./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 10:55:22,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 10:55:22,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 10:55:23,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 10:55:23,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 10:55:23,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 10:55:23,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 10:55:23,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 10:55:23,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 10:55:23,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 10:55:23,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 10:55:23,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 10:55:23,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 10:55:23,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 10:55:23,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 10:55:23,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 10:55:23,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 10:55:23,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 10:55:23,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 10:55:23,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 10:55:23,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 10:55:23,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 10:55:23,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 10:55:23,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 10:55:23,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 10:55:23,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 10:55:23,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 10:55:23,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 10:55:23,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 10:55:23,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 10:55:23,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 10:55:23,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 10:55:23,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 10:55:23,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 10:55:23,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 10:55:23,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 10:55:23,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 10:55:23,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 10:55:23,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 10:55:23,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 10:55:23,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 10:55:23,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 10:55:23,065 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 10:55:23,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 10:55:23,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 10:55:23,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 10:55:23,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 10:55:23,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 10:55:23,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 10:55:23,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 10:55:23,068 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 10:55:23,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 10:55:23,069 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 10:55:23,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 10:55:23,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 10:55:23,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 10:55:23,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 10:55:23,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 10:55:23,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 10:55:23,071 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 10:55:23,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 10:55:23,071 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 10:55:23,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 10:55:23,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 10:55:23,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 10:55:23,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 10:55:23,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:55:23,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 10:55:23,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 10:55:23,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 10:55:23,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 10:55:23,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 10:55:23,074 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 10:55:23,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 10:55:23,074 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 10:55:23,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 10:55:23,075 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 10:55:23,075 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2023-02-14 10:55:23,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 10:55:23,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 10:55:23,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 10:55:23,356 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 10:55:23,357 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 10:55:23,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2023-02-14 10:55:24,401 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 10:55:24,584 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 10:55:24,585 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2023-02-14 10:55:24,605 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3fd575e6/c7e8e35a252e4ffeb08734b7d65cf922/FLAGe4e9e377e [2023-02-14 10:55:24,618 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3fd575e6/c7e8e35a252e4ffeb08734b7d65cf922 [2023-02-14 10:55:24,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 10:55:24,621 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 10:55:24,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 10:55:24,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 10:55:24,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 10:55:24,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:55:24" (1/1) ... [2023-02-14 10:55:24,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd7f90a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:24, skipping insertion in model container [2023-02-14 10:55:24,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:55:24" (1/1) ... [2023-02-14 10:55:24,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 10:55:24,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 10:55:24,941 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2023-02-14 10:55:24,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:55:24,975 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 10:55:24,999 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2023-02-14 10:55:25,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:55:25,031 INFO L208 MainTranslator]: Completed translation [2023-02-14 10:55:25,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:25 WrapperNode [2023-02-14 10:55:25,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 10:55:25,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 10:55:25,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 10:55:25,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 10:55:25,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:25" (1/1) ... [2023-02-14 10:55:25,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:25" (1/1) ... [2023-02-14 10:55:25,079 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 200 [2023-02-14 10:55:25,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 10:55:25,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 10:55:25,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 10:55:25,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 10:55:25,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:25" (1/1) ... [2023-02-14 10:55:25,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:25" (1/1) ... [2023-02-14 10:55:25,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:25" (1/1) ... [2023-02-14 10:55:25,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:25" (1/1) ... [2023-02-14 10:55:25,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:25" (1/1) ... [2023-02-14 10:55:25,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:25" (1/1) ... [2023-02-14 10:55:25,129 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:25" (1/1) ... [2023-02-14 10:55:25,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:25" (1/1) ... [2023-02-14 10:55:25,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 10:55:25,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 10:55:25,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 10:55:25,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 10:55:25,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:25" (1/1) ... [2023-02-14 10:55:25,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:55:25,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:55:25,165 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) [2023-02-14 10:55:25,191 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 [2023-02-14 10:55:25,206 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-02-14 10:55:25,207 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-02-14 10:55:25,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 10:55:25,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 10:55:25,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 10:55:25,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-14 10:55:25,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-14 10:55:25,209 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2023-02-14 10:55:25,209 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2023-02-14 10:55:25,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 10:55:25,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-14 10:55:25,209 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2023-02-14 10:55:25,209 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2023-02-14 10:55:25,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 10:55:25,210 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2023-02-14 10:55:25,210 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2023-02-14 10:55:25,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 10:55:25,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 10:55:25,346 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 10:55:25,357 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 10:55:25,629 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 10:55:25,635 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 10:55:25,635 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2023-02-14 10:55:25,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:55:25 BoogieIcfgContainer [2023-02-14 10:55:25,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 10:55:25,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 10:55:25,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 10:55:25,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 10:55:25,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:55:24" (1/3) ... [2023-02-14 10:55:25,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3cc147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:55:25, skipping insertion in model container [2023-02-14 10:55:25,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:25" (2/3) ... [2023-02-14 10:55:25,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3cc147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:55:25, skipping insertion in model container [2023-02-14 10:55:25,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:55:25" (3/3) ... [2023-02-14 10:55:25,656 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2023-02-14 10:55:25,670 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 10:55:25,670 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 10:55:25,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 10:55:25,710 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2378880b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 10:55:25,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 10:55:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 82 states have internal predecessors, (126), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-14 10:55:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 10:55:25,719 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:55:25,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:55:25,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:55:25,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:55:25,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1660370747, now seen corresponding path program 1 times [2023-02-14 10:55:25,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:55:25,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543109567] [2023-02-14 10:55:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:55:25,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:55:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:55:25,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:55:25,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543109567] [2023-02-14 10:55:25,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543109567] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:55:25,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:55:25,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 10:55:25,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405089915] [2023-02-14 10:55:25,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:55:25,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 10:55:25,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:55:25,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 10:55:25,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 10:55:25,937 INFO L87 Difference]: Start difference. First operand has 96 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 82 states have internal predecessors, (126), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:55:25,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:55:25,976 INFO L93 Difference]: Finished difference Result 188 states and 326 transitions. [2023-02-14 10:55:25,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 10:55:25,978 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-14 10:55:25,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:55:25,990 INFO L225 Difference]: With dead ends: 188 [2023-02-14 10:55:25,990 INFO L226 Difference]: Without dead ends: 88 [2023-02-14 10:55:25,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 10:55:25,997 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:55:25,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:55:26,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-14 10:55:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-02-14 10:55:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 75 states have internal predecessors, (83), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 10:55:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2023-02-14 10:55:26,029 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 16 [2023-02-14 10:55:26,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:55:26,029 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2023-02-14 10:55:26,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:55:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2023-02-14 10:55:26,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 10:55:26,031 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:55:26,031 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:55:26,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 10:55:26,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:55:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:55:26,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1299807145, now seen corresponding path program 1 times [2023-02-14 10:55:26,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:55:26,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488751855] [2023-02-14 10:55:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:55:26,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:55:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:27,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:55:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:27,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 10:55:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:27,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 10:55:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 10:55:27,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:55:27,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488751855] [2023-02-14 10:55:27,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488751855] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:55:27,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883782416] [2023-02-14 10:55:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:55:27,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:55:27,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:55:27,967 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) [2023-02-14 10:55:27,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 10:55:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:28,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-14 10:55:28,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:55:28,249 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 12 [2023-02-14 10:55:28,441 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 10:55:28,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 10:55:28,453 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2023-02-14 10:55:28,467 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:55:28,536 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-02-14 10:55:28,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 34 [2023-02-14 10:55:28,541 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 16 [2023-02-14 10:55:28,679 INFO L350 Elim1Store]: Elim1 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 19 [2023-02-14 10:55:28,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2023-02-14 10:55:28,840 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_328 (Array Int Int)) (v_ArrVal_327 (Array Int Int)) (v_ArrVal_329 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (<= |chain_node_~node~0#1.base| |chain_node_alloc_node_~ptr~0#1.base|) (= (store (store (store |c_old(#memory_$Pointer$.base)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_327) |chain_node_~node~0#1.base| v_ArrVal_328) |c_chain_node_#in~ppnode#1.base| v_ArrVal_329) |c_#memory_$Pointer$.base|) (< |chain_node_alloc_node_~ptr~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-14 10:55:28,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:55:28,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:55:28,896 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-02-14 10:55:28,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2023-02-14 10:55:28,901 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2023-02-14 10:55:28,951 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 8 [2023-02-14 10:55:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-02-14 10:55:28,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:55:29,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883782416] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:55:29,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:55:29,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2023-02-14 10:55:29,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354849793] [2023-02-14 10:55:29,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:55:29,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 10:55:29,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:55:29,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 10:55:29,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=479, Unknown=11, NotChecked=44, Total=600 [2023-02-14 10:55:29,108 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 24 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 10:55:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:55:30,385 INFO L93 Difference]: Finished difference Result 132 states and 163 transitions. [2023-02-14 10:55:30,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 10:55:30,385 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2023-02-14 10:55:30,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:55:30,388 INFO L225 Difference]: With dead ends: 132 [2023-02-14 10:55:30,388 INFO L226 Difference]: Without dead ends: 129 [2023-02-14 10:55:30,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=973, Unknown=11, NotChecked=64, Total=1190 [2023-02-14 10:55:30,389 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 219 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 10:55:30,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 549 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1217 Invalid, 0 Unknown, 158 Unchecked, 0.9s Time] [2023-02-14 10:55:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-14 10:55:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 100. [2023-02-14 10:55:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 86 states have internal predecessors, (97), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 10:55:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2023-02-14 10:55:30,413 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 40 [2023-02-14 10:55:30,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:55:30,413 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2023-02-14 10:55:30,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 10:55:30,414 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2023-02-14 10:55:30,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 10:55:30,415 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:55:30,415 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:55:30,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 10:55:30,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:55:30,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:55:30,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:55:30,622 INFO L85 PathProgramCache]: Analyzing trace with hash -727961485, now seen corresponding path program 1 times [2023-02-14 10:55:30,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:55:30,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780127285] [2023-02-14 10:55:30,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:55:30,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:55:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:31,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:55:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:31,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 10:55:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:31,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 10:55:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 10:55:31,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:55:31,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780127285] [2023-02-14 10:55:31,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780127285] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:55:31,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761421493] [2023-02-14 10:55:31,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:55:31,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:55:31,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:55:31,989 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) [2023-02-14 10:55:32,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 10:55:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:32,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-14 10:55:32,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:55:32,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 10:55:32,256 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 10:55:32,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 10:55:32,262 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2023-02-14 10:55:32,267 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:55:32,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 19 [2023-02-14 10:55:32,287 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2023-02-14 10:55:32,432 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-14 10:55:32,432 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 19 [2023-02-14 10:55:32,479 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 10:55:32,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 8 [2023-02-14 10:55:32,589 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_645 (Array Int Int)) (v_ArrVal_644 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_alloc_node_~ptr~0#1.base| Int) (v_ArrVal_643 (Array Int Int))) (and (<= (+ 1 |chain_node_alloc_node_~ptr~0#1.base|) |c_#StackHeapBarrier|) (<= |chain_node_~node~0#1.base| |chain_node_alloc_node_~ptr~0#1.base|) (= (store (store (store |c_old(#memory_$Pointer$.base)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_643) |chain_node_~node~0#1.base| v_ArrVal_644) |c_chain_node_#in~ppnode#1.base| v_ArrVal_645) |c_#memory_$Pointer$.base|))) is different from true [2023-02-14 10:55:32,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:55:32,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:55:32,665 INFO L321 Elim1Store]: treesize reduction 43, result has 47.6 percent of original size [2023-02-14 10:55:32,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 57 [2023-02-14 10:55:32,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-02-14 10:55:32,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-02-14 10:55:32,816 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 8 [2023-02-14 10:55:32,932 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_649 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_650 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_649) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_650) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|) (not (= |chain_node_~node~0#1.base| 0)))) is different from true [2023-02-14 10:55:32,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:55:33,009 INFO L321 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2023-02-14 10:55:33,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 101 [2023-02-14 10:55:33,017 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2023-02-14 10:55:33,034 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:55:33,049 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:55:33,138 INFO L321 Elim1Store]: treesize reduction 73, result has 19.8 percent of original size [2023-02-14 10:55:33,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 64 [2023-02-14 10:55:33,145 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 21 [2023-02-14 10:55:33,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2023-02-14 10:55:33,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:55:33,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 42 [2023-02-14 10:55:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2023-02-14 10:55:33,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:55:33,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761421493] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:55:33,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:55:33,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 29 [2023-02-14 10:55:33,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664313068] [2023-02-14 10:55:33,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:55:33,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 10:55:33,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:55:33,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 10:55:33,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=671, Unknown=5, NotChecked=106, Total=870 [2023-02-14 10:55:33,521 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand has 29 states, 23 states have (on average 2.260869565217391) internal successors, (52), 26 states have internal predecessors, (52), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 10:55:35,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:55:35,030 INFO L93 Difference]: Finished difference Result 132 states and 163 transitions. [2023-02-14 10:55:35,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 10:55:35,030 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 2.260869565217391) internal successors, (52), 26 states have internal predecessors, (52), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2023-02-14 10:55:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:55:35,032 INFO L225 Difference]: With dead ends: 132 [2023-02-14 10:55:35,033 INFO L226 Difference]: Without dead ends: 129 [2023-02-14 10:55:35,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=197, Invalid=1446, Unknown=5, NotChecked=158, Total=1806 [2023-02-14 10:55:35,034 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 149 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 54 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:55:35,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 787 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1520 Invalid, 5 Unknown, 256 Unchecked, 1.0s Time] [2023-02-14 10:55:35,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-14 10:55:35,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 100. [2023-02-14 10:55:35,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 86 states have internal predecessors, (96), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 10:55:35,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2023-02-14 10:55:35,051 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 42 [2023-02-14 10:55:35,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:55:35,051 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2023-02-14 10:55:35,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 2.260869565217391) internal successors, (52), 26 states have internal predecessors, (52), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 10:55:35,052 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2023-02-14 10:55:35,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 10:55:35,053 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:55:35,053 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:55:35,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 10:55:35,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-14 10:55:35,257 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:55:35,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:55:35,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1343975071, now seen corresponding path program 1 times [2023-02-14 10:55:35,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:55:35,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238546971] [2023-02-14 10:55:35,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:55:35,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:55:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:36,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:55:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:36,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 10:55:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:37,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 10:55:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 10:55:38,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:55:38,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238546971] [2023-02-14 10:55:38,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238546971] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:55:38,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633607916] [2023-02-14 10:55:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:55:38,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:55:38,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:55:38,522 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) [2023-02-14 10:55:38,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 10:55:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:38,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 139 conjunts are in the unsatisfiable core [2023-02-14 10:55:38,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:55:38,714 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 42 [2023-02-14 10:55:38,815 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 10:55:38,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 10:55:38,820 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2023-02-14 10:55:38,827 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:55:38,863 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-02-14 10:55:38,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 26 [2023-02-14 10:55:38,866 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 15 [2023-02-14 10:55:39,175 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-02-14 10:55:39,176 INFO L350 Elim1Store]: Elim1 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 74 treesize of output 70 [2023-02-14 10:55:39,198 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2023-02-14 10:55:39,260 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2023-02-14 10:55:39,316 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:55:39,489 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 10:55:39,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 10:55:39,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 10:55:39,509 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:55:39,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 15 [2023-02-14 10:55:39,533 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2023-02-14 10:55:39,568 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 22 [2023-02-14 10:55:39,579 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-14 10:55:39,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 29 [2023-02-14 10:55:39,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:55:39,768 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 29 [2023-02-14 10:55:39,772 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 13 [2023-02-14 10:55:39,776 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 23 [2023-02-14 10:55:39,937 INFO L321 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2023-02-14 10:55:39,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 45 [2023-02-14 10:55:39,953 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-14 10:55:39,953 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 27 [2023-02-14 10:55:40,041 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2023-02-14 10:55:40,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 23 [2023-02-14 10:55:40,046 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 10:55:40,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 3 [2023-02-14 10:55:40,050 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:55:40,265 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_982 (Array Int Int)) (|chain_node_~node~0#1.offset| Int) (v_ArrVal_983 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (let ((.cse0 (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_982 |chain_node_~node~0#1.offset| (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_982) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse0 |c_chain_node_#in~ppnode#1.base| (store (select .cse0 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))) |c_#memory_$Pointer$.base|) (= (let ((.cse1 (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_983 |chain_node_~node~0#1.offset| (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_983) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse1 |c_chain_node_#in~ppnode#1.base| (store (select .cse1 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.offset|))) |c_#memory_$Pointer$.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-02-14 10:55:40,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:55:40,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:55:40,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:55:40,342 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-02-14 10:55:40,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 57 [2023-02-14 10:55:40,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:55:40,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:55:40,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:55:40,387 INFO L321 Elim1Store]: treesize reduction 67, result has 25.6 percent of original size [2023-02-14 10:55:40,387 INFO L350 Elim1Store]: Elim1 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 5 case distinctions, treesize of input 82 treesize of output 88 [2023-02-14 10:55:40,397 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2023-02-14 10:55:40,403 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2023-02-14 10:55:40,414 INFO L321 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2023-02-14 10:55:40,414 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2023-02-14 10:55:40,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 48 [2023-02-14 10:55:40,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2023-02-14 10:55:40,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 43 [2023-02-14 10:55:40,734 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 35 [2023-02-14 10:55:41,215 INFO L321 Elim1Store]: treesize reduction 16, result has 82.8 percent of original size [2023-02-14 10:55:41,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 241 [2023-02-14 10:55:43,646 INFO L321 Elim1Store]: treesize reduction 80, result has 79.8 percent of original size [2023-02-14 10:55:43,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 190 treesize of output 406 [2023-02-14 10:55:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 2 times theorem prover too weak. 0 trivial. 4 not checked. [2023-02-14 10:55:47,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:55:48,271 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_chain_node_~node~0#1.offset_10| Int) (|v_chain_node_~node~0#1.base_10| Int) (v_ArrVal_1013 (Array Int Int)) (v_ArrVal_1012 (Array Int Int))) (or (not (= (select |c_#valid| |v_chain_node_~node~0#1.base_10|) 0)) (not (= (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_chain_node_~node~0#1.base_10| (store v_ArrVal_1012 |v_chain_node_~node~0#1.offset_10| (select (select (store |c_#memory_$Pointer$.base| |v_chain_node_~node~0#1.base_10| v_ArrVal_1012) |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset|))))) (store .cse1 |c_ULTIMATE.start_create_sll_~#list~0#1.base| (store (select .cse1 |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset| |v_chain_node_~node~0#1.base_10|))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|))) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |v_chain_node_~node~0#1.base_10| (store v_ArrVal_1013 |v_chain_node_~node~0#1.offset_10| (select (select (store |c_#memory_$Pointer$.offset| |v_chain_node_~node~0#1.base_10| v_ArrVal_1013) |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset|))))) (store .cse2 |c_ULTIMATE.start_create_sll_~#list~0#1.base| (store (select .cse2 |c_ULTIMATE.start_create_sll_~#list~0#1.base|) |c_ULTIMATE.start_create_sll_~#list~0#1.offset| |v_chain_node_~node~0#1.offset_10|))) |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) 0)) (not (< |v_chain_node_~node~0#1.base_10| |c_#StackHeapBarrier|)))) is different from false [2023-02-14 10:55:48,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633607916] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:55:48,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:55:48,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 40 [2023-02-14 10:55:48,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903092120] [2023-02-14 10:55:48,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:55:48,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-14 10:55:48,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:55:48,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-14 10:55:48,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1694, Unknown=7, NotChecked=166, Total=1980 [2023-02-14 10:55:48,278 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 40 states, 32 states have (on average 2.1875) internal successors, (70), 35 states have internal predecessors, (70), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 10:55:56,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:55:56,910 INFO L93 Difference]: Finished difference Result 201 states and 250 transitions. [2023-02-14 10:55:56,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 10:55:56,910 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 32 states have (on average 2.1875) internal successors, (70), 35 states have internal predecessors, (70), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2023-02-14 10:55:56,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:55:56,912 INFO L225 Difference]: With dead ends: 201 [2023-02-14 10:55:56,913 INFO L226 Difference]: Without dead ends: 198 [2023-02-14 10:55:56,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=365, Invalid=4042, Unknown=23, NotChecked=262, Total=4692 [2023-02-14 10:55:56,915 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 344 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 2577 mSolverCounterSat, 127 mSolverCounterUnsat, 28 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2577 IncrementalHoareTripleChecker+Invalid, 28 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:55:56,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1021 Invalid, 2926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2577 Invalid, 28 Unknown, 194 Unchecked, 3.3s Time] [2023-02-14 10:55:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-02-14 10:55:56,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 102. [2023-02-14 10:55:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.2375) internal successors, (99), 88 states have internal predecessors, (99), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 10:55:56,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2023-02-14 10:55:56,937 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 46 [2023-02-14 10:55:56,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:55:56,938 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2023-02-14 10:55:56,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 32 states have (on average 2.1875) internal successors, (70), 35 states have internal predecessors, (70), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 10:55:56,938 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2023-02-14 10:55:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 10:55:56,939 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:55:56,939 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:55:56,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 10:55:57,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:55:57,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:55:57,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:55:57,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2055778686, now seen corresponding path program 1 times [2023-02-14 10:55:57,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:55:57,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626019428] [2023-02-14 10:55:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:55:57,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:55:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:58,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:55:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:58,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 10:55:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:55:59,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 10:55:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:56:00,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 10:56:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:56:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 10:56:00,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:56:00,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626019428] [2023-02-14 10:56:00,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626019428] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:56:00,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840696231] [2023-02-14 10:56:00,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:56:00,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:56:00,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:56:00,233 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) [2023-02-14 10:56:00,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 10:56:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:56:00,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 132 conjunts are in the unsatisfiable core [2023-02-14 10:56:00,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:56:00,451 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 12 [2023-02-14 10:56:00,545 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:56:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:00,599 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 17 [2023-02-14 10:56:00,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:00,606 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 17 [2023-02-14 10:56:00,675 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2023-02-14 10:56:00,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 61 [2023-02-14 10:56:00,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2023-02-14 10:56:00,710 INFO L321 Elim1Store]: treesize reduction 17, result has 56.4 percent of original size [2023-02-14 10:56:00,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 71 [2023-02-14 10:56:00,741 INFO L321 Elim1Store]: treesize reduction 47, result has 33.8 percent of original size [2023-02-14 10:56:00,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 85 [2023-02-14 10:56:00,772 INFO L321 Elim1Store]: treesize reduction 46, result has 34.3 percent of original size [2023-02-14 10:56:00,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 84 [2023-02-14 10:56:00,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 10:56:00,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2023-02-14 10:56:00,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-02-14 10:56:00,860 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:56:00,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 28 [2023-02-14 10:56:00,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 28 [2023-02-14 10:56:00,912 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2023-02-14 10:56:00,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 91 [2023-02-14 10:56:00,988 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 10:56:00,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-02-14 10:56:01,041 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2023-02-14 10:56:01,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 125 [2023-02-14 10:56:01,075 INFO L321 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2023-02-14 10:56:01,075 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 85 [2023-02-14 10:56:01,124 INFO L321 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2023-02-14 10:56:01,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 88 treesize of output 103 [2023-02-14 10:56:01,148 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-02-14 10:56:01,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-02-14 10:56:03,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:03,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:03,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:03,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-02-14 10:56:03,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:03,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:03,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 46 [2023-02-14 10:56:03,508 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:56:03,513 INFO L350 Elim1Store]: Elim1 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 68 treesize of output 54 [2023-02-14 10:56:03,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:03,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:03,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2023-02-14 10:56:03,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:56:03,617 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 18 [2023-02-14 10:56:03,620 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:56:03,759 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1337 (Array Int Int)) (v_ArrVal_1335 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_1340 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1340) |c_chain_node_#in~ppnode#1.base| v_ArrVal_1337)) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (let ((.cse0 (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_1335 0 (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_1335) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse0 |c_chain_node_#in~ppnode#1.base| (store (select .cse0 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0)))) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-02-14 10:56:03,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:03,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:03,817 INFO L321 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2023-02-14 10:56:03,817 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 68 [2023-02-14 10:56:03,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:03,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:03,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:03,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:03,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:03,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:03,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2023-02-14 10:56:03,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2023-02-14 10:56:03,843 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:56:03,846 INFO L350 Elim1Store]: Elim1 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 49 treesize of output 37 [2023-02-14 10:56:03,856 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 10:56:03,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-14 10:56:04,684 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:56:04,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:56:04,689 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 83 treesize of output 47 [2023-02-14 10:56:04,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:04,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:04,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:04,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:04,705 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 10:56:04,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2023-02-14 10:56:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-02-14 10:56:04,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:56:05,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840696231] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:56:05,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:56:05,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2023-02-14 10:56:05,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670214452] [2023-02-14 10:56:05,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:56:05,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 10:56:05,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:56:05,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 10:56:05,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=728, Unknown=1, NotChecked=54, Total=870 [2023-02-14 10:56:05,118 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand has 28 states, 24 states have (on average 3.125) internal successors, (75), 26 states have internal predecessors, (75), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-14 10:56:08,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:56:08,533 INFO L93 Difference]: Finished difference Result 200 states and 243 transitions. [2023-02-14 10:56:08,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 10:56:08,534 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 3.125) internal successors, (75), 26 states have internal predecessors, (75), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 50 [2023-02-14 10:56:08,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:56:08,535 INFO L225 Difference]: With dead ends: 200 [2023-02-14 10:56:08,536 INFO L226 Difference]: Without dead ends: 197 [2023-02-14 10:56:08,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=217, Invalid=1676, Unknown=3, NotChecked=84, Total=1980 [2023-02-14 10:56:08,537 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 146 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:56:08,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 676 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1688 Invalid, 0 Unknown, 164 Unchecked, 2.1s Time] [2023-02-14 10:56:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-02-14 10:56:08,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2023-02-14 10:56:08,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 102 states have (on average 1.2254901960784315) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 10:56:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 154 transitions. [2023-02-14 10:56:08,571 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 154 transitions. Word has length 50 [2023-02-14 10:56:08,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:56:08,571 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 154 transitions. [2023-02-14 10:56:08,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 3.125) internal successors, (75), 26 states have internal predecessors, (75), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-14 10:56:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 154 transitions. [2023-02-14 10:56:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 10:56:08,573 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:56:08,573 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:56:08,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 10:56:08,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:56:08,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:56:08,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:56:08,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1969592115, now seen corresponding path program 1 times [2023-02-14 10:56:08,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:56:08,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935679182] [2023-02-14 10:56:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:56:08,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:56:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:56:10,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:56:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:56:10,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 10:56:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:56:12,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 10:56:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:56:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 10:56:13,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:56:13,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935679182] [2023-02-14 10:56:13,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935679182] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:56:13,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623420488] [2023-02-14 10:56:13,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:56:13,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:56:13,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:56:13,633 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) [2023-02-14 10:56:13,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 10:56:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:56:13,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 185 conjunts are in the unsatisfiable core [2023-02-14 10:56:13,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:56:13,865 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 10:56:13,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-02-14 10:56:14,020 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 10:56:14,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 10:56:14,044 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 10:56:14,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 10:56:14,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 10:56:14,063 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:56:14,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 10:56:14,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 10:56:14,143 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:56:14,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2023-02-14 10:56:14,146 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:56:14,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 9 [2023-02-14 10:56:14,155 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2023-02-14 10:56:14,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-02-14 10:56:14,366 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 15 [2023-02-14 10:56:14,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-14 10:56:14,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-02-14 10:56:14,488 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:56:14,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:14,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:14,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:14,833 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 36 [2023-02-14 10:56:14,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:14,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:14,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:14,850 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 31 [2023-02-14 10:56:14,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 23 [2023-02-14 10:56:14,865 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 15 [2023-02-14 10:56:14,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2023-02-14 10:56:14,892 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 15 [2023-02-14 10:56:15,117 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-02-14 10:56:15,117 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 58 [2023-02-14 10:56:15,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2023-02-14 10:56:15,275 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-02-14 10:56:15,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 33 [2023-02-14 10:56:15,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,288 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2023-02-14 10:56:15,291 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:56:15,497 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1697 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_1695 (Array Int Int)) (v_ArrVal_1694 (Array Int Int)) (v_ArrVal_1692 (Array Int Int))) (and (= |c_#memory_$Pointer$.offset| (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_1692 0 (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_1692) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_1694) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0))) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1697) |c_chain_node_#in~ppnode#1.base| v_ArrVal_1695) |c_#memory_$Pointer$.base|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-02-14 10:56:15,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,549 INFO L321 Elim1Store]: treesize reduction 55, result has 8.3 percent of original size [2023-02-14 10:56:15,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 92 [2023-02-14 10:56:15,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:15,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 58 [2023-02-14 10:56:15,572 INFO L350 Elim1Store]: Elim1 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 70 treesize of output 54 [2023-02-14 10:56:15,585 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2023-02-14 10:56:15,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-02-14 10:56:15,603 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 10:56:15,603 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:56:16,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:16,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:16,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:16,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:16,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:16,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:16,737 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 10:56:16,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 39 [2023-02-14 10:56:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-02-14 10:56:16,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:56:17,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623420488] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:56:17,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:56:17,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2023-02-14 10:56:17,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907727281] [2023-02-14 10:56:17,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:56:17,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-14 10:56:17,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:56:17,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-14 10:56:17,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1593, Unknown=1, NotChecked=80, Total=1806 [2023-02-14 10:56:17,426 INFO L87 Difference]: Start difference. First operand 127 states and 154 transitions. Second operand has 41 states, 34 states have (on average 2.411764705882353) internal successors, (82), 36 states have internal predecessors, (82), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 10:56:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:56:21,299 INFO L93 Difference]: Finished difference Result 251 states and 308 transitions. [2023-02-14 10:56:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 10:56:21,300 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 2.411764705882353) internal successors, (82), 36 states have internal predecessors, (82), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2023-02-14 10:56:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:56:21,302 INFO L225 Difference]: With dead ends: 251 [2023-02-14 10:56:21,302 INFO L226 Difference]: Without dead ends: 181 [2023-02-14 10:56:21,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=265, Invalid=2818, Unknown=1, NotChecked=108, Total=3192 [2023-02-14 10:56:21,304 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 183 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-02-14 10:56:21,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 860 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2009 Invalid, 0 Unknown, 170 Unchecked, 2.7s Time] [2023-02-14 10:56:21,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-14 10:56:21,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 148. [2023-02-14 10:56:21,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 128 states have internal predecessors, (144), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 10:56:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 179 transitions. [2023-02-14 10:56:21,336 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 179 transitions. Word has length 50 [2023-02-14 10:56:21,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:56:21,336 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 179 transitions. [2023-02-14 10:56:21,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 2.411764705882353) internal successors, (82), 36 states have internal predecessors, (82), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 10:56:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 179 transitions. [2023-02-14 10:56:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 10:56:21,338 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:56:21,339 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:56:21,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 10:56:21,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:56:21,540 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:56:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:56:21,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1808852267, now seen corresponding path program 1 times [2023-02-14 10:56:21,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:56:21,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996907027] [2023-02-14 10:56:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:56:21,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:56:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:56:23,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:56:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:56:24,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 10:56:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:56:25,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 10:56:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:56:27,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 10:56:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:56:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 10:56:27,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:56:27,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996907027] [2023-02-14 10:56:27,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996907027] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:56:27,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165584426] [2023-02-14 10:56:27,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:56:27,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:56:27,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:56:27,581 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) [2023-02-14 10:56:27,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 10:56:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:56:27,776 WARN L261 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 231 conjunts are in the unsatisfiable core [2023-02-14 10:56:27,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:56:27,818 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-14 10:56:27,818 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 102 treesize of output 99 [2023-02-14 10:56:27,917 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 16 treesize of output 10 [2023-02-14 10:56:28,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:28,024 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 17 [2023-02-14 10:56:28,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:28,039 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 17 [2023-02-14 10:56:28,144 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2023-02-14 10:56:28,144 INFO L350 Elim1Store]: Elim1 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 62 treesize of output 61 [2023-02-14 10:56:28,172 INFO L321 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2023-02-14 10:56:28,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 73 [2023-02-14 10:56:28,214 INFO L321 Elim1Store]: treesize reduction 40, result has 46.7 percent of original size [2023-02-14 10:56:28,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 45 [2023-02-14 10:56:28,223 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2023-02-14 10:56:28,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2023-02-14 10:56:28,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 28 [2023-02-14 10:56:28,303 INFO L321 Elim1Store]: treesize reduction 14, result has 56.3 percent of original size [2023-02-14 10:56:28,303 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 104 [2023-02-14 10:56:28,392 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:56:28,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 87 [2023-02-14 10:56:28,622 INFO L321 Elim1Store]: treesize reduction 264, result has 13.4 percent of original size [2023-02-14 10:56:28,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 115 treesize of output 168 [2023-02-14 10:56:28,650 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:56:28,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 20 [2023-02-14 10:56:28,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:56:28,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 59 [2023-02-14 10:56:28,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2023-02-14 10:56:28,934 INFO L350 Elim1Store]: Elim1 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 87 treesize of output 63 [2023-02-14 10:56:29,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:56:29,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 38 [2023-02-14 10:56:29,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-02-14 10:56:29,098 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 21 treesize of output 13 [2023-02-14 10:56:29,336 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2050 (Array Int Int)) (v_ArrVal_2045 Int) (v_ArrVal_2049 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_2046 (Array Int Int)) (v_ArrVal_2056 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_2046 0 (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2046) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_2050)) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| v_ArrVal_2045)) (= |c_#memory_$Pointer$.offset| (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_2049) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_2056) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0))) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-02-14 10:56:29,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:29,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:29,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:29,400 INFO L321 Elim1Store]: treesize reduction 52, result has 8.8 percent of original size [2023-02-14 10:56:29,400 INFO L350 Elim1Store]: Elim1 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 91 treesize of output 83 [2023-02-14 10:56:29,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:29,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:29,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:29,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:29,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 43 [2023-02-14 10:56:29,425 INFO L350 Elim1Store]: Elim1 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 69 treesize of output 51 [2023-02-14 10:56:29,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-14 10:56:29,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:29,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:29,464 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-02-14 10:56:29,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 57 [2023-02-14 10:56:29,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 15 [2023-02-14 10:56:29,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 42 [2023-02-14 10:56:29,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:29,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:29,881 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2023-02-14 10:56:29,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 84 [2023-02-14 10:56:30,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:30,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:56:30,072 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 83 treesize of output 42 [2023-02-14 10:56:30,081 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2023-02-14 10:56:30,085 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 21 treesize of output 13 [2023-02-14 10:56:30,246 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2060 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_2068 (Array Int Int)) (v_ArrVal_2066 (Array Int Int)) (v_ArrVal_2065 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_2060 0 (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2060) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_2066)) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_2068) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_2065) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0)) |c_#memory_$Pointer$.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-02-14 10:56:30,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:30,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:30,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:30,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:30,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 55 [2023-02-14 10:56:30,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:30,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:30,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:30,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:30,331 INFO L321 Elim1Store]: treesize reduction 74, result has 16.9 percent of original size [2023-02-14 10:56:30,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 98 [2023-02-14 10:56:30,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:30,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:30,356 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-02-14 10:56:30,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2023-02-14 10:56:30,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 15 [2023-02-14 10:56:30,369 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2023-02-14 10:56:30,374 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2023-02-14 10:56:30,379 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2023-02-14 10:56:31,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:31,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:56:31,803 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:56:31,803 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:56:31,812 INFO L321 Elim1Store]: treesize reduction 28, result has 22.2 percent of original size [2023-02-14 10:56:31,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 125 treesize of output 62 [2023-02-14 10:56:31,821 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 10:56:31,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 24 [2023-02-14 10:56:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 6 refuted. 3 times theorem prover too weak. 1 trivial. 6 not checked. [2023-02-14 10:56:31,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:56:42,424 WARN L233 SmtUtils]: Spent 10.16s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 10:56:52,677 WARN L233 SmtUtils]: Spent 10.11s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 10:57:02,991 WARN L233 SmtUtils]: Spent 10.18s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 10:57:03,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165584426] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:57:03,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:57:03,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 49 [2023-02-14 10:57:03,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967340432] [2023-02-14 10:57:03,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:57:03,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-14 10:57:03,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:57:03,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-14 10:57:03,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2855, Unknown=4, NotChecked=218, Total=3306 [2023-02-14 10:57:03,673 INFO L87 Difference]: Start difference. First operand 148 states and 179 transitions. Second operand has 49 states, 41 states have (on average 2.073170731707317) internal successors, (85), 45 states have internal predecessors, (85), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 10:57:13,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:57:13,963 INFO L93 Difference]: Finished difference Result 322 states and 399 transitions. [2023-02-14 10:57:13,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-14 10:57:13,964 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 41 states have (on average 2.073170731707317) internal successors, (85), 45 states have internal predecessors, (85), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 53 [2023-02-14 10:57:13,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:57:13,966 INFO L225 Difference]: With dead ends: 322 [2023-02-14 10:57:13,966 INFO L226 Difference]: Without dead ends: 319 [2023-02-14 10:57:13,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=634, Invalid=6680, Unknown=4, NotChecked=338, Total=7656 [2023-02-14 10:57:13,969 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 596 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 3138 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 3752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 3138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-02-14 10:57:13,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 987 Invalid, 3752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 3138 Invalid, 0 Unknown, 382 Unchecked, 4.8s Time] [2023-02-14 10:57:13,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-02-14 10:57:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 147. [2023-02-14 10:57:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 127 states have internal predecessors, (143), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 10:57:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2023-02-14 10:57:14,015 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 53 [2023-02-14 10:57:14,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:57:14,016 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2023-02-14 10:57:14,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 41 states have (on average 2.073170731707317) internal successors, (85), 45 states have internal predecessors, (85), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 10:57:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2023-02-14 10:57:14,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-14 10:57:14,017 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:57:14,018 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:57:14,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 10:57:14,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:57:14,225 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:57:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:57:14,225 INFO L85 PathProgramCache]: Analyzing trace with hash 992893756, now seen corresponding path program 1 times [2023-02-14 10:57:14,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:57:14,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566718504] [2023-02-14 10:57:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:57:14,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:57:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:16,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:57:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:16,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 10:57:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:16,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 10:57:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:18,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-14 10:57:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:19,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-14 10:57:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 10:57:19,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:57:19,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566718504] [2023-02-14 10:57:19,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566718504] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:57:19,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415677575] [2023-02-14 10:57:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:57:19,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:57:19,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:57:19,662 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) [2023-02-14 10:57:19,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 10:57:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:19,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 171 conjunts are in the unsatisfiable core [2023-02-14 10:57:19,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:57:19,907 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 12 [2023-02-14 10:57:19,991 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:57:20,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:20,045 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 17 [2023-02-14 10:57:20,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:20,050 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 17 [2023-02-14 10:57:20,119 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2023-02-14 10:57:20,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 61 [2023-02-14 10:57:20,142 INFO L321 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2023-02-14 10:57:20,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 73 [2023-02-14 10:57:20,180 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2023-02-14 10:57:20,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 61 [2023-02-14 10:57:20,208 INFO L321 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2023-02-14 10:57:20,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 73 [2023-02-14 10:57:20,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 10:57:20,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 10:57:20,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-02-14 10:57:20,252 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:57:20,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 28 [2023-02-14 10:57:20,302 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2023-02-14 10:57:20,302 INFO L350 Elim1Store]: Elim1 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 56 treesize of output 70 [2023-02-14 10:57:20,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2023-02-14 10:57:20,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 [2023-02-14 10:57:20,387 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 10:57:20,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 10:57:20,411 INFO L321 Elim1Store]: treesize reduction 65, result has 7.1 percent of original size [2023-02-14 10:57:20,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 101 treesize of output 152 [2023-02-14 10:57:20,540 INFO L321 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2023-02-14 10:57:20,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 106 [2023-02-14 10:57:20,581 INFO L321 Elim1Store]: treesize reduction 53, result has 37.6 percent of original size [2023-02-14 10:57:20,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 79 treesize of output 127 [2023-02-14 10:57:20,604 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-02-14 10:57:20,604 INFO L350 Elim1Store]: Elim1 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 68 treesize of output 60 [2023-02-14 10:57:20,645 INFO L350 Elim1Store]: Elim1 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 74 treesize of output 58 [2023-02-14 10:57:20,672 INFO L350 Elim1Store]: Elim1 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 98 treesize of output 78 [2023-02-14 10:57:20,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:57:20,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 43 [2023-02-14 10:57:20,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:20,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:20,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-02-14 10:57:21,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:57:21,047 INFO L350 Elim1Store]: Elim1 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 50 treesize of output 25 [2023-02-14 10:57:21,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-02-14 10:57:21,055 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:57:21,217 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2506 (Array Int Int)) (v_ArrVal_2505 (Array Int Int)) (v_ArrVal_2503 (Array Int Int)) (v_ArrVal_2501 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (= (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_2505) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_2503) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0)) |c_#memory_$Pointer$.offset|) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2501) |c_chain_node_#in~ppnode#1.base| v_ArrVal_2506) |c_#memory_$Pointer$.base|) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| 1)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-02-14 10:57:21,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2023-02-14 10:57:21,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-02-14 10:57:21,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,273 INFO L321 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2023-02-14 10:57:21,273 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 59 [2023-02-14 10:57:21,280 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2023-02-14 10:57:21,295 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-14 10:57:21,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-02-14 10:57:21,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:57:21,432 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 26 [2023-02-14 10:57:21,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-02-14 10:57:21,440 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:57:21,596 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2513 (Array Int Int)) (v_ArrVal_2511 (Array Int Int)) (v_ArrVal_2510 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_2507 (Array Int Int))) (and (= |c_#memory_$Pointer$.offset| (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_2507 0 (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_2507) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_2511)) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2510) |c_chain_node_#in~ppnode#1.base| v_ArrVal_2513) |c_#memory_$Pointer$.base|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-02-14 10:57:21,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 45 [2023-02-14 10:57:21,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:21,642 INFO L321 Elim1Store]: treesize reduction 39, result has 11.4 percent of original size [2023-02-14 10:57:21,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 67 [2023-02-14 10:57:21,660 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-02-14 10:57:21,660 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 22 [2023-02-14 10:57:21,663 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2023-02-14 10:57:21,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 10:57:22,133 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:57:22,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:57:22,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 42 [2023-02-14 10:57:22,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:22,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:22,142 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 10:57:22,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2023-02-14 10:57:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2023-02-14 10:57:22,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:57:22,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415677575] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:57:22,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:57:22,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2023-02-14 10:57:22,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589043839] [2023-02-14 10:57:22,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:57:22,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-14 10:57:22,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:57:22,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-14 10:57:22,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1132, Unknown=3, NotChecked=138, Total=1406 [2023-02-14 10:57:22,480 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand has 36 states, 32 states have (on average 2.78125) internal successors, (89), 34 states have internal predecessors, (89), 9 states have call successors, (11), 5 states have call predecessors, (11), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-14 10:57:26,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:57:26,328 INFO L93 Difference]: Finished difference Result 211 states and 253 transitions. [2023-02-14 10:57:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 10:57:26,329 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 2.78125) internal successors, (89), 34 states have internal predecessors, (89), 9 states have call successors, (11), 5 states have call predecessors, (11), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 59 [2023-02-14 10:57:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:57:26,330 INFO L225 Difference]: With dead ends: 211 [2023-02-14 10:57:26,330 INFO L226 Difference]: Without dead ends: 208 [2023-02-14 10:57:26,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=250, Invalid=1915, Unknown=5, NotChecked=182, Total=2352 [2023-02-14 10:57:26,332 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 161 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1643 mSolverCounterSat, 62 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1643 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:57:26,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 613 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1643 Invalid, 3 Unknown, 278 Unchecked, 2.0s Time] [2023-02-14 10:57:26,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-02-14 10:57:26,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 121. [2023-02-14 10:57:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 97 states have (on average 1.1958762886597938) internal successors, (116), 104 states have internal predecessors, (116), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 10:57:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2023-02-14 10:57:26,367 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 59 [2023-02-14 10:57:26,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:57:26,367 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2023-02-14 10:57:26,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 2.78125) internal successors, (89), 34 states have internal predecessors, (89), 9 states have call successors, (11), 5 states have call predecessors, (11), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-14 10:57:26,368 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2023-02-14 10:57:26,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-14 10:57:26,368 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:57:26,369 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:57:26,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 10:57:26,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:57:26,573 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:57:26,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:57:26,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1079080327, now seen corresponding path program 1 times [2023-02-14 10:57:26,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:57:26,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171387840] [2023-02-14 10:57:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:57:26,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:57:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:28,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:57:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:29,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 10:57:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:30,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 10:57:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:31,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-14 10:57:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 10:57:33,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:57:33,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171387840] [2023-02-14 10:57:33,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171387840] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:57:33,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220631125] [2023-02-14 10:57:33,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:57:33,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:57:33,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:57:33,100 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:57:33,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 10:57:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:33,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 235 conjunts are in the unsatisfiable core [2023-02-14 10:57:33,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:57:33,410 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-14 10:57:33,411 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 35 treesize of output 34 [2023-02-14 10:57:33,554 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:57:33,739 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 10:57:33,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 10:57:33,760 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 10:57:33,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 10:57:33,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 10:57:33,772 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:57:33,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 10:57:33,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 10:57:33,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2023-02-14 10:57:33,817 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:57:33,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 9 [2023-02-14 10:57:33,846 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2023-02-14 10:57:33,979 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-02-14 10:57:33,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 68 [2023-02-14 10:57:34,017 INFO L321 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-02-14 10:57:34,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 12 [2023-02-14 10:57:34,396 INFO L321 Elim1Store]: treesize reduction 23, result has 43.9 percent of original size [2023-02-14 10:57:34,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 90 [2023-02-14 10:57:34,417 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2023-02-14 10:57:34,435 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:57:34,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-02-14 10:57:34,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-14 10:57:34,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-02-14 10:57:34,611 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:57:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:34,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:34,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-02-14 10:57:35,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-02-14 10:57:35,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2023-02-14 10:57:35,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-02-14 10:57:35,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2023-02-14 10:57:35,031 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 15 [2023-02-14 10:57:35,037 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 15 [2023-02-14 10:57:35,264 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-02-14 10:57:35,264 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 54 [2023-02-14 10:57:35,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2023-02-14 10:57:35,407 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-02-14 10:57:35,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 36 [2023-02-14 10:57:35,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2023-02-14 10:57:35,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,419 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:57:35,639 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2948 Int) (v_ArrVal_2955 (Array Int Int)) (v_ArrVal_2953 (Array Int Int)) (v_ArrVal_2952 (Array Int Int)) (v_ArrVal_2951 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$.offset| (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_2953) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_2951) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0))) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2955) |c_chain_node_#in~ppnode#1.base| v_ArrVal_2952)) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| v_ArrVal_2948)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-02-14 10:57:35,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 55 [2023-02-14 10:57:35,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,698 INFO L321 Elim1Store]: treesize reduction 55, result has 8.3 percent of original size [2023-02-14 10:57:35,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 78 treesize of output 79 [2023-02-14 10:57:35,705 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 45 [2023-02-14 10:57:35,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,729 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-02-14 10:57:35,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 37 [2023-02-14 10:57:35,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-02-14 10:57:35,922 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-02-14 10:57:35,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 33 [2023-02-14 10:57:35,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2023-02-14 10:57:35,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:35,940 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:57:36,125 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2957 (Array Int Int)) (v_ArrVal_2966 (Array Int Int)) (v_ArrVal_2963 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (let ((.cse0 (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_2957 0 (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_2957) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse0 |c_chain_node_#in~ppnode#1.base| (store (select .cse0 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0))) |c_#memory_$Pointer$.offset|) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2966) |c_chain_node_#in~ppnode#1.base| v_ArrVal_2963)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-02-14 10:57:36,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:36,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:36,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:36,166 INFO L321 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2023-02-14 10:57:36,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 88 [2023-02-14 10:57:36,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:36,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:36,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:36,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:36,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:36,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:36,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:36,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:36,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2023-02-14 10:57:36,185 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2023-02-14 10:57:36,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-02-14 10:57:36,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:36,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:36,199 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 10:57:36,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2023-02-14 10:57:37,262 INFO L321 Elim1Store]: treesize reduction 33, result has 8.3 percent of original size [2023-02-14 10:57:37,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 64 [2023-02-14 10:57:37,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:37,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:37,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:37,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:37,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:37,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:57:37,284 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 10:57:37,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 28 [2023-02-14 10:57:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 18 refuted. 2 times theorem prover too weak. 4 trivial. 10 not checked. [2023-02-14 10:57:37,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:57:37,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220631125] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:57:37,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:57:37,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 54 [2023-02-14 10:57:37,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12472936] [2023-02-14 10:57:37,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:57:37,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-14 10:57:37,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:57:37,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-14 10:57:37,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2871, Unknown=5, NotChecked=218, Total=3306 [2023-02-14 10:57:37,927 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand has 54 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 49 states have internal predecessors, (95), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 10:57:44,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:57:46,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:57:51,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:57:53,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:57:54,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:57:54,092 INFO L93 Difference]: Finished difference Result 239 states and 289 transitions. [2023-02-14 10:57:54,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 10:57:54,093 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 49 states have internal predecessors, (95), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 59 [2023-02-14 10:57:54,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:57:54,094 INFO L225 Difference]: With dead ends: 239 [2023-02-14 10:57:54,094 INFO L226 Difference]: Without dead ends: 170 [2023-02-14 10:57:54,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=362, Invalid=4323, Unknown=15, NotChecked=270, Total=4970 [2023-02-14 10:57:54,098 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 279 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 101 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 2805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2023-02-14 10:57:54,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 942 Invalid, 2805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2348 Invalid, 26 Unknown, 330 Unchecked, 12.4s Time] [2023-02-14 10:57:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-14 10:57:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 121. [2023-02-14 10:57:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 97 states have (on average 1.1958762886597938) internal successors, (116), 104 states have internal predecessors, (116), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 10:57:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2023-02-14 10:57:54,135 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 59 [2023-02-14 10:57:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:57:54,136 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2023-02-14 10:57:54,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 49 states have internal predecessors, (95), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 10:57:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2023-02-14 10:57:54,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-14 10:57:54,137 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:57:54,137 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:57:54,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 10:57:54,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-14 10:57:54,337 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:57:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:57:54,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1740102043, now seen corresponding path program 1 times [2023-02-14 10:57:54,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:57:54,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108324049] [2023-02-14 10:57:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:57:54,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:57:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:56,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:57:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:56,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 10:57:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:56,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 10:57:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:57,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-14 10:57:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 10:57:59,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:57:59,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108324049] [2023-02-14 10:57:59,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108324049] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:57:59,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886330781] [2023-02-14 10:57:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:57:59,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:57:59,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:57:59,592 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:57:59,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 10:57:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:57:59,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 190 conjunts are in the unsatisfiable core [2023-02-14 10:57:59,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:57:59,889 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2023-02-14 10:57:59,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 27 [2023-02-14 10:57:59,959 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 10:57:59,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 10:58:00,136 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 10:58:00,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 10:58:00,140 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2023-02-14 10:58:00,144 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:58:00,183 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-02-14 10:58:00,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 42 [2023-02-14 10:58:00,185 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 22 [2023-02-14 10:58:00,328 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-14 10:58:00,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2023-02-14 10:58:00,494 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 47 [2023-02-14 10:58:00,502 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2023-02-14 10:58:00,615 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 10 [2023-02-14 10:58:00,620 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 10:58:00,620 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-02-14 10:58:00,826 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 10:58:00,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 10:58:00,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 10:58:00,841 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:58:00,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 39 [2023-02-14 10:58:00,883 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 35 [2023-02-14 10:58:00,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-02-14 10:58:01,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:01,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:01,122 INFO L350 Elim1Store]: Elim1 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 43 treesize of output 36 [2023-02-14 10:58:01,128 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 13 [2023-02-14 10:58:01,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-14 10:58:01,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:01,155 INFO L321 Elim1Store]: treesize reduction 82, result has 31.7 percent of original size [2023-02-14 10:58:01,155 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 42 treesize of output 61 [2023-02-14 10:58:01,361 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-02-14 10:58:01,361 INFO L350 Elim1Store]: Elim1 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 105 treesize of output 44 [2023-02-14 10:58:01,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:01,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:01,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-14 10:58:01,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:01,373 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 10:58:01,374 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 16 treesize of output 10 [2023-02-14 10:58:02,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 85 [2023-02-14 10:58:02,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,105 INFO L321 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2023-02-14 10:58:02,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 68 [2023-02-14 10:58:02,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2023-02-14 10:58:02,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 70 treesize of output 55 [2023-02-14 10:58:02,129 INFO L350 Elim1Store]: Elim1 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 46 treesize of output 38 [2023-02-14 10:58:02,137 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:58:02,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,175 INFO L321 Elim1Store]: treesize reduction 108, result has 32.1 percent of original size [2023-02-14 10:58:02,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 77 [2023-02-14 10:58:02,189 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:58:02,473 INFO L321 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2023-02-14 10:58:02,474 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 189 treesize of output 83 [2023-02-14 10:58:02,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 106 [2023-02-14 10:58:02,643 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2023-02-14 10:58:02,643 INFO L350 Elim1Store]: Elim1 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 5 case distinctions, treesize of input 185 treesize of output 58 [2023-02-14 10:58:02,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,653 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 10:58:02,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2023-02-14 10:58:02,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 10:58:02,839 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3409 (Array Int Int)) (v_ArrVal_3410 (Array Int Int)) (v_ArrVal_3411 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_3412 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_3411) |c_chain_node_#in~ppnode#1.base| v_ArrVal_3409) |c_#memory_$Pointer$.base|) (= (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_3412) |c_chain_node_#in~ppnode#1.base| v_ArrVal_3410) |c_#memory_$Pointer$.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-02-14 10:58:02,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,894 INFO L321 Elim1Store]: treesize reduction 100, result has 9.9 percent of original size [2023-02-14 10:58:02,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 220 treesize of output 152 [2023-02-14 10:58:02,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 120 [2023-02-14 10:58:02,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:02,940 INFO L321 Elim1Store]: treesize reduction 40, result has 52.9 percent of original size [2023-02-14 10:58:02,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 58 treesize of output 60 [2023-02-14 10:58:02,956 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2023-02-14 10:58:03,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:03,627 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 10:58:03,627 INFO L350 Elim1Store]: Elim1 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 122 treesize of output 84 [2023-02-14 10:58:03,776 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-02-14 10:58:03,777 INFO L350 Elim1Store]: Elim1 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 122 treesize of output 40 [2023-02-14 10:58:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 19 refuted. 4 times theorem prover too weak. 1 trivial. 6 not checked. [2023-02-14 10:58:03,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:58:03,872 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_chain_node_~node~0#1.base_32| Int) (v_ArrVal_3425 (Array Int Int)) (v_ArrVal_3426 (Array Int Int)) (v_ArrVal_3427 (Array Int Int)) (v_ArrVal_3428 (Array Int Int))) (or (not (= (let ((.cse3 (store (store |c_#memory_$Pointer$.offset| |v_chain_node_~node~0#1.base_32| v_ArrVal_3428) |c_ULTIMATE.start_create_sll_~#list~0#1.base| v_ArrVal_3426)) (.cse0 (store (store |c_#memory_$Pointer$.base| |v_chain_node_~node~0#1.base_32| v_ArrVal_3427) |c_ULTIMATE.start_create_sll_~#list~0#1.base| v_ArrVal_3425))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~#p1~0#1.base|) |c_ULTIMATE.start_main_~#p1~0#1.offset|))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))) 0)) (not (< |v_chain_node_~node~0#1.base_32| |c_#StackHeapBarrier|)) (not (= (select |c_#valid| |v_chain_node_~node~0#1.base_32|) 0)))) is different from false [2023-02-14 10:58:03,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886330781] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:58:03,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:58:03,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 53 [2023-02-14 10:58:03,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057609474] [2023-02-14 10:58:03,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:58:03,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-14 10:58:03,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:58:03,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-14 10:58:03,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2488, Unknown=10, NotChecked=202, Total=2862 [2023-02-14 10:58:03,875 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand has 53 states, 45 states have (on average 2.088888888888889) internal successors, (94), 47 states have internal predecessors, (94), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 10:58:10,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:58:14,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:58:17,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:58:20,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:58:21,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:58:25,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 10:58:26,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:58:26,627 INFO L93 Difference]: Finished difference Result 235 states and 288 transitions. [2023-02-14 10:58:26,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-14 10:58:26,628 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 45 states have (on average 2.088888888888889) internal successors, (94), 47 states have internal predecessors, (94), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 59 [2023-02-14 10:58:26,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:58:26,629 INFO L225 Difference]: With dead ends: 235 [2023-02-14 10:58:26,629 INFO L226 Difference]: Without dead ends: 232 [2023-02-14 10:58:26,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=439, Invalid=5246, Unknown=23, NotChecked=298, Total=6006 [2023-02-14 10:58:26,631 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 285 mSDsluCounter, 2386 mSDsCounter, 0 mSdLazyCounter, 5102 mSolverCounterSat, 132 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2498 SdHoareTripleChecker+Invalid, 5493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 5102 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2023-02-14 10:58:26,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 2498 Invalid, 5493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 5102 Invalid, 27 Unknown, 232 Unchecked, 18.5s Time] [2023-02-14 10:58:26,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-02-14 10:58:26,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 125. [2023-02-14 10:58:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 101 states have (on average 1.198019801980198) internal successors, (121), 108 states have internal predecessors, (121), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 10:58:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2023-02-14 10:58:26,672 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 59 [2023-02-14 10:58:26,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:58:26,672 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2023-02-14 10:58:26,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 45 states have (on average 2.088888888888889) internal successors, (94), 47 states have internal predecessors, (94), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 10:58:26,672 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2023-02-14 10:58:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-14 10:58:26,673 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:58:26,673 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:58:26,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 10:58:26,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 10:58:26,874 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:58:26,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:58:26,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1802853032, now seen corresponding path program 1 times [2023-02-14 10:58:26,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:58:26,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804681719] [2023-02-14 10:58:26,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:58:26,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:58:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:58:27,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:58:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:58:27,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 10:58:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:58:27,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 10:58:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:58:27,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 10:58:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:58:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:58:27,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:58:27,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804681719] [2023-02-14 10:58:27,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804681719] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:58:27,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701351293] [2023-02-14 10:58:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:58:27,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:58:27,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:58:27,098 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:58:27,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 10:58:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:58:27,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-14 10:58:27,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:58:27,476 INFO L350 Elim1Store]: Elim1 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 17 [2023-02-14 10:58:27,478 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 13 [2023-02-14 10:58:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:58:27,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:58:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:58:27,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701351293] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:58:27,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:58:27,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 12 [2023-02-14 10:58:27,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293069228] [2023-02-14 10:58:27,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:58:27,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 10:58:27,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:58:27,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 10:58:27,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-14 10:58:27,668 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand has 12 states, 9 states have (on average 5.888888888888889) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-14 10:58:28,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:58:28,021 INFO L93 Difference]: Finished difference Result 152 states and 184 transitions. [2023-02-14 10:58:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 10:58:28,022 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 5.888888888888889) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 63 [2023-02-14 10:58:28,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:58:28,023 INFO L225 Difference]: With dead ends: 152 [2023-02-14 10:58:28,023 INFO L226 Difference]: Without dead ends: 149 [2023-02-14 10:58:28,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-02-14 10:58:28,024 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 91 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 10:58:28,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 284 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 10:58:28,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-14 10:58:28,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 133. [2023-02-14 10:58:28,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 115 states have internal predecessors, (129), 19 states have call successors, (19), 7 states have call predecessors, (19), 5 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-14 10:58:28,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 160 transitions. [2023-02-14 10:58:28,062 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 160 transitions. Word has length 63 [2023-02-14 10:58:28,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:58:28,062 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 160 transitions. [2023-02-14 10:58:28,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 5.888888888888889) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-14 10:58:28,062 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 160 transitions. [2023-02-14 10:58:28,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-14 10:58:28,063 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:58:28,063 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:58:28,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 10:58:28,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 10:58:28,265 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:58:28,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:58:28,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1473312201, now seen corresponding path program 2 times [2023-02-14 10:58:28,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:58:28,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629200412] [2023-02-14 10:58:28,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:58:28,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:58:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:58:30,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:58:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:58:30,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 10:58:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:58:31,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 10:58:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:58:34,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-14 10:58:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:58:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 10:58:35,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:58:35,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629200412] [2023-02-14 10:58:35,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629200412] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:58:35,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470772394] [2023-02-14 10:58:35,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:58:35,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:58:35,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:58:35,830 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:58:35,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 10:58:36,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:58:36,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:58:36,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 245 conjunts are in the unsatisfiable core [2023-02-14 10:58:36,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:58:36,167 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-14 10:58:36,167 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 35 treesize of output 34 [2023-02-14 10:58:36,261 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 16 treesize of output 10 [2023-02-14 10:58:36,520 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 10:58:36,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 10:58:36,541 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 10:58:36,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 10:58:36,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 10:58:36,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 10:58:36,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 10:58:36,566 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:58:36,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 15 [2023-02-14 10:58:36,606 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:58:36,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 19 [2023-02-14 10:58:36,628 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2023-02-14 10:58:36,893 INFO L321 Elim1Store]: treesize reduction 42, result has 48.8 percent of original size [2023-02-14 10:58:36,893 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 26 treesize of output 58 [2023-02-14 10:58:37,145 INFO L350 Elim1Store]: Elim1 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 55 treesize of output 42 [2023-02-14 10:58:37,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-02-14 10:58:37,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2023-02-14 10:58:37,299 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 28 treesize of output 22 [2023-02-14 10:58:37,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 10:58:37,565 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_4127 (Array Int Int)) (v_ArrVal_4128 (Array Int Int))) (and (= (let ((.cse0 (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_4128 0 (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_4128) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse0 |c_chain_node_#in~ppnode#1.base| (store (select .cse0 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (let ((.cse1 (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_4127 0 (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_4127) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse1 |c_chain_node_#in~ppnode#1.base| (store (select .cse1 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| 0)))) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| 1)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-02-14 10:58:37,745 INFO L321 Elim1Store]: treesize reduction 153, result has 28.8 percent of original size [2023-02-14 10:58:37,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 133 treesize of output 294 [2023-02-14 10:58:37,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 185 [2023-02-14 10:58:38,076 INFO L321 Elim1Store]: treesize reduction 153, result has 28.8 percent of original size [2023-02-14 10:58:38,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 169 treesize of output 324 [2023-02-14 10:58:38,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 78 [2023-02-14 10:58:38,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 261 [2023-02-14 10:58:38,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2023-02-14 10:58:38,486 INFO L321 Elim1Store]: treesize reduction 42, result has 64.4 percent of original size [2023-02-14 10:58:38,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 115 [2023-02-14 10:58:38,777 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-14 10:58:39,069 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:39,079 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:39,080 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:39,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 318 [2023-02-14 10:58:39,168 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:39,168 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:39,169 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:39,172 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:39,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 318 [2023-02-14 10:58:39,247 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:39,248 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:39,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 143 [2023-02-14 10:58:39,458 INFO L321 Elim1Store]: treesize reduction 148, result has 9.2 percent of original size [2023-02-14 10:58:39,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 338 treesize of output 325 [2023-02-14 10:58:39,669 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:39,673 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:39,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 7 [2023-02-14 10:58:39,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 1 [2023-02-14 10:58:40,031 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:40,034 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:40,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 86 treesize of output 81 [2023-02-14 10:58:40,094 INFO L321 Elim1Store]: treesize reduction 52, result has 33.3 percent of original size [2023-02-14 10:58:40,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 415 treesize of output 329 [2023-02-14 10:58:40,099 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:40,102 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:40,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 342 [2023-02-14 10:58:40,290 INFO L350 Elim1Store]: Elim1 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 5 [2023-02-14 10:58:40,353 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:40,353 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:40,354 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:40,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 100 treesize of output 103 [2023-02-14 10:58:40,465 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:40,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 5 [2023-02-14 10:58:40,578 INFO L350 Elim1Store]: Elim1 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 80 treesize of output 70 [2023-02-14 10:58:40,795 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:40,798 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:40,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 15 [2023-02-14 10:58:49,183 WARN L233 SmtUtils]: Spent 7.60s on a formula simplification. DAG size of input: 225 DAG size of output: 165 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 10:58:49,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:49,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:58:49,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 3621 treesize of output 3628 [2023-02-14 10:58:49,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:49,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:58:49,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 4165 treesize of output 3662 [2023-02-14 10:58:50,024 INFO L321 Elim1Store]: treesize reduction 10, result has 86.3 percent of original size [2023-02-14 10:58:50,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 3607 treesize of output 3642 [2023-02-14 10:58:50,098 INFO L350 Elim1Store]: Elim1 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 3579 treesize of output 3565 [2023-02-14 10:58:50,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-02-14 10:58:50,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 153 [2023-02-14 10:58:50,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 153 [2023-02-14 10:58:50,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-02-14 10:58:50,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-02-14 10:58:50,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 97 [2023-02-14 10:58:50,332 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-14 10:58:50,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 153 [2023-02-14 10:58:50,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-02-14 10:58:51,014 INFO L350 Elim1Store]: Elim1 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 447 treesize of output 431 [2023-02-14 10:58:51,408 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-14 10:58:51,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:51,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:51,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:51,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:52,029 INFO L321 Elim1Store]: treesize reduction 70, result has 30.0 percent of original size [2023-02-14 10:58:52,029 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 6634 treesize of output 6643 [2023-02-14 10:58:52,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:52,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:52,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:52,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:52,179 INFO L321 Elim1Store]: treesize reduction 42, result has 30.0 percent of original size [2023-02-14 10:58:52,179 INFO L350 Elim1Store]: Elim1 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 7188 treesize of output 6466 [2023-02-14 10:58:52,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:52,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:52,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:52,320 INFO L321 Elim1Store]: treesize reduction 114, result has 24.5 percent of original size [2023-02-14 10:58:52,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 6414 treesize of output 6427 [2023-02-14 10:58:52,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6396 treesize of output 6370 [2023-02-14 10:58:52,515 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2023-02-14 10:58:52,604 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2023-02-14 10:58:52,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-02-14 10:58:52,879 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:52,883 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:52,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 11 [2023-02-14 10:58:52,899 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:52,903 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:52,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 11 [2023-02-14 10:58:52,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 157 [2023-02-14 10:58:52,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 157 [2023-02-14 10:58:52,970 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:52,973 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:52,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 11 [2023-02-14 10:58:52,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 157 [2023-02-14 10:58:53,034 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:53,039 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:53,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 11 [2023-02-14 10:58:53,053 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:53,058 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:58:53,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 11 [2023-02-14 10:58:53,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 99 [2023-02-14 10:58:53,123 INFO L350 Elim1Store]: Elim1 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 248 treesize of output 238 [2023-02-14 10:58:53,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-02-14 10:58:53,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-02-14 10:58:53,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 271 treesize of output 238 [2023-02-14 10:58:54,503 INFO L321 Elim1Store]: treesize reduction 112, result has 17.0 percent of original size [2023-02-14 10:58:54,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 422 treesize of output 220 [2023-02-14 10:58:54,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:54,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:54,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:54,529 INFO L321 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2023-02-14 10:58:54,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 375 treesize of output 325 [2023-02-14 10:58:55,102 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2023-02-14 10:58:55,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 474 treesize of output 232 [2023-02-14 10:58:55,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,132 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-02-14 10:58:55,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 202 treesize of output 198 [2023-02-14 10:58:55,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,159 INFO L321 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2023-02-14 10:58:55,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 182 treesize of output 153 [2023-02-14 10:58:55,564 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4163 (Array Int Int)) (|chain_node_~ppnode#1.offset| Int) (v_ArrVal_4167 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_4160 (Array Int Int)) (v_ArrVal_4161 (Array Int Int)) (|chain_node_~node~0#1.offset| Int)) (and (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_4161) |c_chain_node_#in~ppnode#1.base| v_ArrVal_4163) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_4160 |chain_node_~node~0#1.offset| (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_4160) |c_chain_node_#in~ppnode#1.base|) |chain_node_~ppnode#1.offset|))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_4167)) (<= (+ |chain_node_~node~0#1.base| 1) |c_#StackHeapBarrier|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2023-02-14 10:58:55,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,689 INFO L321 Elim1Store]: treesize reduction 104, result has 18.1 percent of original size [2023-02-14 10:58:55,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 501 treesize of output 388 [2023-02-14 10:58:55,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,725 INFO L321 Elim1Store]: treesize reduction 59, result has 23.4 percent of original size [2023-02-14 10:58:55,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 469 treesize of output 443 [2023-02-14 10:58:55,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:55,775 INFO L321 Elim1Store]: treesize reduction 30, result has 72.0 percent of original size [2023-02-14 10:58:55,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 363 treesize of output 385 [2023-02-14 10:58:55,788 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2023-02-14 10:58:56,054 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2023-02-14 10:58:56,208 INFO L350 Elim1Store]: Elim1 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 292 treesize of output 286 [2023-02-14 10:58:56,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:58:56,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 267 [2023-02-14 10:58:58,333 INFO L321 Elim1Store]: treesize reduction 110, result has 2.7 percent of original size [2023-02-14 10:58:58,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 213 treesize of output 89 [2023-02-14 10:58:58,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:58,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:58:58,343 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 10:58:58,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 25 [2023-02-14 10:58:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 10 not checked. [2023-02-14 10:58:58,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:59:03,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470772394] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:59:03,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:59:03,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 52 [2023-02-14 10:59:03,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707837698] [2023-02-14 10:59:03,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:59:03,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-14 10:59:03,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:59:03,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-14 10:59:03,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3123, Unknown=6, NotChecked=226, Total=3540 [2023-02-14 10:59:03,071 INFO L87 Difference]: Start difference. First operand 133 states and 160 transitions. Second operand has 52 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 47 states have internal predecessors, (96), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)