./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mbpr4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/mbpr4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d3770c63a87ff983494c9353997301d9eb30588c650f83b67bcf55f325443055 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 22:46:06,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:46:06,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:46:06,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:46:06,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:46:06,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:46:06,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:46:06,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:46:06,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:46:06,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:46:06,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:46:06,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:46:06,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:46:06,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:46:06,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:46:06,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:46:06,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:46:06,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:46:06,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:46:06,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:46:06,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:46:06,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:46:06,727 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:46:06,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:46:06,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:46:06,734 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:46:06,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:46:06,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:46:06,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:46:06,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:46:06,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:46:06,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:46:06,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:46:06,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:46:06,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:46:06,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:46:06,742 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:46:06,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:46:06,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:46:06,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:46:06,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:46:06,746 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:46:06,772 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:46:06,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:46:06,773 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:46:06,773 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:46:06,774 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:46:06,774 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:46:06,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:46:06,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:46:06,774 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:46:06,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:46:06,775 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:46:06,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:46:06,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:46:06,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:46:06,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:46:06,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:46:06,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:46:06,777 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:46:06,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:46:06,777 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:46:06,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:46:06,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:46:06,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:46:06,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:46:06,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:46:06,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:46:06,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:46:06,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:46:06,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:46:06,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:46:06,780 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:46:06,780 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:46:06,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:46:06,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:46:06,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3770c63a87ff983494c9353997301d9eb30588c650f83b67bcf55f325443055 [2021-12-16 22:46:07,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:46:07,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:46:07,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:46:07,052 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:46:07,053 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:46:07,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mbpr4.c [2021-12-16 22:46:07,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cfbb0acf/05b00d7ee19143868a19a5c42b9c9750/FLAG1b284d84c [2021-12-16 22:46:07,512 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:46:07,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr4.c [2021-12-16 22:46:07,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cfbb0acf/05b00d7ee19143868a19a5c42b9c9750/FLAG1b284d84c [2021-12-16 22:46:07,908 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cfbb0acf/05b00d7ee19143868a19a5c42b9c9750 [2021-12-16 22:46:07,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:46:07,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:46:07,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:46:07,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:46:07,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:46:07,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:46:07" (1/1) ... [2021-12-16 22:46:07,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@569e3fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:07, skipping insertion in model container [2021-12-16 22:46:07,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:46:07" (1/1) ... [2021-12-16 22:46:07,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:46:07,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:46:08,118 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/array-tiling/mbpr4.c[396,409] [2021-12-16 22:46:08,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:46:08,158 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:46:08,171 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/array-tiling/mbpr4.c[396,409] [2021-12-16 22:46:08,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:46:08,215 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:46:08,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:08 WrapperNode [2021-12-16 22:46:08,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:46:08,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:46:08,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:46:08,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:46:08,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:08" (1/1) ... [2021-12-16 22:46:08,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:08" (1/1) ... [2021-12-16 22:46:08,268 INFO L137 Inliner]: procedures = 15, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 137 [2021-12-16 22:46:08,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:46:08,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:46:08,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:46:08,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:46:08,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:08" (1/1) ... [2021-12-16 22:46:08,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:08" (1/1) ... [2021-12-16 22:46:08,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:08" (1/1) ... [2021-12-16 22:46:08,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:08" (1/1) ... [2021-12-16 22:46:08,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:08" (1/1) ... [2021-12-16 22:46:08,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:08" (1/1) ... [2021-12-16 22:46:08,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:08" (1/1) ... [2021-12-16 22:46:08,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:46:08,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:46:08,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:46:08,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:46:08,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:08" (1/1) ... [2021-12-16 22:46:08,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:46:08,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:08,340 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 22:46:08,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 22:46:08,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:46:08,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:46:08,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 22:46:08,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:46:08,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:46:08,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:46:08,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:46:08,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 22:46:08,452 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:46:08,454 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:46:08,647 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:46:08,652 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:46:08,652 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-16 22:46:08,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:46:08 BoogieIcfgContainer [2021-12-16 22:46:08,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:46:08,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:46:08,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:46:08,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:46:08,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:46:07" (1/3) ... [2021-12-16 22:46:08,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc7c57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:46:08, skipping insertion in model container [2021-12-16 22:46:08,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:46:08" (2/3) ... [2021-12-16 22:46:08,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc7c57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:46:08, skipping insertion in model container [2021-12-16 22:46:08,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:46:08" (3/3) ... [2021-12-16 22:46:08,660 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr4.c [2021-12-16 22:46:08,676 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:46:08,676 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:46:08,726 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:46:08,734 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 22:46:08,734 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:46:08,750 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 38 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) [2021-12-16 22:46:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 22:46:08,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:08,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:08,757 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:08,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:08,761 INFO L85 PathProgramCache]: Analyzing trace with hash -912130766, now seen corresponding path program 1 times [2021-12-16 22:46:08,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:08,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567779563] [2021-12-16 22:46:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:08,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:08,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:08,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567779563] [2021-12-16 22:46:08,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567779563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:46:08,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:46:08,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 22:46:08,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102439592] [2021-12-16 22:46:08,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:46:08,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 22:46:08,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:08,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 22:46:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 22:46:08,954 INFO L87 Difference]: Start difference. First operand has 39 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 38 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) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:09,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:09,016 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2021-12-16 22:46:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 22:46:09,018 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-16 22:46:09,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:09,024 INFO L225 Difference]: With dead ends: 73 [2021-12-16 22:46:09,024 INFO L226 Difference]: Without dead ends: 34 [2021-12-16 22:46:09,027 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 [2021-12-16 22:46:09,030 INFO L933 BasicCegarLoop]: 50 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, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:09,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:46:09,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-16 22:46:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-16 22:46:09,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-12-16 22:46:09,056 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 19 [2021-12-16 22:46:09,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:09,057 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-12-16 22:46:09,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-12-16 22:46:09,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 22:46:09,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:09,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:09,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 22:46:09,058 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:09,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash 560162573, now seen corresponding path program 1 times [2021-12-16 22:46:09,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:09,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972827257] [2021-12-16 22:46:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:09,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:09,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:09,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972827257] [2021-12-16 22:46:09,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972827257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:46:09,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:46:09,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 22:46:09,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308993103] [2021-12-16 22:46:09,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:46:09,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 22:46:09,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:09,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 22:46:09,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 22:46:09,126 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:09,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:09,159 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-12-16 22:46:09,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 22:46:09,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-16 22:46:09,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:09,161 INFO L225 Difference]: With dead ends: 43 [2021-12-16 22:46:09,161 INFO L226 Difference]: Without dead ends: 41 [2021-12-16 22:46:09,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:46:09,163 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:09,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 119 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:46:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-16 22:46:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-12-16 22:46:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 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) [2021-12-16 22:46:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-12-16 22:46:09,169 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 19 [2021-12-16 22:46:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:09,169 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-12-16 22:46:09,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-12-16 22:46:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 22:46:09,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:09,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:09,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 22:46:09,171 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:09,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:09,172 INFO L85 PathProgramCache]: Analyzing trace with hash 560222155, now seen corresponding path program 1 times [2021-12-16 22:46:09,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:09,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519322846] [2021-12-16 22:46:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:09,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:09,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:09,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519322846] [2021-12-16 22:46:09,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519322846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:46:09,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:46:09,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 22:46:09,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387323530] [2021-12-16 22:46:09,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:46:09,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 22:46:09,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:09,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 22:46:09,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:46:09,352 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:09,469 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2021-12-16 22:46:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 22:46:09,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-16 22:46:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:09,471 INFO L225 Difference]: With dead ends: 78 [2021-12-16 22:46:09,471 INFO L226 Difference]: Without dead ends: 52 [2021-12-16 22:46:09,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:46:09,473 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:09,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 24 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:46:09,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-16 22:46:09,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2021-12-16 22:46:09,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-12-16 22:46:09,481 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 19 [2021-12-16 22:46:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:09,481 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-12-16 22:46:09,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:09,482 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-12-16 22:46:09,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-16 22:46:09,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:09,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:09,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 22:46:09,484 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:09,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:09,485 INFO L85 PathProgramCache]: Analyzing trace with hash -846989385, now seen corresponding path program 1 times [2021-12-16 22:46:09,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:09,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315740020] [2021-12-16 22:46:09,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:09,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:46:09,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:09,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315740020] [2021-12-16 22:46:09,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315740020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:46:09,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:46:09,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:46:09,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237000996] [2021-12-16 22:46:09,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:46:09,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:46:09,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:09,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:46:09,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:46:09,633 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 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) [2021-12-16 22:46:09,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:09,656 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-12-16 22:46:09,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:46:09,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-16 22:46:09,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:09,658 INFO L225 Difference]: With dead ends: 55 [2021-12-16 22:46:09,658 INFO L226 Difference]: Without dead ends: 40 [2021-12-16 22:46:09,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:46:09,659 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:09,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 35 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:46:09,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-16 22:46:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-16 22:46:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-12-16 22:46:09,668 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 35 [2021-12-16 22:46:09,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:09,668 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-12-16 22:46:09,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 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) [2021-12-16 22:46:09,669 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-12-16 22:46:09,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-16 22:46:09,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:09,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:09,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 22:46:09,670 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:09,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:09,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1240016395, now seen corresponding path program 1 times [2021-12-16 22:46:09,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:09,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139252550] [2021-12-16 22:46:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:09,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:10,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:10,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139252550] [2021-12-16 22:46:10,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139252550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:10,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777709559] [2021-12-16 22:46:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:10,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:10,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:10,199 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:10,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 22:46:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:10,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-16 22:46:10,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:10,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:46:10,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2021-12-16 22:46:10,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,571 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 29 treesize of output 28 [2021-12-16 22:46:10,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,613 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 33 treesize of output 29 [2021-12-16 22:46:10,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,688 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 29 treesize of output 28 [2021-12-16 22:46:10,710 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 0 case distinctions, treesize of input 46 treesize of output 35 [2021-12-16 22:46:10,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 29 [2021-12-16 22:46:10,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,773 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 29 treesize of output 28 [2021-12-16 22:46:10,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:10,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:46:10,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-12-16 22:46:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:10,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:11,390 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 27 [2021-12-16 22:46:11,393 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 55 treesize of output 51 [2021-12-16 22:46:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:46:11,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777709559] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:11,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:11,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 23 [2021-12-16 22:46:11,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273804787] [2021-12-16 22:46:11,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:11,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 22:46:11,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:11,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 22:46:11,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-12-16 22:46:11,524 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 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) [2021-12-16 22:46:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:12,241 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2021-12-16 22:46:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 22:46:12,241 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 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 [2021-12-16 22:46:12,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:12,242 INFO L225 Difference]: With dead ends: 111 [2021-12-16 22:46:12,242 INFO L226 Difference]: Without dead ends: 78 [2021-12-16 22:46:12,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 49 SyntacticMatches, 19 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-12-16 22:46:12,244 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 237 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:12,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 121 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:46:12,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-16 22:46:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 42. [2021-12-16 22:46:12,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:46:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-12-16 22:46:12,250 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 35 [2021-12-16 22:46:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:12,251 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-12-16 22:46:12,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 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) [2021-12-16 22:46:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-12-16 22:46:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 22:46:12,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:12,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:12,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:12,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:12,453 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:12,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:12,453 INFO L85 PathProgramCache]: Analyzing trace with hash 505076392, now seen corresponding path program 1 times [2021-12-16 22:46:12,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:12,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350900837] [2021-12-16 22:46:12,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:12,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:46:12,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:12,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350900837] [2021-12-16 22:46:12,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350900837] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:12,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49210695] [2021-12-16 22:46:12,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:12,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:12,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:12,694 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:12,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 22:46:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:12,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-16 22:46:12,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:12,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:46:12,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:12,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:12,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:12,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:12,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:12,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:12,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:46:12,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2021-12-16 22:46:13,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:13,023 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 29 treesize of output 28 [2021-12-16 22:46:13,046 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 0 case distinctions, treesize of input 51 treesize of output 40 [2021-12-16 22:46:13,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:13,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:13,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:13,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:13,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 35 treesize of output 32 [2021-12-16 22:46:13,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:13,100 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 29 treesize of output 28 [2021-12-16 22:46:13,134 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 0 case distinctions, treesize of input 57 treesize of output 44 [2021-12-16 22:46:13,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:13,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:13,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:13,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:13,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:13,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:13,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:13,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-12-16 22:46:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 22:46:13,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:13,812 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 117 treesize of output 105 [2021-12-16 22:46:13,818 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-16 22:46:13,818 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 316 treesize of output 300 [2021-12-16 22:46:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:46:14,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49210695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:14,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:14,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 12] total 26 [2021-12-16 22:46:14,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782671161] [2021-12-16 22:46:14,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:14,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 22:46:14,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:14,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 22:46:14,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-12-16 22:46:14,048 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 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) [2021-12-16 22:46:15,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:15,208 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2021-12-16 22:46:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 22:46:15,209 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-16 22:46:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:15,210 INFO L225 Difference]: With dead ends: 138 [2021-12-16 22:46:15,210 INFO L226 Difference]: Without dead ends: 109 [2021-12-16 22:46:15,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=615, Invalid=2037, Unknown=0, NotChecked=0, Total=2652 [2021-12-16 22:46:15,213 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 434 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:15,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 120 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 467 Invalid, 0 Unknown, 4 Unchecked, 0.4s Time] [2021-12-16 22:46:15,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-16 22:46:15,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2021-12-16 22:46:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 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) [2021-12-16 22:46:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-12-16 22:46:15,221 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 41 [2021-12-16 22:46:15,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:15,221 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-12-16 22:46:15,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 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) [2021-12-16 22:46:15,221 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-12-16 22:46:15,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 22:46:15,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:15,222 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:15,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:15,435 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,SelfDestructingSolverStorable5 [2021-12-16 22:46:15,436 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1880770843, now seen corresponding path program 2 times [2021-12-16 22:46:15,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:15,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117228492] [2021-12-16 22:46:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:15,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:46:15,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:15,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117228492] [2021-12-16 22:46:15,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117228492] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:15,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752815402] [2021-12-16 22:46:15,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:46:15,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:15,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:15,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:15,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 22:46:15,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:46:15,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:15,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 22:46:15,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:15,902 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 16 treesize of output 12 [2021-12-16 22:46:15,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:15,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:15,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:15,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:15,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:15,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:15,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2021-12-16 22:46:15,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:15,995 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 29 treesize of output 28 [2021-12-16 22:46:16,014 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 0 case distinctions, treesize of input 56 treesize of output 45 [2021-12-16 22:46:16,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:16,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:16,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:16,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:16,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:16,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 35 treesize of output 32 [2021-12-16 22:46:16,194 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 [2021-12-16 22:46:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:46:16,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:16,416 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 [2021-12-16 22:46:16,419 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 34 treesize of output 30 [2021-12-16 22:46:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:46:16,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752815402] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:16,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:16,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-16 22:46:16,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285521245] [2021-12-16 22:46:16,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:16,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 22:46:16,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:16,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 22:46:16,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-12-16 22:46:16,493 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 22 states, 22 states have (on average 5.909090909090909) internal successors, (130), 22 states have internal predecessors, (130), 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) [2021-12-16 22:46:16,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:16,828 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2021-12-16 22:46:16,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 22:46:16,829 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.909090909090909) internal successors, (130), 22 states have internal predecessors, (130), 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 47 [2021-12-16 22:46:16,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:16,829 INFO L225 Difference]: With dead ends: 128 [2021-12-16 22:46:16,829 INFO L226 Difference]: Without dead ends: 85 [2021-12-16 22:46:16,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 81 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2021-12-16 22:46:16,831 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 257 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:16,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 118 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:46:16,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-16 22:46:16,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2021-12-16 22:46:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 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) [2021-12-16 22:46:16,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-12-16 22:46:16,837 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 47 [2021-12-16 22:46:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:16,838 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-12-16 22:46:16,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.909090909090909) internal successors, (130), 22 states have internal predecessors, (130), 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) [2021-12-16 22:46:16,838 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-12-16 22:46:16,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:46:16,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:16,840 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:16,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:17,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:17,055 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:17,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:17,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1960980289, now seen corresponding path program 3 times [2021-12-16 22:46:17,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:17,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764864493] [2021-12-16 22:46:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:17,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:46:17,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:17,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764864493] [2021-12-16 22:46:17,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764864493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:17,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501733485] [2021-12-16 22:46:17,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:46:17,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:17,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:17,348 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:17,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 22:46:17,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-16 22:46:17,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:17,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 22:46:17,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:46:18,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:46:18,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501733485] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:46:18,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:46:18,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2021-12-16 22:46:18,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282783516] [2021-12-16 22:46:18,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:46:18,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-16 22:46:18,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:46:18,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-16 22:46:18,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2021-12-16 22:46:18,361 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 31 states, 31 states have (on average 5.32258064516129) internal successors, (165), 31 states have internal predecessors, (165), 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) [2021-12-16 22:46:18,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:46:18,702 INFO L93 Difference]: Finished difference Result 179 states and 198 transitions. [2021-12-16 22:46:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 22:46:18,703 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.32258064516129) internal successors, (165), 31 states have internal predecessors, (165), 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 59 [2021-12-16 22:46:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:46:18,704 INFO L225 Difference]: With dead ends: 179 [2021-12-16 22:46:18,704 INFO L226 Difference]: Without dead ends: 88 [2021-12-16 22:46:18,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=333, Invalid=927, Unknown=0, NotChecked=0, Total=1260 [2021-12-16 22:46:18,705 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 417 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:46:18,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 169 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:46:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-16 22:46:18,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2021-12-16 22:46:18,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 75 states have internal predecessors, (82), 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) [2021-12-16 22:46:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-12-16 22:46:18,712 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 59 [2021-12-16 22:46:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:46:18,712 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-12-16 22:46:18,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.32258064516129) internal successors, (165), 31 states have internal predecessors, (165), 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) [2021-12-16 22:46:18,712 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-12-16 22:46:18,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-16 22:46:18,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:46:18,713 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:46:18,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 22:46:18,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:18,927 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:46:18,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:46:18,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1835840619, now seen corresponding path program 4 times [2021-12-16 22:46:18,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:46:18,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567891506] [2021-12-16 22:46:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:46:18,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:46:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:46:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 22:46:19,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:46:19,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567891506] [2021-12-16 22:46:19,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567891506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:46:19,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507555278] [2021-12-16 22:46:19,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:46:19,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:46:19,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:46:19,228 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:46:19,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 22:46:19,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:46:19,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:46:19,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-16 22:46:19,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:46:19,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:46:19,469 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 0 case distinctions, treesize of input 80 treesize of output 69 [2021-12-16 22:46:19,533 INFO L354 Elim1Store]: treesize reduction 620, result has 9.0 percent of original size [2021-12-16 22:46:19,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 127 treesize of output 124 [2021-12-16 22:46:19,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:19,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:19,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:19,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:19,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:19,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:46:19,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2021-12-16 22:46:19,607 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:46:19,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:46:19,620 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 0 case distinctions, treesize of input 77 treesize of output 66 [2021-12-16 22:46:19,692 INFO L354 Elim1Store]: treesize reduction 542, result has 9.2 percent of original size [2021-12-16 22:46:19,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 124 treesize of output 118 [2021-12-16 22:46:19,730 INFO L354 Elim1Store]: treesize reduction 99, result has 1.0 percent of original size [2021-12-16 22:46:19,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 49 [2021-12-16 22:46:19,928 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 [2021-12-16 22:46:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 22:46:19,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:46:22,122 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_105| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_105| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_629 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_105| 16) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4)) v_ArrVal_629) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) is different from false [2021-12-16 22:46:23,334 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 108 treesize of output 100 [2021-12-16 22:46:23,384 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-12-16 22:46:23,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10518504 treesize of output 9756648 [2021-12-16 22:46:39,410 WARN L227 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 1040 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-16 22:47:46,802 WARN L227 SmtUtils]: Spent 28.93s on a formula simplification. DAG size of input: 565 DAG size of output: 565 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-16 22:48:15,820 WARN L227 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 488 DAG size of output: 488 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-16 22:48:28,121 WARN L227 SmtUtils]: Spent 9.29s on a formula simplification. DAG size of input: 488 DAG size of output: 488 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15