./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-data/min_max.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/heap-data/min_max.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 6f3dc8ca7e9d6160ebf6e1f17d4641cf9f9e9c7a0130658f0fd8bbb7edc9643d --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:47:12,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:47:12,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:47:12,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:47:12,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:47:12,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:47:12,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:47:12,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:47:12,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:47:12,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:47:12,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:47:12,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:47:12,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:47:12,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:47:12,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:47:12,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:47:12,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:47:12,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:47:12,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:47:12,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:47:12,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:47:12,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:47:12,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:47:12,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:47:12,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:47:12,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:47:12,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:47:12,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:47:12,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:47:12,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:47:12,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:47:12,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:47:12,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:47:12,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:47:12,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:47:12,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:47:12,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:47:12,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:47:12,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:47:12,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:47:12,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:47:12,641 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:47:12,656 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:47:12,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:47:12,659 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:47:12,659 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:47:12,660 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:47:12,661 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:47:12,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:47:12,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:47:12,662 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:47:12,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:47:12,662 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:47:12,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:47:12,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:47:12,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:47:12,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:47:12,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:47:12,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:47:12,664 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:47:12,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:47:12,664 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:47:12,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:47:12,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:47:12,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:47:12,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:47:12,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:47:12,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:47:12,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:47:12,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:47:12,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:47:12,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:47:12,666 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:47:12,666 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:47:12,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:47:12,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:47:12,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f3dc8ca7e9d6160ebf6e1f17d4641cf9f9e9c7a0130658f0fd8bbb7edc9643d [2021-12-15 10:47:12,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:47:12,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:47:12,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:47:12,918 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:47:12,919 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:47:12,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/min_max.i [2021-12-15 10:47:12,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4c98326e/9d275ba0b1ba4e2eb7d5a636f89be1b7/FLAG0741e0e68 [2021-12-15 10:47:13,395 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:47:13,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/min_max.i [2021-12-15 10:47:13,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4c98326e/9d275ba0b1ba4e2eb7d5a636f89be1b7/FLAG0741e0e68 [2021-12-15 10:47:13,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4c98326e/9d275ba0b1ba4e2eb7d5a636f89be1b7 [2021-12-15 10:47:13,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:47:13,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:47:13,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:47:13,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:47:13,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:47:13,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:47:13" (1/1) ... [2021-12-15 10:47:13,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2864e82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:13, skipping insertion in model container [2021-12-15 10:47:13,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:47:13" (1/1) ... [2021-12-15 10:47:13,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:47:13,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:47:14,275 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/min_max.i[23535,23548] [2021-12-15 10:47:14,278 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/min_max.i[23590,23603] [2021-12-15 10:47:14,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:47:14,286 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:47:14,323 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/min_max.i[23535,23548] [2021-12-15 10:47:14,326 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/min_max.i[23590,23603] [2021-12-15 10:47:14,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:47:14,353 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:47:14,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:14 WrapperNode [2021-12-15 10:47:14,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:47:14,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:47:14,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:47:14,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:47:14,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:14" (1/1) ... [2021-12-15 10:47:14,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:14" (1/1) ... [2021-12-15 10:47:14,398 INFO L137 Inliner]: procedures = 121, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2021-12-15 10:47:14,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:47:14,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:47:14,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:47:14,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:47:14,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:14" (1/1) ... [2021-12-15 10:47:14,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:14" (1/1) ... [2021-12-15 10:47:14,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:14" (1/1) ... [2021-12-15 10:47:14,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:14" (1/1) ... [2021-12-15 10:47:14,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:14" (1/1) ... [2021-12-15 10:47:14,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:14" (1/1) ... [2021-12-15 10:47:14,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:14" (1/1) ... [2021-12-15 10:47:14,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:47:14,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:47:14,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:47:14,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:47:14,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:14" (1/1) ... [2021-12-15 10:47:14,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:47:14,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:14,466 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 10:47:14,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 10:47:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 10:47:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 10:47:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 10:47:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:47:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 10:47:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 10:47:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:47:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:47:14,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:47:14,573 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:47:14,588 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:47:14,732 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:47:14,736 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:47:14,736 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 10:47:14,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:47:14 BoogieIcfgContainer [2021-12-15 10:47:14,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:47:14,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:47:14,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:47:14,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:47:14,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:47:13" (1/3) ... [2021-12-15 10:47:14,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486fa42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:47:14, skipping insertion in model container [2021-12-15 10:47:14,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:47:14" (2/3) ... [2021-12-15 10:47:14,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486fa42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:47:14, skipping insertion in model container [2021-12-15 10:47:14,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:47:14" (3/3) ... [2021-12-15 10:47:14,747 INFO L111 eAbstractionObserver]: Analyzing ICFG min_max.i [2021-12-15 10:47:14,751 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:47:14,751 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 10:47:14,792 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:47:14,802 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 10:47:14,802 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 10:47:14,820 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 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) [2021-12-15 10:47:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 10:47:14,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:14,829 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:14,830 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:14,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:14,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1825905474, now seen corresponding path program 1 times [2021-12-15 10:47:14,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:14,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630392130] [2021-12-15 10:47:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:14,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:14,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:14,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630392130] [2021-12-15 10:47:14,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630392130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:47:14,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:47:14,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:47:14,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673957671] [2021-12-15 10:47:14,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:47:14,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 10:47:14,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:14,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 10:47:14,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:47:14,964 INFO L87 Difference]: Start difference. First operand has 20 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:14,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:14,973 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-12-15 10:47:14,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 10:47:14,975 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-15 10:47:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:14,980 INFO L225 Difference]: With dead ends: 33 [2021-12-15 10:47:14,980 INFO L226 Difference]: Without dead ends: 17 [2021-12-15 10:47:14,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:47:14,985 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:14,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:47:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-15 10:47:15,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-15 10:47:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-12-15 10:47:15,009 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 7 [2021-12-15 10:47:15,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:15,009 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-12-15 10:47:15,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-12-15 10:47:15,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 10:47:15,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:15,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:15,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:47:15,011 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:15,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:15,012 INFO L85 PathProgramCache]: Analyzing trace with hash 178093936, now seen corresponding path program 1 times [2021-12-15 10:47:15,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:15,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109681137] [2021-12-15 10:47:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:15,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:15,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:15,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109681137] [2021-12-15 10:47:15,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109681137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:47:15,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:47:15,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 10:47:15,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219086974] [2021-12-15 10:47:15,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:47:15,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:47:15,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:47:15,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:47:15,158 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:15,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:15,204 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-12-15 10:47:15,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:47:15,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-15 10:47:15,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:15,207 INFO L225 Difference]: With dead ends: 30 [2021-12-15 10:47:15,207 INFO L226 Difference]: Without dead ends: 19 [2021-12-15 10:47:15,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:47:15,212 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:15,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:47:15,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-15 10:47:15,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-15 10:47:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-12-15 10:47:15,222 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2021-12-15 10:47:15,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:15,224 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-12-15 10:47:15,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:15,225 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-12-15 10:47:15,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 10:47:15,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:15,226 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:15,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:47:15,227 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:15,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:15,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1651856839, now seen corresponding path program 1 times [2021-12-15 10:47:15,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:15,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327967630] [2021-12-15 10:47:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:15,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:15,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:15,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327967630] [2021-12-15 10:47:15,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327967630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:47:15,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:47:15,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 10:47:15,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698980224] [2021-12-15 10:47:15,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:47:15,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 10:47:15,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:15,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 10:47:15,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:47:15,434 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-12-15 10:47:15,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:15,514 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-12-15 10:47:15,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 10:47:15,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 [2021-12-15 10:47:15,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:15,517 INFO L225 Difference]: With dead ends: 28 [2021-12-15 10:47:15,517 INFO L226 Difference]: Without dead ends: 26 [2021-12-15 10:47:15,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:47:15,524 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:15,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 39 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:47:15,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-15 10:47:15,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-12-15 10:47:15,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-15 10:47:15,530 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-12-15 10:47:15,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:15,531 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-15 10:47:15,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-12-15 10:47:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-15 10:47:15,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 10:47:15,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:15,532 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:15,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:47:15,533 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:15,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:15,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1703602811, now seen corresponding path program 1 times [2021-12-15 10:47:15,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:15,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459475692] [2021-12-15 10:47:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:15,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:15,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:15,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459475692] [2021-12-15 10:47:15,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459475692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:47:15,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:47:15,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 10:47:15,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079833305] [2021-12-15 10:47:15,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:47:15,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 10:47:15,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:15,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 10:47:15,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:47:15,651 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2021-12-15 10:47:15,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:15,748 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-12-15 10:47:15,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 10:47:15,749 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) Word has length 15 [2021-12-15 10:47:15,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:15,750 INFO L225 Difference]: With dead ends: 40 [2021-12-15 10:47:15,750 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 10:47:15,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-12-15 10:47:15,751 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:15,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 44 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:47:15,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 10:47:15,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-12-15 10:47:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-15 10:47:15,755 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2021-12-15 10:47:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:15,756 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-15 10:47:15,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2021-12-15 10:47:15,756 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-15 10:47:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 10:47:15,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:15,757 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:15,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 10:47:15,757 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:15,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:15,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1911306115, now seen corresponding path program 1 times [2021-12-15 10:47:15,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:15,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786279694] [2021-12-15 10:47:15,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:15,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:15,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:15,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786279694] [2021-12-15 10:47:15,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786279694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:47:15,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:47:15,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 10:47:15,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576686273] [2021-12-15 10:47:15,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:47:15,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 10:47:15,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:15,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 10:47:15,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 10:47:15,847 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-12-15 10:47:15,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:15,898 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-12-15 10:47:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 10:47:15,899 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) Word has length 15 [2021-12-15 10:47:15,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:15,899 INFO L225 Difference]: With dead ends: 55 [2021-12-15 10:47:15,899 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 10:47:15,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-15 10:47:15,900 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:15,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 49 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:47:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 10:47:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-15 10:47:15,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-12-15 10:47:15,904 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2021-12-15 10:47:15,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:15,905 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-12-15 10:47:15,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-12-15 10:47:15,905 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-12-15 10:47:15,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 10:47:15,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:15,905 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:15,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 10:47:15,906 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:15,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:15,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1682596603, now seen corresponding path program 1 times [2021-12-15 10:47:15,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:15,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531871506] [2021-12-15 10:47:15,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:15,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:16,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531871506] [2021-12-15 10:47:16,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531871506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:47:16,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:47:16,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-15 10:47:16,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087210604] [2021-12-15 10:47:16,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:47:16,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 10:47:16,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:16,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 10:47:16,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:47:16,072 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2021-12-15 10:47:16,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:16,183 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-12-15 10:47:16,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 10:47:16,183 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) Word has length 15 [2021-12-15 10:47:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:16,184 INFO L225 Difference]: With dead ends: 36 [2021-12-15 10:47:16,184 INFO L226 Difference]: Without dead ends: 34 [2021-12-15 10:47:16,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-15 10:47:16,185 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:16,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:47:16,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-15 10:47:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2021-12-15 10:47:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:16,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-15 10:47:16,189 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2021-12-15 10:47:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:16,189 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-15 10:47:16,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2021-12-15 10:47:16,190 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-15 10:47:16,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 10:47:16,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:16,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:16,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 10:47:16,191 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:16,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:16,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1593313461, now seen corresponding path program 1 times [2021-12-15 10:47:16,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:16,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906550451] [2021-12-15 10:47:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:16,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:16,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:16,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906550451] [2021-12-15 10:47:16,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906550451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:16,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550397353] [2021-12-15 10:47:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:16,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:16,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:16,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:47:16,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 10:47:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:16,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-15 10:47:16,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:16,371 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 [2021-12-15 10:47:16,377 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 [2021-12-15 10:47:16,490 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 15 treesize of output 7 [2021-12-15 10:47:16,493 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 [2021-12-15 10:47:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:16,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:16,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550397353] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:16,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:16,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2021-12-15 10:47:16,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105354737] [2021-12-15 10:47:16,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:16,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 10:47:16,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:16,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 10:47:16,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:47:16,630 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 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) [2021-12-15 10:47:16,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:16,777 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-12-15 10:47:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 10:47:16,777 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-15 10:47:16,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:16,778 INFO L225 Difference]: With dead ends: 46 [2021-12-15 10:47:16,778 INFO L226 Difference]: Without dead ends: 30 [2021-12-15 10:47:16,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-12-15 10:47:16,779 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:16,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 105 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:47:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-15 10:47:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-15 10:47:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-12-15 10:47:16,782 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2021-12-15 10:47:16,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:16,782 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-12-15 10:47:16,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 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) [2021-12-15 10:47:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-12-15 10:47:16,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 10:47:16,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:16,783 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:16,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:17,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:17,001 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:17,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1667695916, now seen corresponding path program 2 times [2021-12-15 10:47:17,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:17,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690471713] [2021-12-15 10:47:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:17,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:47:17,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:17,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690471713] [2021-12-15 10:47:17,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690471713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:17,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89709887] [2021-12-15 10:47:17,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:47:17,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:17,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:17,107 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:47:17,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 10:47:17,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:47:17,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:47:17,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 10:47:17,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:17,286 INFO L354 Elim1Store]: treesize reduction 77, result has 31.9 percent of original size [2021-12-15 10:47:17,287 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 35 treesize of output 49 [2021-12-15 10:47:17,320 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 19 treesize of output 7 [2021-12-15 10:47:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:47:17,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:17,407 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 19 treesize of output 7 [2021-12-15 10:47:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:47:17,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89709887] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:17,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:17,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2021-12-15 10:47:17,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842034740] [2021-12-15 10:47:17,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:17,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 10:47:17,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:17,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 10:47:17,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-15 10:47:17,413 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) [2021-12-15 10:47:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:17,554 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2021-12-15 10:47:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 10:47:17,555 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-15 10:47:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:17,556 INFO L225 Difference]: With dead ends: 74 [2021-12-15 10:47:17,556 INFO L226 Difference]: Without dead ends: 55 [2021-12-15 10:47:17,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-12-15 10:47:17,557 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:17,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 177 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-12-15 10:47:17,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-15 10:47:17,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2021-12-15 10:47:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 34 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) [2021-12-15 10:47:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-12-15 10:47:17,561 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2021-12-15 10:47:17,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:17,561 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-12-15 10:47:17,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) [2021-12-15 10:47:17,562 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-12-15 10:47:17,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 10:47:17,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:17,562 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:17,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:17,790 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,SelfDestructingSolverStorable7 [2021-12-15 10:47:17,790 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:17,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:17,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1409530478, now seen corresponding path program 1 times [2021-12-15 10:47:17,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:17,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467435298] [2021-12-15 10:47:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:17,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:17,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:17,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467435298] [2021-12-15 10:47:17,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467435298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:17,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493665336] [2021-12-15 10:47:17,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:17,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:17,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:17,975 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:47:18,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 10:47:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:18,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-15 10:47:18,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:18,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 10:47:18,065 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 [2021-12-15 10:47:18,143 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 [2021-12-15 10:47:18,147 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 [2021-12-15 10:47:18,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:18,152 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 18 treesize of output 20 [2021-12-15 10:47:18,158 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-15 10:47:18,158 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 15 treesize of output 15 [2021-12-15 10:47:18,287 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 27 treesize of output 15 [2021-12-15 10:47:18,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-12-15 10:47:18,304 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 [2021-12-15 10:47:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:18,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:18,379 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~l~0#1.base_13| Int) (v_ArrVal_196 (Array Int Int))) (or (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_13|))) (<= |c_ULTIMATE.start_main_~min~0#1| (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_13| v_ArrVal_196) |c_ULTIMATE.start_main_~l~0#1.base|) (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4))))) is different from false [2021-12-15 10:47:18,434 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~l~0#1.base_13| Int) (v_ArrVal_196 (Array Int Int))) (or (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_13|))) (<= |c_ULTIMATE.start_main_#t~mem6#1| (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_13| v_ArrVal_196) |c_ULTIMATE.start_main_~l~0#1.base|) (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4))))) is different from false [2021-12-15 10:47:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-12-15 10:47:18,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493665336] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:18,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:18,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2021-12-15 10:47:18,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418763111] [2021-12-15 10:47:18,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:18,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 10:47:18,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:18,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 10:47:18,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=202, Unknown=2, NotChecked=58, Total=306 [2021-12-15 10:47:18,446 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:18,851 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-12-15 10:47:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 10:47:18,851 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 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 23 [2021-12-15 10:47:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:18,852 INFO L225 Difference]: With dead ends: 45 [2021-12-15 10:47:18,852 INFO L226 Difference]: Without dead ends: 43 [2021-12-15 10:47:18,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=351, Unknown=2, NotChecked=82, Total=552 [2021-12-15 10:47:18,852 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 99 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:18,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 85 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 145 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2021-12-15 10:47:18,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-15 10:47:18,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-12-15 10:47:18,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 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) [2021-12-15 10:47:18,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-12-15 10:47:18,856 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 23 [2021-12-15 10:47:18,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:18,856 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-12-15 10:47:18,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:18,856 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-12-15 10:47:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 10:47:18,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:18,857 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:18,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:19,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:19,058 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:19,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1643965548, now seen corresponding path program 1 times [2021-12-15 10:47:19,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:19,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39548113] [2021-12-15 10:47:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:19,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:19,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:19,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39548113] [2021-12-15 10:47:19,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39548113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:19,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772296420] [2021-12-15 10:47:19,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:19,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:19,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:19,288 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:47:19,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 10:47:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:19,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-15 10:47:19,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:19,392 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 [2021-12-15 10:47:19,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 10:47:19,443 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 [2021-12-15 10:47:19,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:19,447 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 18 treesize of output 20 [2021-12-15 10:47:19,453 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-15 10:47:19,453 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 15 treesize of output 15 [2021-12-15 10:47:19,460 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 [2021-12-15 10:47:19,578 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 27 treesize of output 15 [2021-12-15 10:47:19,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-12-15 10:47:19,600 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 [2021-12-15 10:47:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:19,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:19,703 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~l~0#1.base_16| Int) (v_ArrVal_253 (Array Int Int))) (or (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_16|))) (<= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_16| v_ArrVal_253) |c_ULTIMATE.start_main_~l~0#1.base|) (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4)) |c_ULTIMATE.start_main_~max~0#1|))) is different from false [2021-12-15 10:47:19,735 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~l~0#1.base_16| Int) (v_ArrVal_253 (Array Int Int))) (or (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_16|))) (<= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_16| v_ArrVal_253) |c_ULTIMATE.start_main_~l~0#1.base|) (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))))) is different from false [2021-12-15 10:47:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-12-15 10:47:19,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772296420] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:19,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:19,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 18 [2021-12-15 10:47:19,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153295459] [2021-12-15 10:47:19,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:19,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 10:47:19,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:19,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 10:47:19,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=201, Unknown=2, NotChecked=58, Total=306 [2021-12-15 10:47:19,759 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:20,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:20,212 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-12-15 10:47:20,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 10:47:20,212 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 10:47:20,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:20,213 INFO L225 Difference]: With dead ends: 86 [2021-12-15 10:47:20,213 INFO L226 Difference]: Without dead ends: 84 [2021-12-15 10:47:20,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=521, Unknown=2, NotChecked=98, Total=756 [2021-12-15 10:47:20,214 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 100 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:20,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 90 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 212 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2021-12-15 10:47:20,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-15 10:47:20,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2021-12-15 10:47:20,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:20,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-12-15 10:47:20,219 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 25 [2021-12-15 10:47:20,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:20,219 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-12-15 10:47:20,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:20,219 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-12-15 10:47:20,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 10:47:20,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:20,220 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:20,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:20,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:20,434 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:20,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1055550124, now seen corresponding path program 1 times [2021-12-15 10:47:20,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:20,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680520842] [2021-12-15 10:47:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:20,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:20,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:20,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680520842] [2021-12-15 10:47:20,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680520842] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:20,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008494732] [2021-12-15 10:47:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:20,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:20,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:20,816 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:47:20,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 10:47:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:20,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-15 10:47:20,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:20,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 10:47:20,901 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 [2021-12-15 10:47:20,945 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 [2021-12-15 10:47:20,951 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 [2021-12-15 10:47:20,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:20,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 10:47:20,961 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-15 10:47:20,961 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 15 treesize of output 15 [2021-12-15 10:47:21,225 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 [2021-12-15 10:47:21,228 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 23 treesize of output 15 [2021-12-15 10:47:21,751 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-15 10:47:21,752 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 [2021-12-15 10:47:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:21,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:21,935 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~l~0#1.base_19| Int) (v_ArrVal_310 (Array Int Int))) (let ((.cse0 (select v_ArrVal_310 4))) (or (<= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_19| v_ArrVal_310) |c_ULTIMATE.start_main_~l~0#1.base|) (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4)) .cse0) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_19|))) (<= .cse0 |c_ULTIMATE.start_main_~max~0#1|)))) is different from false [2021-12-15 10:47:21,968 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~l~0#1.base_19| Int) (v_ArrVal_310 (Array Int Int))) (let ((.cse0 (select v_ArrVal_310 4))) (or (<= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_19| v_ArrVal_310) |c_ULTIMATE.start_main_~l~0#1.base|) (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4)) .cse0) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_19|))) (<= .cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4)))))) is different from false [2021-12-15 10:47:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-12-15 10:47:22,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008494732] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:22,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:22,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2021-12-15 10:47:22,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247677473] [2021-12-15 10:47:22,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:22,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-15 10:47:22,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:22,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-15 10:47:22,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=477, Unknown=3, NotChecked=90, Total=650 [2021-12-15 10:47:22,012 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:23,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:23,083 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2021-12-15 10:47:23,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-15 10:47:23,084 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 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 [2021-12-15 10:47:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:23,084 INFO L225 Difference]: With dead ends: 108 [2021-12-15 10:47:23,084 INFO L226 Difference]: Without dead ends: 106 [2021-12-15 10:47:23,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=380, Invalid=1605, Unknown=3, NotChecked=174, Total=2162 [2021-12-15 10:47:23,086 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 99 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:23,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 200 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 440 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2021-12-15 10:47:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-15 10:47:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 59. [2021-12-15 10:47:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-12-15 10:47:23,090 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 25 [2021-12-15 10:47:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:23,091 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-12-15 10:47:23,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:23,091 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-12-15 10:47:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 10:47:23,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:23,092 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:23,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:23,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-15 10:47:23,292 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1550473430, now seen corresponding path program 1 times [2021-12-15 10:47:23,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:23,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632979034] [2021-12-15 10:47:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:23,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:23,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:23,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632979034] [2021-12-15 10:47:23,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632979034] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:23,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126090095] [2021-12-15 10:47:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:23,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:23,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:23,480 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:47:23,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 10:47:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:23,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-15 10:47:23,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:23,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 10:47:23,581 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 [2021-12-15 10:47:23,657 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 11 treesize of output 7 [2021-12-15 10:47:23,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:23,662 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 18 treesize of output 20 [2021-12-15 10:47:23,670 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-15 10:47:23,671 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 15 treesize of output 15 [2021-12-15 10:47:23,678 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 [2021-12-15 10:47:23,898 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 31 treesize of output 19 [2021-12-15 10:47:23,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-12-15 10:47:23,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-12-15 10:47:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:23,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:24,146 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_373 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_22| Int)) (let ((.cse0 (select v_ArrVal_373 4))) (or (<= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_22| v_ArrVal_373) |c_ULTIMATE.start_main_~l~0#1.base|) (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4)) .cse0) (< .cse0 |c_ULTIMATE.start_main_~min~0#1|) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_22|)))))) is different from false [2021-12-15 10:47:24,203 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_373 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_22| Int)) (let ((.cse0 (select v_ArrVal_373 4))) (or (< .cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (<= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_22| v_ArrVal_373) |c_ULTIMATE.start_main_~l~0#1.base|) (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4)) .cse0) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_22|)))))) is different from false [2021-12-15 10:47:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-12-15 10:47:24,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126090095] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:24,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:24,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2021-12-15 10:47:24,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045426695] [2021-12-15 10:47:24,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:24,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 10:47:24,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:24,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 10:47:24,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=634, Unknown=2, NotChecked=102, Total=812 [2021-12-15 10:47:24,215 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 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) [2021-12-15 10:47:26,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:26,920 INFO L93 Difference]: Finished difference Result 222 states and 252 transitions. [2021-12-15 10:47:26,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-15 10:47:26,920 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 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 25 [2021-12-15 10:47:26,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:26,921 INFO L225 Difference]: With dead ends: 222 [2021-12-15 10:47:26,921 INFO L226 Difference]: Without dead ends: 220 [2021-12-15 10:47:26,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=901, Invalid=4655, Unknown=2, NotChecked=294, Total=5852 [2021-12-15 10:47:26,923 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 216 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:26,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 325 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 867 Invalid, 0 Unknown, 353 Unchecked, 0.5s Time] [2021-12-15 10:47:26,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-15 10:47:26,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 40. [2021-12-15 10:47:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-15 10:47:26,929 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2021-12-15 10:47:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:26,930 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-15 10:47:26,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 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) [2021-12-15 10:47:26,930 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-15 10:47:26,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-15 10:47:26,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:26,931 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:26,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:27,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:27,144 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:27,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:27,145 INFO L85 PathProgramCache]: Analyzing trace with hash 138316690, now seen corresponding path program 2 times [2021-12-15 10:47:27,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:27,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347778555] [2021-12-15 10:47:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:27,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:27,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:27,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347778555] [2021-12-15 10:47:27,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347778555] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:27,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564108930] [2021-12-15 10:47:27,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:47:27,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:27,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:27,295 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:47:27,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 10:47:27,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:47:27,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:47:27,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-15 10:47:27,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:27,418 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 [2021-12-15 10:47:27,420 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 [2021-12-15 10:47:27,438 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 [2021-12-15 10:47:27,504 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-15 10:47:27,510 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-15 10:47:27,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:27,516 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 16 treesize of output 18 [2021-12-15 10:47:27,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:27,520 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 16 treesize of output 18 [2021-12-15 10:47:27,526 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-15 10:47:27,526 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 15 treesize of output 15 [2021-12-15 10:47:27,793 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-15 10:47:27,793 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 61 treesize of output 35 [2021-12-15 10:47:27,799 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-15 10:47:27,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-15 10:47:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:27,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:27,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:27,915 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2021-12-15 10:47:27,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:27,919 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-12-15 10:47:27,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:27,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:27,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:27,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,003 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_4 (Array Int Int)) (v_arrayElimArr_3 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_26| Int)) (or (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_26|))) (and (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~l~0#1.base_26| v_arrayElimArr_3) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) 0) (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~l~0#1.base_26| v_arrayElimArr_4) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) 0)) (not (= (select v_arrayElimArr_3 0) |c_ULTIMATE.start_main_~l~0#1.offset|)) (not (= (select v_arrayElimArr_4 0) |c_ULTIMATE.start_main_~l~0#1.base|)))) is different from false [2021-12-15 10:47:28,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-15 10:47:28,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:28,363 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 48 [2021-12-15 10:47:28,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:28,404 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2021-12-15 10:47:28,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:28,408 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 33 treesize of output 21 [2021-12-15 10:47:28,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:28,411 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 24 treesize of output 12 [2021-12-15 10:47:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-12-15 10:47:28,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564108930] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:28,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:28,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2021-12-15 10:47:28,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034189803] [2021-12-15 10:47:28,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:28,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-15 10:47:28,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:28,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-15 10:47:28,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=152, Unknown=1, NotChecked=24, Total=210 [2021-12-15 10:47:28,431 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:28,640 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2021-12-15 10:47:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 10:47:28,641 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 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 28 [2021-12-15 10:47:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:28,641 INFO L225 Difference]: With dead ends: 66 [2021-12-15 10:47:28,641 INFO L226 Difference]: Without dead ends: 45 [2021-12-15 10:47:28,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=250, Unknown=1, NotChecked=32, Total=342 [2021-12-15 10:47:28,642 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:28,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 163 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2021-12-15 10:47:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-15 10:47:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-15 10:47:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 44 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) [2021-12-15 10:47:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-12-15 10:47:28,645 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 28 [2021-12-15 10:47:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:28,645 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-12-15 10:47:28,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-12-15 10:47:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-15 10:47:28,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:28,646 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:28,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:28,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:28,847 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:28,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:28,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1254306071, now seen corresponding path program 3 times [2021-12-15 10:47:28,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:28,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618409729] [2021-12-15 10:47:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:28,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 10:47:28,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:28,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618409729] [2021-12-15 10:47:28,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618409729] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:28,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297155887] [2021-12-15 10:47:28,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:47:28,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:28,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:28,918 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:47:28,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 10:47:29,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 10:47:29,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:47:29,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 10:47:29,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:29,045 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 19 treesize of output 7 [2021-12-15 10:47:29,081 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-15 10:47:29,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-15 10:47:29,103 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 19 treesize of output 7 [2021-12-15 10:47:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 10:47:29,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:29,203 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 17 treesize of output 15 [2021-12-15 10:47:29,258 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 19 treesize of output 7 [2021-12-15 10:47:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 10:47:29,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297155887] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:29,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:29,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2021-12-15 10:47:29,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272314857] [2021-12-15 10:47:29,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:29,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 10:47:29,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:29,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 10:47:29,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-15 10:47:29,265 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-12-15 10:47:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:29,380 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2021-12-15 10:47:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 10:47:29,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-15 10:47:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:29,381 INFO L225 Difference]: With dead ends: 148 [2021-12-15 10:47:29,381 INFO L226 Difference]: Without dead ends: 124 [2021-12-15 10:47:29,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-12-15 10:47:29,382 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:29,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 94 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:47:29,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-15 10:47:29,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 52. [2021-12-15 10:47:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-12-15 10:47:29,386 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 33 [2021-12-15 10:47:29,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:29,386 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-12-15 10:47:29,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-12-15 10:47:29,387 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-12-15 10:47:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-15 10:47:29,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:29,387 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:29,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:29,588 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,SelfDestructingSolverStorable13 [2021-12-15 10:47:29,588 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:29,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:29,589 INFO L85 PathProgramCache]: Analyzing trace with hash -334041831, now seen corresponding path program 4 times [2021-12-15 10:47:29,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:29,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800018497] [2021-12-15 10:47:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:29,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:29,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:29,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800018497] [2021-12-15 10:47:29,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800018497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:29,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296881831] [2021-12-15 10:47:29,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:47:29,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:29,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:29,822 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:47:29,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 10:47:29,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:47:29,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:47:29,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-15 10:47:29,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:29,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 10:47:29,929 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 [2021-12-15 10:47:30,013 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 [2021-12-15 10:47:30,018 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 [2021-12-15 10:47:30,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:30,022 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 18 treesize of output 20 [2021-12-15 10:47:30,034 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-15 10:47:30,034 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 21 treesize of output 29 [2021-12-15 10:47:30,132 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-15 10:47:30,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:30,138 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 43 treesize of output 37 [2021-12-15 10:47:30,142 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-15 10:47:30,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:30,147 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 22 treesize of output 24 [2021-12-15 10:47:30,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:30,152 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 18 treesize of output 20 [2021-12-15 10:47:30,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:30,159 INFO L354 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2021-12-15 10:47:30,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-12-15 10:47:30,599 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-15 10:47:30,600 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 89 treesize of output 51 [2021-12-15 10:47:30,608 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-15 10:47:30,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-15 10:47:30,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-12-15 10:47:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:30,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:30,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:30,981 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2021-12-15 10:47:30,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:30,985 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2021-12-15 10:47:31,012 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_10 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_35| Int) (v_ArrVal_609 (Array Int Int)) (v_arrayElimArr_9 (Array Int Int))) (let ((.cse0 (select v_ArrVal_609 4))) (or (< |c_ULTIMATE.start_main_~max~0#1| .cse0) (<= .cse0 (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_35| v_ArrVal_609) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~l~0#1.base_35| v_arrayElimArr_9) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~l~0#1.base_35| v_arrayElimArr_10) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) 4))) (not (= (select v_arrayElimArr_9 0) |c_ULTIMATE.start_main_~l~0#1.base|)) (not (= (select v_arrayElimArr_10 0) |c_ULTIMATE.start_main_~l~0#1.offset|)) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_35|)))))) is different from false [2021-12-15 10:47:31,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:31,148 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 60 [2021-12-15 10:47:31,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:31,153 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 57 treesize of output 45 [2021-12-15 10:47:31,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2021-12-15 10:47:31,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:31,161 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2021-12-15 10:47:31,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:31,164 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 30 treesize of output 22 [2021-12-15 10:47:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-12-15 10:47:31,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296881831] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:31,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:31,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2021-12-15 10:47:31,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937758661] [2021-12-15 10:47:31,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:31,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-15 10:47:31,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:31,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-15 10:47:31,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1007, Unknown=7, NotChecked=64, Total=1190 [2021-12-15 10:47:31,453 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:35,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:35,333 INFO L93 Difference]: Finished difference Result 210 states and 240 transitions. [2021-12-15 10:47:35,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-15 10:47:35,333 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 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 33 [2021-12-15 10:47:35,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:35,335 INFO L225 Difference]: With dead ends: 210 [2021-12-15 10:47:35,335 INFO L226 Difference]: Without dead ends: 208 [2021-12-15 10:47:35,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1164, Invalid=5471, Unknown=11, NotChecked=160, Total=6806 [2021-12-15 10:47:35,338 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 430 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:35,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 436 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1043 Invalid, 0 Unknown, 315 Unchecked, 0.6s Time] [2021-12-15 10:47:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-15 10:47:35,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 55. [2021-12-15 10:47:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 54 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) [2021-12-15 10:47:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-12-15 10:47:35,345 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2021-12-15 10:47:35,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:35,345 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-12-15 10:47:35,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-12-15 10:47:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 10:47:35,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:35,346 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:35,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-15 10:47:35,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 10:47:35,559 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:35,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:35,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1108473179, now seen corresponding path program 2 times [2021-12-15 10:47:35,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:35,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436541515] [2021-12-15 10:47:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:35,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:35,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:35,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436541515] [2021-12-15 10:47:35,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436541515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:35,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680442395] [2021-12-15 10:47:35,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:47:35,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:35,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:35,772 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:47:35,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 10:47:35,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:47:35,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:47:35,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-15 10:47:35,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:35,899 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 [2021-12-15 10:47:35,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 10:47:35,974 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 [2021-12-15 10:47:35,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:35,978 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 18 treesize of output 20 [2021-12-15 10:47:35,987 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-15 10:47:35,987 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 21 treesize of output 29 [2021-12-15 10:47:35,993 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 [2021-12-15 10:47:36,064 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-15 10:47:36,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:36,068 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 43 treesize of output 37 [2021-12-15 10:47:36,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:36,087 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 22 treesize of output 24 [2021-12-15 10:47:36,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:36,094 INFO L354 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2021-12-15 10:47:36,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-12-15 10:47:36,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:36,097 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 21 treesize of output 23 [2021-12-15 10:47:36,100 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 8 treesize of output 7 [2021-12-15 10:47:36,305 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-15 10:47:36,305 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 85 treesize of output 47 [2021-12-15 10:47:36,310 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-15 10:47:36,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-15 10:47:36,331 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 [2021-12-15 10:47:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:36,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:36,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:36,395 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2021-12-15 10:47:36,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:36,398 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2021-12-15 10:47:36,446 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~l~0#1.base_40| Int) (v_arrayElimArr_15 (Array Int Int)) (v_arrayElimArr_14 (Array Int Int)) (v_ArrVal_698 (Array Int Int))) (or (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_40|))) (not (= (select v_arrayElimArr_15 0) |c_ULTIMATE.start_main_~l~0#1.offset|)) (<= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_40| v_ArrVal_698) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~l~0#1.base_40| v_arrayElimArr_14) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~l~0#1.base_40| v_arrayElimArr_15) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) 4)) |c_ULTIMATE.start_main_~max~0#1|) (not (= (select v_arrayElimArr_14 0) |c_ULTIMATE.start_main_~l~0#1.base|)))) is different from false [2021-12-15 10:47:36,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:36,590 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 58 [2021-12-15 10:47:36,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:36,598 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 55 treesize of output 43 [2021-12-15 10:47:36,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2021-12-15 10:47:36,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:36,606 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2021-12-15 10:47:36,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:36,613 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 28 treesize of output 20 [2021-12-15 10:47:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-12-15 10:47:36,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680442395] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:36,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:36,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2021-12-15 10:47:36,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131579820] [2021-12-15 10:47:36,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:36,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 10:47:36,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:36,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 10:47:36,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=4, NotChecked=44, Total=600 [2021-12-15 10:47:36,776 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:37,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:37,638 INFO L93 Difference]: Finished difference Result 168 states and 194 transitions. [2021-12-15 10:47:37,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 10:47:37,638 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 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 [2021-12-15 10:47:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:37,639 INFO L225 Difference]: With dead ends: 168 [2021-12-15 10:47:37,639 INFO L226 Difference]: Without dead ends: 166 [2021-12-15 10:47:37,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=220, Invalid=1418, Unknown=6, NotChecked=78, Total=1722 [2021-12-15 10:47:37,640 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 142 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:37,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 207 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 440 Invalid, 0 Unknown, 202 Unchecked, 0.2s Time] [2021-12-15 10:47:37,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-15 10:47:37,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 95. [2021-12-15 10:47:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 94 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-12-15 10:47:37,656 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 35 [2021-12-15 10:47:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:37,657 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-12-15 10:47:37,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:37,657 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-12-15 10:47:37,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 10:47:37,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:37,660 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:37,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:37,865 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,SelfDestructingSolverStorable15 [2021-12-15 10:47:37,865 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:37,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:37,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2065136743, now seen corresponding path program 2 times [2021-12-15 10:47:37,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:37,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055770808] [2021-12-15 10:47:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:37,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:38,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:38,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055770808] [2021-12-15 10:47:38,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055770808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:38,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749287080] [2021-12-15 10:47:38,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:47:38,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:38,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:38,168 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:47:38,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 10:47:38,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:47:38,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:47:38,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-15 10:47:38,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:38,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 10:47:38,299 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 [2021-12-15 10:47:38,340 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 [2021-12-15 10:47:38,345 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 [2021-12-15 10:47:38,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:38,349 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 18 treesize of output 20 [2021-12-15 10:47:38,361 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-15 10:47:38,362 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 21 treesize of output 29 [2021-12-15 10:47:38,532 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-15 10:47:38,536 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-15 10:47:38,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:38,541 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 37 treesize of output 35 [2021-12-15 10:47:38,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:38,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:38,549 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-15 10:47:38,549 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 41 treesize of output 40 [2021-12-15 10:47:38,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:38,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:38,560 INFO L354 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2021-12-15 10:47:38,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-12-15 10:47:38,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:38,564 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 18 treesize of output 20 [2021-12-15 10:47:38,964 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-15 10:47:38,964 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 80 treesize of output 50 [2021-12-15 10:47:38,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:38,970 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-15 10:47:38,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-15 10:47:39,053 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-15 10:47:39,053 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 37 treesize of output 25 [2021-12-15 10:47:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:39,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:39,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:39,295 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2021-12-15 10:47:39,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:39,300 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2021-12-15 10:47:39,325 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_21 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_45| Int) (v_ArrVal_794 (Array Int Int)) (v_arrayElimArr_20 (Array Int Int))) (let ((.cse0 (select v_ArrVal_794 4))) (or (<= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_45| v_ArrVal_794) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~l~0#1.base_45| v_arrayElimArr_20) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~l~0#1.base_45| v_arrayElimArr_21) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) 4)) .cse0) (not (= (select v_arrayElimArr_21 0) |c_ULTIMATE.start_main_~l~0#1.offset|)) (<= .cse0 |c_ULTIMATE.start_main_~max~0#1|) (not (= (select v_arrayElimArr_20 0) |c_ULTIMATE.start_main_~l~0#1.base|)) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_45|)))))) is different from false [2021-12-15 10:47:39,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:39,553 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 64 [2021-12-15 10:47:39,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:39,557 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 47 [2021-12-15 10:47:39,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2021-12-15 10:47:39,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:39,565 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2021-12-15 10:47:39,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:39,568 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2021-12-15 10:47:39,721 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~l~0#1.base_45| Int) (v_arrayElimCell_127 Int) (v_ArrVal_794 (Array Int Int)) (v_ArrVal_785 (Array Int Int))) (let ((.cse1 (select v_ArrVal_794 4)) (.cse0 (select v_ArrVal_785 4))) (or (<= .cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (not (= 0 (select |c_#valid| v_arrayElimCell_127))) (not (= 0 (select (store |c_#valid| v_arrayElimCell_127 1) |v_ULTIMATE.start_main_~l~0#1.base_45|))) (<= (select (select (store (store |c_#memory_int| v_arrayElimCell_127 v_ArrVal_785) |v_ULTIMATE.start_main_~l~0#1.base_45| v_ArrVal_794) |c_ULTIMATE.start_main_~l~0#1.base|) (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4)) .cse1) (<= .cse1 .cse0)))) is different from false [2021-12-15 10:47:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-12-15 10:47:39,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749287080] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:39,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:39,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 38 [2021-12-15 10:47:39,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160749020] [2021-12-15 10:47:39,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:39,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-15 10:47:39,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:39,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-15 10:47:39,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1132, Unknown=5, NotChecked=138, Total=1406 [2021-12-15 10:47:39,814 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:43,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:43,387 INFO L93 Difference]: Finished difference Result 318 states and 368 transitions. [2021-12-15 10:47:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-15 10:47:43,388 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 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 [2021-12-15 10:47:43,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:43,394 INFO L225 Difference]: With dead ends: 318 [2021-12-15 10:47:43,395 INFO L226 Difference]: Without dead ends: 316 [2021-12-15 10:47:43,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 49 SyntacticMatches, 27 SemanticMatches, 80 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2018 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=955, Invalid=5363, Unknown=10, NotChecked=314, Total=6642 [2021-12-15 10:47:43,396 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 376 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:43,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 557 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 980 Invalid, 0 Unknown, 442 Unchecked, 0.6s Time] [2021-12-15 10:47:43,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-15 10:47:43,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 109. [2021-12-15 10:47:43,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.2710280373831775) internal successors, (136), 108 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2021-12-15 10:47:43,416 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 136 transitions. Word has length 35 [2021-12-15 10:47:43,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:43,417 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 136 transitions. [2021-12-15 10:47:43,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 136 transitions. [2021-12-15 10:47:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 10:47:43,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:43,419 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:43,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:43,636 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,SelfDestructingSolverStorable16 [2021-12-15 10:47:43,636 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:43,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:43,637 INFO L85 PathProgramCache]: Analyzing trace with hash -678933349, now seen corresponding path program 2 times [2021-12-15 10:47:43,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:43,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121323161] [2021-12-15 10:47:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:43,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:43,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:43,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121323161] [2021-12-15 10:47:43,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121323161] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:43,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5064563] [2021-12-15 10:47:43,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:47:43,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:43,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:43,994 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) [2021-12-15 10:47:43,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 10:47:44,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:47:44,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:47:44,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-15 10:47:44,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:44,124 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 [2021-12-15 10:47:44,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 10:47:44,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:44,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:44,267 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 26 treesize of output 29 [2021-12-15 10:47:44,270 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 [2021-12-15 10:47:44,282 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-15 10:47:44,283 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 21 treesize of output 29 [2021-12-15 10:47:44,292 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 [2021-12-15 10:47:44,454 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-15 10:47:44,459 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-15 10:47:44,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:44,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:44,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 43 [2021-12-15 10:47:44,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:44,472 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 16 treesize of output 18 [2021-12-15 10:47:44,503 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-12-15 10:47:44,503 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 24 treesize of output 26 [2021-12-15 10:47:44,507 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 44 treesize of output 38 [2021-12-15 10:47:45,057 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-15 10:47:45,057 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 115 treesize of output 65 [2021-12-15 10:47:45,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:45,064 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-15 10:47:45,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-15 10:47:45,179 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-15 10:47:45,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 24 [2021-12-15 10:47:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:45,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:45,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:45,499 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2021-12-15 10:47:45,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:45,503 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2021-12-15 10:47:45,530 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_889 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_50| Int) (v_arrayElimArr_26 (Array Int Int)) (v_arrayElimArr_27 (Array Int Int))) (let ((.cse0 (select v_ArrVal_889 4))) (or (<= .cse0 |c_ULTIMATE.start_main_~max~0#1|) (<= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_50| v_ArrVal_889) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~l~0#1.base_50| v_arrayElimArr_26) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~l~0#1.base_50| v_arrayElimArr_27) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) 4)) .cse0) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_50|))) (not (= (select v_arrayElimArr_26 0) |c_ULTIMATE.start_main_~l~0#1.base|)) (not (= (select v_arrayElimArr_27 0) |c_ULTIMATE.start_main_~l~0#1.offset|))))) is different from false [2021-12-15 10:47:45,594 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_889 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_50| Int) (v_arrayElimArr_26 (Array Int Int)) (v_arrayElimArr_27 (Array Int Int))) (let ((.cse0 (select v_ArrVal_889 4))) (or (<= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_50| v_ArrVal_889) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~l~0#1.base_50| v_arrayElimArr_26) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~l~0#1.base_50| v_arrayElimArr_27) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) 4)) .cse0) (<= .cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_50|))) (not (= (select v_arrayElimArr_26 0) |c_ULTIMATE.start_main_~l~0#1.base|)) (not (= (select v_arrayElimArr_27 0) |c_ULTIMATE.start_main_~l~0#1.offset|))))) is different from false [2021-12-15 10:47:45,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:45,677 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 70 [2021-12-15 10:47:45,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:45,681 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 67 treesize of output 55 [2021-12-15 10:47:45,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2021-12-15 10:47:45,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:45,689 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2021-12-15 10:47:45,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:45,693 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 38 treesize of output 30 [2021-12-15 10:47:46,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:46,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:46,118 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 23 treesize of output 21 [2021-12-15 10:47:46,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 10:47:46,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 10:47:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2021-12-15 10:47:46,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5064563] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:46,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:46,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 43 [2021-12-15 10:47:46,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530342203] [2021-12-15 10:47:46,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:46,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-15 10:47:46,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:46,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-15 10:47:46,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1523, Unknown=4, NotChecked=158, Total=1806 [2021-12-15 10:47:46,130 INFO L87 Difference]: Start difference. First operand 109 states and 136 transitions. Second operand has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 43 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:55,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:55,803 INFO L93 Difference]: Finished difference Result 338 states and 380 transitions. [2021-12-15 10:47:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-15 10:47:55,804 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 43 states have internal predecessors, (99), 0 states have call successors, (0), 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 [2021-12-15 10:47:55,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:55,805 INFO L225 Difference]: With dead ends: 338 [2021-12-15 10:47:55,805 INFO L226 Difference]: Without dead ends: 336 [2021-12-15 10:47:55,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 60 SyntacticMatches, 9 SemanticMatches, 129 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 4230 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2248, Invalid=14252, Unknown=20, NotChecked=510, Total=17030 [2021-12-15 10:47:55,808 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 492 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 803 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:55,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 925 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1717 Invalid, 0 Unknown, 803 Unchecked, 1.0s Time] [2021-12-15 10:47:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-15 10:47:55,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 57. [2021-12-15 10:47:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-12-15 10:47:55,814 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 35 [2021-12-15 10:47:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:55,814 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-12-15 10:47:55,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 43 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:55,815 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-12-15 10:47:55,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 10:47:55,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:55,815 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:55,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 10:47:56,015 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,SelfDestructingSolverStorable17 [2021-12-15 10:47:56,016 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:47:56,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:47:56,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1475182485, now seen corresponding path program 5 times [2021-12-15 10:47:56,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:47:56,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809354860] [2021-12-15 10:47:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:47:56,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:47:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:47:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:56,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:47:56,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809354860] [2021-12-15 10:47:56,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809354860] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:47:56,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662133058] [2021-12-15 10:47:56,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:47:56,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:47:56,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:47:56,184 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) [2021-12-15 10:47:56,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 10:47:56,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 10:47:56,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:47:56,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-15 10:47:56,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:47:56,307 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 [2021-12-15 10:47:56,311 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 [2021-12-15 10:47:56,313 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 [2021-12-15 10:47:56,367 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-15 10:47:56,370 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-15 10:47:56,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:56,374 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 16 treesize of output 18 [2021-12-15 10:47:56,387 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-15 10:47:56,388 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 21 treesize of output 29 [2021-12-15 10:47:56,391 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 18 treesize of output 20 [2021-12-15 10:47:56,482 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-15 10:47:56,486 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-15 10:47:56,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:56,495 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-12-15 10:47:56,495 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 52 [2021-12-15 10:47:56,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:56,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:56,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-12-15 10:47:56,511 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-15 10:47:56,512 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 28 treesize of output 30 [2021-12-15 10:47:56,901 INFO L354 Elim1Store]: treesize reduction 105, result has 6.3 percent of original size [2021-12-15 10:47:56,901 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 140 treesize of output 74 [2021-12-15 10:47:56,908 INFO L354 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2021-12-15 10:47:56,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 25 [2021-12-15 10:47:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:47:56,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:47:56,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:56,979 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2021-12-15 10:47:56,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:56,982 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 56 [2021-12-15 10:47:57,080 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_35 (Array Int Int)) (v_arrayElimArr_34 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_57| Int) (|v_ULTIMATE.start_main_~l~0#1.offset_57| Int)) (or (not (= (select v_arrayElimArr_34 |v_ULTIMATE.start_main_~l~0#1.offset_57|) |c_ULTIMATE.start_main_~l~0#1.base|)) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~l~0#1.base_57| v_arrayElimArr_35)) (.cse3 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~l~0#1.base_57| v_arrayElimArr_34))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|)) (.cse2 (select (select .cse0 |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|))) (and (= (select (select .cse0 .cse1) .cse2) 0) (= (select (select .cse3 .cse1) .cse2) 0)))) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_57|))) (not (= (select v_arrayElimArr_35 |v_ULTIMATE.start_main_~l~0#1.offset_57|) |c_ULTIMATE.start_main_~l~0#1.offset|)))) is different from false [2021-12-15 10:47:57,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:57,422 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 111 [2021-12-15 10:47:57,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:57,426 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 102 [2021-12-15 10:47:57,777 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_35 (Array Int Int)) (v_arrayElimArr_34 (Array Int Int)) (v_arrayElimArr_37 (Array Int Int)) (v_arrayElimArr_36 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_57| Int) (|v_ULTIMATE.start_main_~l~0#1.offset_57| Int)) (let ((.cse1 (select v_arrayElimArr_35 |v_ULTIMATE.start_main_~l~0#1.offset_57|)) (.cse0 (select v_arrayElimArr_34 |v_ULTIMATE.start_main_~l~0#1.offset_57|))) (or (not (= (select v_arrayElimArr_36 0) |c_ULTIMATE.start_main_~l~0#1.base|)) (not (= (select v_arrayElimArr_37 0) |c_ULTIMATE.start_main_~l~0#1.offset|)) (not (= 0 (select (store |c_#valid| .cse0 1) |v_ULTIMATE.start_main_~l~0#1.base_57|))) (not (= .cse1 0)) (let ((.cse2 (store (store |c_#memory_$Pointer$.offset| .cse0 v_arrayElimArr_37) |v_ULTIMATE.start_main_~l~0#1.base_57| v_arrayElimArr_35)) (.cse5 (store (store |c_#memory_$Pointer$.base| .cse0 v_arrayElimArr_36) |v_ULTIMATE.start_main_~l~0#1.base_57| v_arrayElimArr_34))) (let ((.cse3 (select (select .cse5 .cse0) .cse1)) (.cse4 (select (select .cse2 .cse0) .cse1))) (and (= (select (select .cse2 .cse3) .cse4) 0) (= (select (select .cse5 .cse3) .cse4) 0)))) (not (= 0 (select |c_#valid| .cse0)))))) is different from false [2021-12-15 10:47:59,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:59,487 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 142 [2021-12-15 10:47:59,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:59,492 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 106 [2021-12-15 10:47:59,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:59,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:59,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:59,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:59,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:59,498 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 44 [2021-12-15 10:47:59,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:47:59,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:59,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:47:59,503 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 97 [2021-12-15 10:47:59,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2021-12-15 10:47:59,509 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 84 [2021-12-15 10:47:59,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:47:59,514 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 84 treesize of output 78 [2021-12-15 10:47:59,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-15 10:47:59,524 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-15 10:47:59,525 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 22 treesize of output 18 [2021-12-15 10:47:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 19 not checked. [2021-12-15 10:47:59,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662133058] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:47:59,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:47:59,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 21 [2021-12-15 10:47:59,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622532664] [2021-12-15 10:47:59,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:47:59,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-15 10:47:59,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:47:59,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-15 10:47:59,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=300, Unknown=2, NotChecked=70, Total=420 [2021-12-15 10:47:59,564 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:59,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:47:59,878 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2021-12-15 10:47:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 10:47:59,878 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-15 10:47:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:47:59,878 INFO L225 Difference]: With dead ends: 93 [2021-12-15 10:47:59,878 INFO L226 Difference]: Without dead ends: 67 [2021-12-15 10:47:59,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=479, Unknown=2, NotChecked=90, Total=650 [2021-12-15 10:47:59,879 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:47:59,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 304 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2021-12-15 10:47:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-15 10:47:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-15 10:47:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 66 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-12-15 10:47:59,885 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 38 [2021-12-15 10:47:59,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:47:59,885 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-12-15 10:47:59,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:47:59,885 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-12-15 10:47:59,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 10:47:59,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:47:59,885 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:47:59,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-15 10:48:00,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:00,102 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:48:00,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:48:00,102 INFO L85 PathProgramCache]: Analyzing trace with hash -901782222, now seen corresponding path program 6 times [2021-12-15 10:48:00,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:48:00,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46775023] [2021-12-15 10:48:00,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:48:00,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:48:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:48:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:48:00,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:48:00,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46775023] [2021-12-15 10:48:00,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46775023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:48:00,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98696114] [2021-12-15 10:48:00,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 10:48:00,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:48:00,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:48:00,490 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) [2021-12-15 10:48:00,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 10:48:00,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-15 10:48:00,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:48:00,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-15 10:48:00,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:48:00,718 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 [2021-12-15 10:48:00,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 10:48:00,789 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 [2021-12-15 10:48:00,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:00,803 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 20 treesize of output 22 [2021-12-15 10:48:00,816 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-15 10:48:00,816 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 [2021-12-15 10:48:00,819 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 [2021-12-15 10:48:00,901 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-15 10:48:00,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:00,906 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 51 treesize of output 45 [2021-12-15 10:48:00,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:00,910 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 32 treesize of output 34 [2021-12-15 10:48:00,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:00,914 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 35 treesize of output 37 [2021-12-15 10:48:00,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:00,929 INFO L354 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2021-12-15 10:48:00,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 34 treesize of output 49 [2021-12-15 10:48:00,934 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 8 treesize of output 7 [2021-12-15 10:48:01,061 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-12-15 10:48:01,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:01,073 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-12-15 10:48:01,073 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 70 [2021-12-15 10:48:01,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:01,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-12-15 10:48:01,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:01,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:01,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:01,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 59 [2021-12-15 10:48:01,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:01,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:01,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:01,100 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-12-15 10:48:01,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-12-15 10:48:01,105 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 8 treesize of output 7 [2021-12-15 10:48:05,976 INFO L354 Elim1Store]: treesize reduction 77, result has 19.8 percent of original size [2021-12-15 10:48:05,976 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 171 treesize of output 93 [2021-12-15 10:48:05,987 INFO L354 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2021-12-15 10:48:05,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 35 [2021-12-15 10:48:06,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2021-12-15 10:48:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:48:06,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:48:06,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:48:06,351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 72 [2021-12-15 10:48:06,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:48:06,355 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 63 [2021-12-15 10:48:06,376 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_43 (Array Int Int)) (v_ArrVal_1111 (Array Int Int)) (|v_ULTIMATE.start_main_~l~0#1.base_64| Int) (v_arrayElimArr_42 (Array Int Int))) (let ((.cse0 (select v_ArrVal_1111 4))) (or (not (= (select v_arrayElimArr_42 0) |c_ULTIMATE.start_main_~l~0#1.base|)) (not (= (select v_arrayElimArr_43 0) |c_ULTIMATE.start_main_~l~0#1.offset|)) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_64|))) (<= .cse0 (let ((.cse4 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~l~0#1.base_64| v_arrayElimArr_43)) (.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~l~0#1.base_64| v_arrayElimArr_42))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|)) (.cse3 (select (select .cse4 |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|))) (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_64| v_ArrVal_1111) (select (select .cse1 .cse2) .cse3)) (+ (select (select .cse4 .cse2) .cse3) 4))))) (< |c_ULTIMATE.start_main_~max~0#1| .cse0)))) is different from false [2021-12-15 10:48:06,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:48:06,468 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 123 [2021-12-15 10:48:06,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:48:06,476 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 114 [2021-12-15 10:48:06,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:48:06,882 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 159 [2021-12-15 10:48:06,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 10:48:06,887 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 123 [2021-12-15 10:48:06,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:48:06,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:48:06,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:48:06,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:06,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:06,894 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 61 [2021-12-15 10:48:06,897 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 90 [2021-12-15 10:48:06,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 64 [2021-12-15 10:48:06,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:48:06,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:48:06,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 10:48:06,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 10:48:06,904 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-12-15 10:48:07,178 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1107 (Array Int Int)) (v_ArrVal_1111 (Array Int Int)) (v_ArrVal_1098 (Array Int Int)) (v_arrayElimCell_216 Int) (|v_ULTIMATE.start_main_~l~0#1.base_64| Int) (v_arrayElimCell_215 Int)) (let ((.cse0 (store |c_#valid| v_arrayElimCell_215 1)) (.cse1 (select v_ArrVal_1111 4))) (or (not (= 0 (select |c_#valid| v_arrayElimCell_215))) (not (= 0 (select (store .cse0 v_arrayElimCell_216 1) |v_ULTIMATE.start_main_~l~0#1.base_64|))) (<= .cse1 (select (select (store (store (store |c_#memory_int| v_arrayElimCell_215 v_ArrVal_1098) v_arrayElimCell_216 v_ArrVal_1107) |v_ULTIMATE.start_main_~l~0#1.base_64| v_ArrVal_1111) |c_ULTIMATE.start_main_~l~0#1.base|) (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4))) (not (= 0 (select .cse0 v_arrayElimCell_216))) (< (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4)) .cse1)))) is different from false [2021-12-15 10:48:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 21 not checked. [2021-12-15 10:48:07,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98696114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:48:07,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:48:07,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 42 [2021-12-15 10:48:07,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458909260] [2021-12-15 10:48:07,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:48:07,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-15 10:48:07,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:48:07,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-15 10:48:07,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1448, Unknown=8, NotChecked=154, Total=1722 [2021-12-15 10:48:07,323 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 42 states, 42 states have (on average 2.8333333333333335) internal successors, (119), 42 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)