-08-26 02:37:57,267 WARN L207 SmtUtils]: Spent 7.09 s on a formula simplification. DAG size of input: 410 DAG size of output: 263 [2021-08-26 02:37:57,268 INFO L354 Elim1Store]: treesize reduction 805, result has 44.9 percent of original size [2021-08-26 02:37:57,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 15 new quantified variables, introduced 92 case distinctions, treesize of input 2917382 treesize of output 2811418 [2021-08-26 02:39:54,182 WARN L207 SmtUtils]: Spent 1.95 m on a formula simplification. DAG size of input: 1291 DAG size of output: 1211 [2021-08-26 02:40:22,124 WARN L207 SmtUtils]: Spent 27.94 s on a formula simplification. DAG size of input: 1171 DAG size of output: 1167 [2021-08-26 02:40:22,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:40:22,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1569958 treesize of output 1569602 [2021-08-26 02:40:28,464 WARN L207 SmtUtils]: Spent 5.91 s on a formula simplification that was a NOOP. DAG size: 1219 [2021-08-26 02:40:28,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-08-26 02:40:28,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:40:28,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-26 02:40:28,496 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-26 02:40:28,496 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-26 02:40:28,500 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:40:28,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 02:40:28,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-08-26 02:40:28,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-26 02:40:29,127 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,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:40:29,131 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 02:40:29,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:40:29 BoogieIcfgContainer [2021-08-26 02:40:29,141 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 02:40:29,142 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 02:40:29,142 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 02:40:29,142 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 02:40:29,143 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:32:35" (3/4) ... [2021-08-26 02:40:29,145 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-26 02:40:29,145 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 02:40:29,147 INFO L168 Benchmark]: Toolchain (without parser) took 475308.76 ms. Allocated memory was 60.8 MB in the beginning and 824.2 MB in the end (delta: 763.4 MB). Free memory was 38.4 MB in the beginning and 597.8 MB in the end (delta: -559.3 MB). Peak memory consumption was 204.0 MB. Max. memory is 16.1 GB. [2021-08-26 02:40:29,147 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 43.2 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:40:29,148 INFO L168 Benchmark]: CACSL2BoogieTranslator took 390.09 ms. Allocated memory is still 60.8 MB. Free memory was 38.2 MB in the beginning and 35.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 02:40:29,148 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.24 ms. Allocated memory is still 60.8 MB. Free memory was 35.9 MB in the beginning and 33.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:40:29,148 INFO L168 Benchmark]: Boogie Preprocessor took 30.23 ms. Allocated memory is still 60.8 MB. Free memory was 33.4 MB in the beginning and 31.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:40:29,148 INFO L168 Benchmark]: RCFGBuilder took 774.71 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 31.1 MB in the beginning and 50.8 MB in the end (delta: -19.7 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. [2021-08-26 02:40:29,149 INFO L168 Benchmark]: TraceAbstraction took 474058.82 ms. Allocated memory was 73.4 MB in the beginning and 824.2 MB in the end (delta: 750.8 MB). Free memory was 50.2 MB in the beginning and 598.8 MB in the end (delta: -548.6 MB). Peak memory consumption was 497.5 MB. Max. memory is 16.1 GB. [2021-08-26 02:40:29,149 INFO L168 Benchmark]: Witness Printer took 3.76 ms. Allocated memory is still 824.2 MB. Free memory was 598.8 MB in the beginning and 597.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:40:29,150 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 43.2 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 390.09 ms. Allocated memory is still 60.8 MB. Free memory was 38.2 MB in the beginning and 35.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.24 ms. Allocated memory is still 60.8 MB. Free memory was 35.9 MB in the beginning and 33.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.23 ms. Allocated memory is still 60.8 MB. Free memory was 33.4 MB in the beginning and 31.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 774.71 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 31.1 MB in the beginning and 50.8 MB in the end (delta: -19.7 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 474058.82 ms. Allocated memory was 73.4 MB in the beginning and 824.2 MB in the end (delta: 750.8 MB). Free memory was 50.2 MB in the beginning and 598.8 MB in the end (delta: -548.6 MB). Peak memory consumption was 497.5 MB. Max. memory is 16.1 GB. * Witness Printer took 3.76 ms. Allocated memory is still 824.2 MB. Free memory was 598.8 MB in the beginning and 597.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 612]: 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: [L596] List a = (List) malloc(sizeof(struct node)); [L597] COND FALSE !(a == 0) [L598] List t; [L599] List p = a; [L600] COND TRUE __VERIFIER_nondet_int() [L601] p->h = 1 [L602] t = (List) malloc(sizeof(struct node)) [L603] COND FALSE !(t == 0) [L604] p->n = t [L605] EXPR p->n [L605] p = p->n [L600] COND FALSE !(__VERIFIER_nondet_int()) [L607] p->h = 1 [L608] p->n = 0 [L609] p = a [L610] COND TRUE p!=0 [L611] EXPR p->h [L611] COND FALSE !(p->h != 1) [L614] EXPR p->n [L614] p = p->n [L610] COND TRUE p!=0 [L611] EXPR p->h [L611] COND FALSE !(p->h != 1) [L614] EXPR p->n [L614] p = p->n [L610] COND TRUE p!=0 [L611] EXPR p->h [L611] COND TRUE p->h != 1 [L612] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 473994.4ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 18.3ms, AutomataDifference: 6983.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 56 SDtfs, 118 SDslu, 165 SDs, 0 SdLazy, 254 SolverSat, 82 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3706.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 124 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 20354.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 22.6ms AutomataMinimizationTime, 4 MinimizatonAttempts, 31 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 45.3ms SsaConstructionTime, 114.0ms SatisfiabilityAnalysisTime, 8359.3ms InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 88 ConstructedInterpolants, 9 QuantifiedInterpolants, 1149 SizeOfPredicates, 30 NumberOfNonLiveVariables, 198 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 2/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-26 02:40:29,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...