./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-simple/sll2n_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-simple/sll2n_append_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:58:05,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:58:05,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:58:05,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:58:05,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:58:05,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:58:05,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:58:05,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:58:05,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:58:05,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:58:05,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:58:05,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:58:05,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:58:05,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:58:05,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:58:05,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:58:05,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:58:05,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:58:05,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:58:05,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:58:05,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:58:05,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:58:05,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:58:05,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:58:05,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:58:05,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:58:05,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:58:05,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:58:05,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:58:05,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:58:05,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:58:05,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:58:05,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:58:05,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:58:05,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:58:05,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:58:05,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:58:05,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:58:05,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:58:05,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:58:05,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:58:05,716 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:58:05,740 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:58:05,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:58:05,741 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:58:05,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:58:05,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:58:05,742 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:58:05,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:58:05,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:58:05,743 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:58:05,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:58:05,744 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:58:05,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:58:05,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:58:05,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:58:05,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:58:05,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:58:05,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:58:05,745 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:58:05,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:58:05,745 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:58:05,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:58:05,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:58:05,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:58:05,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:58:05,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:58:05,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:58:05,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:58:05,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:58:05,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:58:05,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:58:05,746 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:58:05,747 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:58:05,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:58:05,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:58:05,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab [2021-12-15 23:58:05,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:58:05,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:58:05,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:58:05,933 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:58:05,934 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:58:05,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2021-12-15 23:58:05,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beace12af/832aa7b8b3d24f19bff4047a2b3bb0c1/FLAGb51c7c04d [2021-12-15 23:58:06,422 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:58:06,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2021-12-15 23:58:06,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beace12af/832aa7b8b3d24f19bff4047a2b3bb0c1/FLAGb51c7c04d [2021-12-15 23:58:06,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beace12af/832aa7b8b3d24f19bff4047a2b3bb0c1 [2021-12-15 23:58:06,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:58:06,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:58:06,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:58:06,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:58:06,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:58:06,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:58:06" (1/1) ... [2021-12-15 23:58:06,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db32e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:06, skipping insertion in model container [2021-12-15 23:58:06,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:58:06" (1/1) ... [2021-12-15 23:58:06,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:58:06,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:58:06,752 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/list-simple/sll2n_append_unequal.i[24323,24336] [2021-12-15 23:58:06,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:58:06,764 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:58:06,791 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/list-simple/sll2n_append_unequal.i[24323,24336] [2021-12-15 23:58:06,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:58:06,822 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:58:06,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:06 WrapperNode [2021-12-15 23:58:06,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:58:06,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:58:06,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:58:06,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:58:06,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:06" (1/1) ... [2021-12-15 23:58:06,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:06" (1/1) ... [2021-12-15 23:58:06,864 INFO L137 Inliner]: procedures = 127, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2021-12-15 23:58:06,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:58:06,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:58:06,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:58:06,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:58:06,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:06" (1/1) ... [2021-12-15 23:58:06,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:06" (1/1) ... [2021-12-15 23:58:06,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:06" (1/1) ... [2021-12-15 23:58:06,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:06" (1/1) ... [2021-12-15 23:58:06,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:06" (1/1) ... [2021-12-15 23:58:06,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:06" (1/1) ... [2021-12-15 23:58:06,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:06" (1/1) ... [2021-12-15 23:58:06,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:58:06,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:58:06,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:58:06,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:58:06,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:06" (1/1) ... [2021-12-15 23:58:06,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:58:06,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:58:06,933 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 23:58:06,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 23:58:06,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 23:58:06,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 23:58:06,961 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-15 23:58:06,961 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-15 23:58:06,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 23:58:06,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:58:06,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 23:58:06,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 23:58:06,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 23:58:06,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 23:58:06,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-15 23:58:06,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:58:06,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:58:06,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:58:07,035 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:58:07,037 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:58:07,248 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:58:07,263 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:58:07,263 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-15 23:58:07,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:58:07 BoogieIcfgContainer [2021-12-15 23:58:07,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:58:07,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:58:07,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:58:07,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:58:07,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:58:06" (1/3) ... [2021-12-15 23:58:07,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151e3d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:58:07, skipping insertion in model container [2021-12-15 23:58:07,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:06" (2/3) ... [2021-12-15 23:58:07,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151e3d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:58:07, skipping insertion in model container [2021-12-15 23:58:07,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:58:07" (3/3) ... [2021-12-15 23:58:07,271 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2021-12-15 23:58:07,275 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:58:07,275 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:58:07,309 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:58:07,320 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 23:58:07,320 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:58:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 30 states have (on average 1.5) internal successors, (45), 31 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-15 23:58:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 23:58:07,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:58:07,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:58:07,340 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:58:07,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:58:07,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1473722618, now seen corresponding path program 1 times [2021-12-15 23:58:07,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:58:07,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224965094] [2021-12-15 23:58:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:58:07,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:58:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:07,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-15 23:58:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:58:07,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:58:07,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224965094] [2021-12-15 23:58:07,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224965094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:58:07,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:58:07,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:58:07,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481924429] [2021-12-15 23:58:07,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:58:07,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:58:07,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:58:07,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:58:07,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:58:07,564 INFO L87 Difference]: Start difference. First operand has 35 states, 30 states have (on average 1.5) internal successors, (45), 31 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-15 23:58:07,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:58:07,620 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2021-12-15 23:58:07,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:58:07,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-15 23:58:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:58:07,627 INFO L225 Difference]: With dead ends: 64 [2021-12-15 23:58:07,627 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 23:58:07,630 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 [2021-12-15 23:58:07,632 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:58:07,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:58:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 23:58:07,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-15 23:58:07,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-15 23:58:07,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-12-15 23:58:07,664 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2021-12-15 23:58:07,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:58:07,664 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-12-15 23:58:07,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-15 23:58:07,665 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-12-15 23:58:07,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 23:58:07,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:58:07,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:58:07,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:58:07,667 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:58:07,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:58:07,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1996757262, now seen corresponding path program 1 times [2021-12-15 23:58:07,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:58:07,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323309682] [2021-12-15 23:58:07,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:58:07,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:58:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:07,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-15 23:58:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:58:07,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:58:07,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323309682] [2021-12-15 23:58:07,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323309682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:58:07,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:58:07,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:58:07,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801451794] [2021-12-15 23:58:07,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:58:07,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:58:07,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:58:07,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:58:07,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:58:07,745 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-15 23:58:07,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:58:07,783 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-12-15 23:58:07,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:58:07,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-15 23:58:07,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:58:07,785 INFO L225 Difference]: With dead ends: 56 [2021-12-15 23:58:07,785 INFO L226 Difference]: Without dead ends: 33 [2021-12-15 23:58:07,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:58:07,786 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:58:07,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:58:07,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-15 23:58:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-12-15 23:58:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-15 23:58:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-12-15 23:58:07,792 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2021-12-15 23:58:07,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:58:07,792 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-12-15 23:58:07,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-15 23:58:07,792 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-12-15 23:58:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 23:58:07,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:58:07,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:58:07,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:58:07,794 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:58:07,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:58:07,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1017886446, now seen corresponding path program 1 times [2021-12-15 23:58:07,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:58:07,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846798808] [2021-12-15 23:58:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:58:07,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:58:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:07,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 23:58:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:07,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-15 23:58:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 23:58:07,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:58:07,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846798808] [2021-12-15 23:58:07,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846798808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:58:07,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233383107] [2021-12-15 23:58:07,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:58:07,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:58:07,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:58:07,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:58:07,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 23:58:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:08,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 23:58:08,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:58:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:58:08,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:58:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 23:58:08,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233383107] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 23:58:08,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 23:58:08,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2021-12-15 23:58:08,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631879598] [2021-12-15 23:58:08,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 23:58:08,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 23:58:08,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:58:08,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 23:58:08,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:58:08,206 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-15 23:58:08,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:58:08,241 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2021-12-15 23:58:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 23:58:08,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2021-12-15 23:58:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:58:08,243 INFO L225 Difference]: With dead ends: 57 [2021-12-15 23:58:08,243 INFO L226 Difference]: Without dead ends: 34 [2021-12-15 23:58:08,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:58:08,244 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:58:08,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:58:08,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-15 23:58:08,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-15 23:58:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 23:58:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-12-15 23:58:08,249 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 26 [2021-12-15 23:58:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:58:08,249 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-12-15 23:58:08,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-15 23:58:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-12-15 23:58:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 23:58:08,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:58:08,250 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:58:08,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 23:58:08,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:58:08,465 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:58:08,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:58:08,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1383615218, now seen corresponding path program 2 times [2021-12-15 23:58:08,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:58:08,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446528922] [2021-12-15 23:58:08,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:58:08,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:58:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:08,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 23:58:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:08,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 23:58:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:08,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 23:58:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 23:58:08,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:58:08,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446528922] [2021-12-15 23:58:08,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446528922] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:58:08,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785192231] [2021-12-15 23:58:08,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 23:58:08,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:58:08,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:58:08,699 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:58:08,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 23:58:08,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 23:58:08,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 23:58:08,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-15 23:58:08,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:58:09,077 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 9 [2021-12-15 23:58:09,125 WARN L860 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (exists ((v_ArrVal_313 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_313))))) is different from true [2021-12-15 23:58:09,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:09,153 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 24 treesize of output 24 [2021-12-15 23:58:09,181 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 25 treesize of output 13 [2021-12-15 23:58:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2021-12-15 23:58:09,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:58:09,274 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_316 (Array Int Int)) (|v_node_create_~temp~0#1.base_13| Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_13| v_ArrVal_316) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (or (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_13|) (<= (+ .cse0 1) 0) (<= 1 .cse0)))) is different from false [2021-12-15 23:58:09,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785192231] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:58:09,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:58:09,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-12-15 23:58:09,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187855533] [2021-12-15 23:58:09,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 23:58:09,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 23:58:09,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:58:09,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 23:58:09,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=439, Unknown=2, NotChecked=86, Total=600 [2021-12-15 23:58:09,278 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 17 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-15 23:58:09,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:58:09,530 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2021-12-15 23:58:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 23:58:09,531 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 17 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2021-12-15 23:58:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:58:09,532 INFO L225 Difference]: With dead ends: 44 [2021-12-15 23:58:09,532 INFO L226 Difference]: Without dead ends: 34 [2021-12-15 23:58:09,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=698, Unknown=2, NotChecked=110, Total=930 [2021-12-15 23:58:09,534 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 23:58:09,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 232 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 158 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2021-12-15 23:58:09,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-15 23:58:09,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-15 23:58:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 23:58:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-12-15 23:58:09,539 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 35 [2021-12-15 23:58:09,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:58:09,539 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-12-15 23:58:09,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 17 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-15 23:58:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-12-15 23:58:09,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 23:58:09,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:58:09,541 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:58:09,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 23:58:09,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-15 23:58:09,756 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:58:09,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:58:09,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1699814766, now seen corresponding path program 1 times [2021-12-15 23:58:09,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:58:09,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714802182] [2021-12-15 23:58:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:58:09,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:58:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:10,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 23:58:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:10,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 23:58:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:10,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 23:58:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 23:58:10,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:58:10,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714802182] [2021-12-15 23:58:10,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714802182] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:58:10,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956948745] [2021-12-15 23:58:10,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:58:10,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:58:10,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:58:10,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:58:10,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 23:58:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:10,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-15 23:58:10,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:58:10,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 23:58:10,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 23:58:10,670 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-12-15 23:58:10,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 20 [2021-12-15 23:58:10,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-15 23:58:10,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:10,832 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-15 23:58:10,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 53 [2021-12-15 23:58:10,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:10,839 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 25 treesize of output 27 [2021-12-15 23:58:10,847 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-15 23:58:10,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-15 23:58:11,007 INFO L354 Elim1Store]: treesize reduction 102, result has 30.6 percent of original size [2021-12-15 23:58:11,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 73 [2021-12-15 23:58:11,019 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-15 23:58:11,020 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 49 treesize of output 44 [2021-12-15 23:58:11,043 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-12-15 23:58:11,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 20 [2021-12-15 23:58:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 23:58:11,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:58:24,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956948745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:58:24,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:58:24,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2021-12-15 23:58:24,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949279999] [2021-12-15 23:58:24,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 23:58:24,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-15 23:58:24,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:58:24,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-15 23:58:24,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1210, Unknown=9, NotChecked=0, Total=1332 [2021-12-15 23:58:24,704 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 32 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 26 states have internal predecessors, (52), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-15 23:58:25,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:58:25,398 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-12-15 23:58:25,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 23:58:25,399 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 26 states have internal predecessors, (52), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2021-12-15 23:58:25,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:58:25,401 INFO L225 Difference]: With dead ends: 48 [2021-12-15 23:58:25,401 INFO L226 Difference]: Without dead ends: 37 [2021-12-15 23:58:25,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=230, Invalid=2210, Unknown=10, NotChecked=0, Total=2450 [2021-12-15 23:58:25,402 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:58:25,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 339 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 323 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2021-12-15 23:58:25,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-15 23:58:25,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-12-15 23:58:25,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 23:58:25,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-15 23:58:25,406 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 38 [2021-12-15 23:58:25,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:58:25,406 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-15 23:58:25,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 26 states have internal predecessors, (52), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-15 23:58:25,406 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-15 23:58:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 23:58:25,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:58:25,410 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:58:25,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 23:58:25,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:58:25,628 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:58:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:58:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1006966459, now seen corresponding path program 1 times [2021-12-15 23:58:25,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:58:25,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791053828] [2021-12-15 23:58:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:58:25,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:58:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:26,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 23:58:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:26,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 23:58:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:26,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 23:58:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 23:58:26,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:58:26,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791053828] [2021-12-15 23:58:26,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791053828] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:58:26,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140596235] [2021-12-15 23:58:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:58:26,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:58:26,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:58:26,605 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:58:26,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 23:58:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:26,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-15 23:58:26,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:58:26,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 23:58:27,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 23:58:27,185 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-15 23:58:27,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-15 23:58:27,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 23:58:27,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:27,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-15 23:58:27,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 23:58:27,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 32 [2021-12-15 23:58:27,527 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 7 treesize of output 3 [2021-12-15 23:58:27,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-15 23:58:27,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 23:58:27,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:27,772 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-15 23:58:27,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 65 [2021-12-15 23:58:27,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:27,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-15 23:58:27,797 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-15 23:58:27,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-12-15 23:58:27,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:27,805 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 14 treesize of output 16 [2021-12-15 23:58:28,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 23:58:28,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:28,331 INFO L354 Elim1Store]: treesize reduction 152, result has 16.0 percent of original size [2021-12-15 23:58:28,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 170 treesize of output 86 [2021-12-15 23:58:28,344 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-12-15 23:58:28,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-12-15 23:58:28,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-12-15 23:58:28,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 23:58:28,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 27 [2021-12-15 23:58:28,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 23:58:28,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 23:58:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:58:28,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:58:28,554 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_643 Int) (v_ArrVal_640 (Array Int Int)) (v_ArrVal_644 Int)) (= (let ((.cse0 (+ |c_ULTIMATE.start_sll_append_~last~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_640) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse0 v_ArrVal_644)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse0 v_ArrVal_643)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-12-15 23:58:29,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140596235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:58:29,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:58:29,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-12-15 23:58:29,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990238209] [2021-12-15 23:58:29,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 23:58:29,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-15 23:58:29,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:58:29,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-15 23:58:29,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2680, Unknown=8, NotChecked=104, Total=2970 [2021-12-15 23:58:29,124 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 49 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 41 states have internal predecessors, (70), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-15 23:58:30,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:58:30,715 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-12-15 23:58:30,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 23:58:30,715 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 41 states have internal predecessors, (70), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2021-12-15 23:58:30,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:58:30,716 INFO L225 Difference]: With dead ends: 60 [2021-12-15 23:58:30,716 INFO L226 Difference]: Without dead ends: 58 [2021-12-15 23:58:30,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=390, Invalid=4717, Unknown=9, NotChecked=140, Total=5256 [2021-12-15 23:58:30,718 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 126 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:58:30,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 425 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 729 Invalid, 0 Unknown, 32 Unchecked, 0.4s Time] [2021-12-15 23:58:30,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-15 23:58:30,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2021-12-15 23:58:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 23:58:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-15 23:58:30,723 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 42 [2021-12-15 23:58:30,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:58:30,723 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-15 23:58:30,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 41 states have internal predecessors, (70), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-15 23:58:30,724 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-15 23:58:30,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 23:58:30,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:58:30,725 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:58:30,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 23:58:30,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:58:30,935 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:58:30,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:58:30,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1151243655, now seen corresponding path program 1 times [2021-12-15 23:58:30,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:58:30,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400159278] [2021-12-15 23:58:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:58:30,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:58:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:30,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 23:58:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:31,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 23:58:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:31,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 23:58:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-15 23:58:31,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:58:31,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400159278] [2021-12-15 23:58:31,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400159278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:58:31,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:58:31,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 23:58:31,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332847151] [2021-12-15 23:58:31,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:58:31,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 23:58:31,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:58:31,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 23:58:31,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:58:31,009 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-15 23:58:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:58:31,052 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-12-15 23:58:31,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 23:58:31,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2021-12-15 23:58:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:58:31,055 INFO L225 Difference]: With dead ends: 54 [2021-12-15 23:58:31,055 INFO L226 Difference]: Without dead ends: 49 [2021-12-15 23:58:31,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 23:58:31,056 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:58:31,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 110 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:58:31,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-15 23:58:31,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-12-15 23:58:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 23:58:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-15 23:58:31,070 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 43 [2021-12-15 23:58:31,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:58:31,071 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-15 23:58:31,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-15 23:58:31,071 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-15 23:58:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 23:58:31,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:58:31,073 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:58:31,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 23:58:31,073 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:58:31,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:58:31,074 INFO L85 PathProgramCache]: Analyzing trace with hash 223363488, now seen corresponding path program 2 times [2021-12-15 23:58:31,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:58:31,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763468860] [2021-12-15 23:58:31,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:58:31,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:58:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:31,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 23:58:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:31,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 23:58:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:31,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 23:58:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 23:58:32,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:58:32,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763468860] [2021-12-15 23:58:32,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763468860] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:58:32,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768605660] [2021-12-15 23:58:32,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 23:58:32,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:58:32,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:58:32,169 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:58:32,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 23:58:32,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 23:58:32,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 23:58:32,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 111 conjunts are in the unsatisfiable core [2021-12-15 23:58:32,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:58:32,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 23:58:32,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 23:58:32,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 23:58:32,659 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-15 23:58:32,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-15 23:58:32,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 23:58:32,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 23:58:32,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-15 23:58:32,757 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 27 treesize of output 26 [2021-12-15 23:58:32,981 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-15 23:58:32,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 44 [2021-12-15 23:58:32,991 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-15 23:58:32,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-12-15 23:58:32,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 23:58:33,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:33,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:33,166 INFO L354 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2021-12-15 23:58:33,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 107 treesize of output 110 [2021-12-15 23:58:33,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:33,184 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-12-15 23:58:33,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 106 [2021-12-15 23:58:33,197 INFO L354 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2021-12-15 23:58:33,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-12-15 23:58:33,434 INFO L354 Elim1Store]: treesize reduction 72, result has 4.0 percent of original size [2021-12-15 23:58:33,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 74 [2021-12-15 23:58:33,448 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-12-15 23:58:33,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 32 [2021-12-15 23:58:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 23:58:33,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:58:33,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768605660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:58:33,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:58:33,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20] total 43 [2021-12-15 23:58:33,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901733769] [2021-12-15 23:58:33,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 23:58:33,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-15 23:58:33,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:58:33,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-15 23:58:33,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2035, Unknown=7, NotChecked=0, Total=2162 [2021-12-15 23:58:33,806 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 43 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 36 states have internal predecessors, (71), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-15 23:58:35,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:58:35,797 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2021-12-15 23:58:35,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-15 23:58:35,797 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 36 states have internal predecessors, (71), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 44 [2021-12-15 23:58:35,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:58:35,800 INFO L225 Difference]: With dead ends: 91 [2021-12-15 23:58:35,800 INFO L226 Difference]: Without dead ends: 76 [2021-12-15 23:58:35,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=335, Invalid=4769, Unknown=8, NotChecked=0, Total=5112 [2021-12-15 23:58:35,802 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:58:35,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 503 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 657 Invalid, 0 Unknown, 124 Unchecked, 0.4s Time] [2021-12-15 23:58:35,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-15 23:58:35,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2021-12-15 23:58:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 states have internal predecessors, (62), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-15 23:58:35,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-12-15 23:58:35,814 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 44 [2021-12-15 23:58:35,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:58:35,814 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-12-15 23:58:35,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 36 states have internal predecessors, (71), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-15 23:58:35,814 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-12-15 23:58:35,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 23:58:35,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:58:35,815 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-15 23:58:35,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 23:58:36,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:58:36,030 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:58:36,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:58:36,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1809434049, now seen corresponding path program 1 times [2021-12-15 23:58:36,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:58:36,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987312343] [2021-12-15 23:58:36,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:58:36,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:58:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:36,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 23:58:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:36,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 23:58:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:36,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 23:58:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 23:58:36,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:58:36,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987312343] [2021-12-15 23:58:36,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987312343] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:58:36,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473646265] [2021-12-15 23:58:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:58:36,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:58:36,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:58:36,892 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:58:36,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 23:58:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:37,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 162 conjunts are in the unsatisfiable core [2021-12-15 23:58:37,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:58:37,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 23:58:37,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-15 23:58:37,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 23:58:37,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:37,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-15 23:58:37,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 23:58:37,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 23:58:37,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:37,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-15 23:58:37,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:37,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 23:58:37,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-15 23:58:37,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-15 23:58:37,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-15 23:58:37,782 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 23:58:37,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-15 23:58:37,787 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 7 treesize of output 3 [2021-12-15 23:58:37,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:37,817 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-15 23:58:37,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-15 23:58:37,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 23:58:37,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 23:58:37,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-15 23:58:37,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-15 23:58:37,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-15 23:58:38,312 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-12-15 23:58:38,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 66 [2021-12-15 23:58:38,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:38,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 12 [2021-12-15 23:58:38,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:38,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-12-15 23:58:38,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-15 23:58:38,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:38,522 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-12-15 23:58:38,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 190 treesize of output 158 [2021-12-15 23:58:38,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:38,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:38,540 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-12-15 23:58:38,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 165 treesize of output 162 [2021-12-15 23:58:38,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:38,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-15 23:58:38,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:38,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:38,558 INFO L354 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2021-12-15 23:58:38,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2021-12-15 23:58:39,209 INFO L354 Elim1Store]: treesize reduction 190, result has 15.9 percent of original size [2021-12-15 23:58:39,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 204 treesize of output 113 [2021-12-15 23:58:39,251 INFO L354 Elim1Store]: treesize reduction 116, result has 22.7 percent of original size [2021-12-15 23:58:39,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 186 [2021-12-15 23:58:39,271 INFO L354 Elim1Store]: treesize reduction 47, result has 48.9 percent of original size [2021-12-15 23:58:39,271 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 1 case distinctions, treesize of input 35 treesize of output 58 [2021-12-15 23:58:55,112 INFO L354 Elim1Store]: treesize reduction 121, result has 24.8 percent of original size [2021-12-15 23:58:55,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 326 treesize of output 159 [2021-12-15 23:58:55,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:58:55,127 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-12-15 23:58:55,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 38 [2021-12-15 23:58:55,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-12-15 23:58:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 23:58:55,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:59:14,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473646265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:59:14,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:59:14,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2021-12-15 23:59:14,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531828002] [2021-12-15 23:59:14,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 23:59:14,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-15 23:59:14,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:59:14,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-15 23:59:14,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3349, Unknown=9, NotChecked=0, Total=3540 [2021-12-15 23:59:14,150 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 50 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 42 states have internal predecessors, (76), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-15 23:59:16,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:59:16,860 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2021-12-15 23:59:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-15 23:59:16,861 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 42 states have internal predecessors, (76), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 45 [2021-12-15 23:59:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:59:16,861 INFO L225 Difference]: With dead ends: 78 [2021-12-15 23:59:16,861 INFO L226 Difference]: Without dead ends: 76 [2021-12-15 23:59:16,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=340, Invalid=5657, Unknown=9, NotChecked=0, Total=6006 [2021-12-15 23:59:16,863 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:59:16,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 468 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 721 Invalid, 0 Unknown, 176 Unchecked, 0.5s Time] [2021-12-15 23:59:16,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-15 23:59:16,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2021-12-15 23:59:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-15 23:59:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2021-12-15 23:59:16,870 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 45 [2021-12-15 23:59:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:59:16,870 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2021-12-15 23:59:16,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 42 states have internal predecessors, (76), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-15 23:59:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2021-12-15 23:59:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-15 23:59:16,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:59:16,871 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:59:16,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 23:59:17,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:59:17,083 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:59:17,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:59:17,084 INFO L85 PathProgramCache]: Analyzing trace with hash 257826173, now seen corresponding path program 1 times [2021-12-15 23:59:17,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:59:17,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756814586] [2021-12-15 23:59:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:59:17,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:59:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:59:17,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 23:59:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:59:17,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 23:59:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:59:17,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 23:59:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:59:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 23:59:17,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:59:17,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756814586] [2021-12-15 23:59:17,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756814586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:59:17,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425518657] [2021-12-15 23:59:17,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:59:17,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:59:17,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:59:17,743 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:59:17,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 23:59:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:59:18,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 137 conjunts are in the unsatisfiable core [2021-12-15 23:59:18,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:59:18,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 23:59:18,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-15 23:59:18,380 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-15 23:59:18,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-15 23:59:18,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 23:59:18,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 23:59:18,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 23:59:18,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 35 [2021-12-15 23:59:18,752 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-15 23:59:18,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 23:59:18,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:59:18,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 23:59:18,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:59:18,931 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-15 23:59:18,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 70 [2021-12-15 23:59:18,948 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-12-15 23:59:18,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-12-15 23:59:18,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:59:18,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:59:18,953 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 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-15 23:59:19,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 23:59:19,635 INFO L354 Elim1Store]: treesize reduction 145, result has 11.0 percent of original size [2021-12-15 23:59:19,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 221 treesize of output 105 [2021-12-15 23:59:19,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:59:19,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:59:19,656 INFO L354 Elim1Store]: treesize reduction 120, result has 11.1 percent of original size [2021-12-15 23:59:19,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 203 treesize of output 138 [2021-12-15 23:59:19,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:59:19,998 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-15 23:59:19,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 116 [2021-12-15 23:59:20,193 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-15 23:59:20,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 49 [2021-12-15 23:59:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:59:20,236 INFO L328 TraceCheckSpWp]: Computing backward predicates...