./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2n_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2n_append_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 13:53:16,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 13:53:16,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 13:53:16,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 13:53:16,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 13:53:16,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 13:53:16,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 13:53:16,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 13:53:16,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 13:53:16,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 13:53:16,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 13:53:16,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 13:53:16,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 13:53:16,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 13:53:16,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 13:53:16,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 13:53:16,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 13:53:16,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 13:53:16,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 13:53:16,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 13:53:16,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 13:53:16,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 13:53:16,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 13:53:16,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 13:53:16,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 13:53:16,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 13:53:16,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 13:53:16,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 13:53:16,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 13:53:16,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 13:53:16,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 13:53:16,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 13:53:16,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 13:53:16,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 13:53:16,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 13:53:16,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 13:53:16,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 13:53:16,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 13:53:16,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 13:53:16,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 13:53:16,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 13:53:16,813 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-14 13:53:16,849 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 13:53:16,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 13:53:16,850 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 13:53:16,850 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 13:53:16,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 13:53:16,851 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 13:53:16,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 13:53:16,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 13:53:16,852 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 13:53:16,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 13:53:16,854 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 13:53:16,854 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-14 13:53:16,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 13:53:16,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 13:53:16,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 13:53:16,855 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-14 13:53:16,855 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-14 13:53:16,855 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-14 13:53:16,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 13:53:16,856 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-14 13:53:16,856 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 13:53:16,856 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 13:53:16,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 13:53:16,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 13:53:16,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 13:53:16,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:53:16,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 13:53:16,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 13:53:16,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 13:53:16,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 13:53:16,858 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 13:53:16,859 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 13:53:16,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 13:53:16,859 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 13:53:16,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda [2023-02-14 13:53:17,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 13:53:17,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 13:53:17,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 13:53:17,149 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 13:53:17,149 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 13:53:17,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_append_equal.i [2023-02-14 13:53:18,287 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 13:53:18,541 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 13:53:18,542 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_append_equal.i [2023-02-14 13:53:18,558 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97fcf44af/05778fa32f8647fa86afeaf3e7ca4f77/FLAG06c331036 [2023-02-14 13:53:18,576 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97fcf44af/05778fa32f8647fa86afeaf3e7ca4f77 [2023-02-14 13:53:18,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 13:53:18,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 13:53:18,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 13:53:18,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 13:53:18,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 13:53:18,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:53:18" (1/1) ... [2023-02-14 13:53:18,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25b54a57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:18, skipping insertion in model container [2023-02-14 13:53:18,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:53:18" (1/1) ... [2023-02-14 13:53:18,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 13:53:18,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 13:53:18,887 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/list-simple/dll2n_append_equal.i[24333,24346] [2023-02-14 13:53:18,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:53:18,898 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 13:53:18,935 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/list-simple/dll2n_append_equal.i[24333,24346] [2023-02-14 13:53:18,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:53:18,967 INFO L208 MainTranslator]: Completed translation [2023-02-14 13:53:18,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:18 WrapperNode [2023-02-14 13:53:18,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 13:53:18,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 13:53:18,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 13:53:18,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 13:53:18,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:18" (1/1) ... [2023-02-14 13:53:19,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:18" (1/1) ... [2023-02-14 13:53:19,041 INFO L138 Inliner]: procedures = 127, calls = 37, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 125 [2023-02-14 13:53:19,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 13:53:19,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 13:53:19,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 13:53:19,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 13:53:19,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:18" (1/1) ... [2023-02-14 13:53:19,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:18" (1/1) ... [2023-02-14 13:53:19,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:18" (1/1) ... [2023-02-14 13:53:19,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:18" (1/1) ... [2023-02-14 13:53:19,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:18" (1/1) ... [2023-02-14 13:53:19,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:18" (1/1) ... [2023-02-14 13:53:19,074 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:18" (1/1) ... [2023-02-14 13:53:19,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:18" (1/1) ... [2023-02-14 13:53:19,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 13:53:19,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 13:53:19,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 13:53:19,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 13:53:19,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:18" (1/1) ... [2023-02-14 13:53:19,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:53:19,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:19,110 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 13:53:19,140 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 13:53:19,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 13:53:19,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 13:53:19,167 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-14 13:53:19,167 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-14 13:53:19,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 13:53:19,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 13:53:19,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 13:53:19,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-14 13:53:19,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-14 13:53:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 13:53:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-14 13:53:19,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 13:53:19,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 13:53:19,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 13:53:19,292 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 13:53:19,294 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 13:53:19,667 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 13:53:19,682 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 13:53:19,683 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-14 13:53:19,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:53:19 BoogieIcfgContainer [2023-02-14 13:53:19,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 13:53:19,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 13:53:19,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 13:53:19,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 13:53:19,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:53:18" (1/3) ... [2023-02-14 13:53:19,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aacb4e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:53:19, skipping insertion in model container [2023-02-14 13:53:19,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:18" (2/3) ... [2023-02-14 13:53:19,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aacb4e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:53:19, skipping insertion in model container [2023-02-14 13:53:19,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:53:19" (3/3) ... [2023-02-14 13:53:19,693 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2023-02-14 13:53:19,711 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 13:53:19,711 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2023-02-14 13:53:19,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 13:53:19,759 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@1176ed77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 13:53:19,759 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-02-14 13:53:19,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 93 states have internal predecessors, (106), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:53:19,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-14 13:53:19,768 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:19,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:19,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:19,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1815348631, now seen corresponding path program 1 times [2023-02-14 13:53:19,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:19,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267874822] [2023-02-14 13:53:19,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:19,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:20,026 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 13:53:20,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:20,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267874822] [2023-02-14 13:53:20,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267874822] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:20,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:20,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 13:53:20,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063052530] [2023-02-14 13:53:20,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:20,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 13:53:20,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:20,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 13:53:20,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 13:53:20,078 INFO L87 Difference]: Start difference. First operand has 97 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 93 states have internal predecessors, (106), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 13:53:20,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:20,172 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2023-02-14 13:53:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 13:53:20,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-14 13:53:20,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:20,182 INFO L225 Difference]: With dead ends: 94 [2023-02-14 13:53:20,182 INFO L226 Difference]: Without dead ends: 91 [2023-02-14 13:53:20,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 13:53:20,186 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 10 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:20,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:20,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-14 13:53:20,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-02-14 13:53:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.88) internal successors, (94), 87 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:53:20,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2023-02-14 13:53:20,220 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 7 [2023-02-14 13:53:20,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:20,221 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2023-02-14 13:53:20,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 13:53:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2023-02-14 13:53:20,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-14 13:53:20,222 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:20,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:20,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 13:53:20,222 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:20,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:20,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1815348632, now seen corresponding path program 1 times [2023-02-14 13:53:20,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:20,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832274394] [2023-02-14 13:53:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:20,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:20,327 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 13:53:20,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:20,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832274394] [2023-02-14 13:53:20,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832274394] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:20,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:20,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 13:53:20,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798722922] [2023-02-14 13:53:20,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:20,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 13:53:20,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:20,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 13:53:20,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 13:53:20,332 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 13:53:20,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:20,398 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2023-02-14 13:53:20,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 13:53:20,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-14 13:53:20,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:20,400 INFO L225 Difference]: With dead ends: 88 [2023-02-14 13:53:20,400 INFO L226 Difference]: Without dead ends: 88 [2023-02-14 13:53:20,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 13:53:20,401 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 5 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:20,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 144 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-14 13:53:20,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-02-14 13:53:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 50 states have (on average 1.82) internal successors, (91), 84 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:53:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2023-02-14 13:53:20,411 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 7 [2023-02-14 13:53:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:20,411 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2023-02-14 13:53:20,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 13:53:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2023-02-14 13:53:20,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 13:53:20,412 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:20,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:20,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 13:53:20,413 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:20,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:20,414 INFO L85 PathProgramCache]: Analyzing trace with hash 927333361, now seen corresponding path program 1 times [2023-02-14 13:53:20,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:20,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222565928] [2023-02-14 13:53:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:20,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:20,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:20,776 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 13:53:20,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:20,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222565928] [2023-02-14 13:53:20,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222565928] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:20,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:20,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 13:53:20,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020157734] [2023-02-14 13:53:20,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:20,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 13:53:20,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:20,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 13:53:20,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-14 13:53:20,785 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:53:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:21,013 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2023-02-14 13:53:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:53:21,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-02-14 13:53:21,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:21,021 INFO L225 Difference]: With dead ends: 91 [2023-02-14 13:53:21,021 INFO L226 Difference]: Without dead ends: 91 [2023-02-14 13:53:21,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-14 13:53:21,028 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 20 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:21,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 364 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:53:21,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-14 13:53:21,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2023-02-14 13:53:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 50 states have (on average 1.78) internal successors, (89), 82 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:53:21,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2023-02-14 13:53:21,048 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 14 [2023-02-14 13:53:21,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:21,048 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2023-02-14 13:53:21,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:53:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2023-02-14 13:53:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 13:53:21,049 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:21,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:21,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 13:53:21,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:21,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:21,052 INFO L85 PathProgramCache]: Analyzing trace with hash 927333360, now seen corresponding path program 1 times [2023-02-14 13:53:21,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:21,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481547892] [2023-02-14 13:53:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:21,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:21,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:21,249 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 13:53:21,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:21,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481547892] [2023-02-14 13:53:21,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481547892] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:21,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:21,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 13:53:21,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679841857] [2023-02-14 13:53:21,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:21,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 13:53:21,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 13:53:21,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:53:21,254 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:53:21,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:21,446 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2023-02-14 13:53:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:53:21,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-02-14 13:53:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:21,448 INFO L225 Difference]: With dead ends: 89 [2023-02-14 13:53:21,448 INFO L226 Difference]: Without dead ends: 89 [2023-02-14 13:53:21,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-14 13:53:21,459 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 15 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:21,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 316 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:53:21,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-14 13:53:21,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2023-02-14 13:53:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.74) internal successors, (87), 80 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:53:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2023-02-14 13:53:21,470 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 14 [2023-02-14 13:53:21,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:21,471 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2023-02-14 13:53:21,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:53:21,471 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2023-02-14 13:53:21,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 13:53:21,472 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:21,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:21,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 13:53:21,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:21,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:21,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1763306156, now seen corresponding path program 1 times [2023-02-14 13:53:21,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:21,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821156001] [2023-02-14 13:53:21,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:21,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:21,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 13:53:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:21,566 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 13:53:21,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:21,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821156001] [2023-02-14 13:53:21,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821156001] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:21,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:21,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 13:53:21,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437310709] [2023-02-14 13:53:21,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:21,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 13:53:21,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:21,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 13:53:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 13:53:21,571 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:53:21,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:21,655 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2023-02-14 13:53:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 13:53:21,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-14 13:53:21,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:21,657 INFO L225 Difference]: With dead ends: 94 [2023-02-14 13:53:21,657 INFO L226 Difference]: Without dead ends: 94 [2023-02-14 13:53:21,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 13:53:21,658 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 9 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:21,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 211 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:21,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-14 13:53:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2023-02-14 13:53:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 81 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:53:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2023-02-14 13:53:21,663 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 16 [2023-02-14 13:53:21,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:21,664 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2023-02-14 13:53:21,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:53:21,664 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2023-02-14 13:53:21,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-14 13:53:21,665 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:21,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:21,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 13:53:21,665 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:21,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:21,666 INFO L85 PathProgramCache]: Analyzing trace with hash 958467140, now seen corresponding path program 1 times [2023-02-14 13:53:21,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:21,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829842229] [2023-02-14 13:53:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:21,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:21,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:21,733 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 13:53:21,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:21,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829842229] [2023-02-14 13:53:21,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829842229] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:21,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:21,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 13:53:21,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561967154] [2023-02-14 13:53:21,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:21,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 13:53:21,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:21,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 13:53:21,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 13:53:21,735 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:53:21,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:21,807 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2023-02-14 13:53:21,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 13:53:21,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-02-14 13:53:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:21,809 INFO L225 Difference]: With dead ends: 91 [2023-02-14 13:53:21,809 INFO L226 Difference]: Without dead ends: 91 [2023-02-14 13:53:21,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 13:53:21,810 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 1 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:21,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 207 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:21,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-14 13:53:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2023-02-14 13:53:21,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 85 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:21,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2023-02-14 13:53:21,815 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 17 [2023-02-14 13:53:21,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:21,816 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2023-02-14 13:53:21,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:53:21,816 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2023-02-14 13:53:21,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 13:53:21,817 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:21,817 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:21,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-14 13:53:21,818 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:21,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:21,818 INFO L85 PathProgramCache]: Analyzing trace with hash 239866037, now seen corresponding path program 1 times [2023-02-14 13:53:21,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:21,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361174582] [2023-02-14 13:53:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:21,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:21,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:21,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 13:53:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:53:21,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:21,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361174582] [2023-02-14 13:53:21,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361174582] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:21,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738018278] [2023-02-14 13:53:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:21,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:21,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:21,945 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 13:53:21,971 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 13:53:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:22,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 13:53:22,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:53:22,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:53:22,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738018278] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:53:22,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:53:22,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2023-02-14 13:53:22,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804805088] [2023-02-14 13:53:22,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:22,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 13:53:22,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:22,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 13:53:22,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:53:22,177 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 13:53:22,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:22,253 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2023-02-14 13:53:22,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:53:22,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2023-02-14 13:53:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:22,254 INFO L225 Difference]: With dead ends: 92 [2023-02-14 13:53:22,254 INFO L226 Difference]: Without dead ends: 92 [2023-02-14 13:53:22,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:53:22,255 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 9 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:22,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 218 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-14 13:53:22,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-02-14 13:53:22,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 87 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:22,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2023-02-14 13:53:22,260 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 31 [2023-02-14 13:53:22,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:22,261 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2023-02-14 13:53:22,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 13:53:22,261 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2023-02-14 13:53:22,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 13:53:22,262 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:22,262 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:22,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 13:53:22,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:22,469 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:22,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:22,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1367704317, now seen corresponding path program 1 times [2023-02-14 13:53:22,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:22,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880377774] [2023-02-14 13:53:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:22,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:22,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:22,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:53:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:53:22,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:22,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880377774] [2023-02-14 13:53:22,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880377774] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:22,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804135181] [2023-02-14 13:53:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:22,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:22,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:22,893 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 13:53:22,918 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 13:53:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:23,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 13:53:23,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:23,065 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 13:53:23,172 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_510 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_510))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-14 13:53:23,274 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:53:23,275 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 17 treesize of output 21 [2023-02-14 13:53:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-02-14 13:53:23,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:23,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804135181] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:23,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:23,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2023-02-14 13:53:23,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151502521] [2023-02-14 13:53:23,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:23,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 13:53:23,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:23,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 13:53:23,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2023-02-14 13:53:23,361 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:53:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:23,706 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2023-02-14 13:53:23,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:53:23,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-02-14 13:53:23,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:23,707 INFO L225 Difference]: With dead ends: 103 [2023-02-14 13:53:23,708 INFO L226 Difference]: Without dead ends: 103 [2023-02-14 13:53:23,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=191, Unknown=1, NotChecked=28, Total=272 [2023-02-14 13:53:23,709 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 142 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:23,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 275 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 359 Invalid, 0 Unknown, 91 Unchecked, 0.3s Time] [2023-02-14 13:53:23,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-14 13:53:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2023-02-14 13:53:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 57 states have (on average 1.631578947368421) internal successors, (93), 86 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2023-02-14 13:53:23,722 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 32 [2023-02-14 13:53:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:23,723 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2023-02-14 13:53:23,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:53:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2023-02-14 13:53:23,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 13:53:23,726 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:23,726 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:23,735 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 13:53:23,935 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,SelfDestructingSolverStorable7 [2023-02-14 13:53:23,936 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:23,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:23,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1367704316, now seen corresponding path program 1 times [2023-02-14 13:53:23,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:23,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372966346] [2023-02-14 13:53:23,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:23,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:24,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:24,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:53:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:53:24,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:24,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372966346] [2023-02-14 13:53:24,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372966346] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:24,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053850805] [2023-02-14 13:53:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:24,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:24,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:24,497 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 13:53:24,500 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 13:53:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:24,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-14 13:53:24,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:24,644 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 13:53:24,868 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-02-14 13:53:24,869 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 1 case distinctions, treesize of input 14 treesize of output 13 [2023-02-14 13:53:24,883 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:53:24,884 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 11 [2023-02-14 13:53:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:53:24,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:27,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053850805] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:27,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:27,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2023-02-14 13:53:27,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94076011] [2023-02-14 13:53:27,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:27,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 13:53:27,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:27,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 13:53:27,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-02-14 13:53:27,061 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 13:53:27,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:27,630 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2023-02-14 13:53:27,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 13:53:27,631 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-02-14 13:53:27,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:27,632 INFO L225 Difference]: With dead ends: 91 [2023-02-14 13:53:27,632 INFO L226 Difference]: Without dead ends: 91 [2023-02-14 13:53:27,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2023-02-14 13:53:27,633 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 81 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:27,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 515 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 13:53:27,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-14 13:53:27,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2023-02-14 13:53:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.6140350877192982) internal successors, (92), 85 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2023-02-14 13:53:27,636 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 32 [2023-02-14 13:53:27,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:27,636 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2023-02-14 13:53:27,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 13:53:27,636 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2023-02-14 13:53:27,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 13:53:27,637 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:27,637 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:27,649 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 13:53:27,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:27,841 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:27,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1122646220, now seen corresponding path program 2 times [2023-02-14 13:53:27,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:27,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549642773] [2023-02-14 13:53:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:27,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:27,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:27,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:53:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:27,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 13:53:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 13:53:28,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:28,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549642773] [2023-02-14 13:53:28,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549642773] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:28,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601981634] [2023-02-14 13:53:28,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:53:28,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:28,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:28,008 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 13:53:28,014 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 13:53:28,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:53:28,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:53:28,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 13:53:28,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:53:28,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 13:53:28,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601981634] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:53:28,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:53:28,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2023-02-14 13:53:28,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810897855] [2023-02-14 13:53:28,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:28,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 13:53:28,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:28,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 13:53:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-14 13:53:28,262 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 13:53:28,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:28,413 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2023-02-14 13:53:28,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:53:28,414 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2023-02-14 13:53:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:28,415 INFO L225 Difference]: With dead ends: 90 [2023-02-14 13:53:28,415 INFO L226 Difference]: Without dead ends: 90 [2023-02-14 13:53:28,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-14 13:53:28,416 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 144 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:28,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 355 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:28,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-14 13:53:28,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-02-14 13:53:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 85 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:28,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2023-02-14 13:53:28,419 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 46 [2023-02-14 13:53:28,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:28,419 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2023-02-14 13:53:28,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 13:53:28,419 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2023-02-14 13:53:28,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 13:53:28,420 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:28,420 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:28,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 13:53:28,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:28,621 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:28,621 INFO L85 PathProgramCache]: Analyzing trace with hash 186649324, now seen corresponding path program 1 times [2023-02-14 13:53:28,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:28,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215699192] [2023-02-14 13:53:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:28,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:28,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:29,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:53:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:29,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:53:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 13:53:29,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:29,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215699192] [2023-02-14 13:53:29,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215699192] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:29,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841567514] [2023-02-14 13:53:29,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:29,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:29,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:29,121 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 13:53:29,152 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 13:53:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:29,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-14 13:53:29,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:29,320 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 13:53:29,334 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 13:53:29,350 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1168 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_1168)))) is different from true [2023-02-14 13:53:29,373 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_#res#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1168 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_1168)))) is different from true [2023-02-14 13:53:29,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:29,391 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 12 treesize of output 14 [2023-02-14 13:53:29,470 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-02-14 13:53:29,504 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:53:29,505 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 1 case distinctions, treesize of input 12 treesize of output 14 [2023-02-14 13:53:29,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:29,680 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2023-02-14 13:53:29,681 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2023-02-14 13:53:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 14 not checked. [2023-02-14 13:53:29,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:29,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841567514] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:29,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:29,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2023-02-14 13:53:29,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553182435] [2023-02-14 13:53:29,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:29,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 13:53:29,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:29,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 13:53:29,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=280, Unknown=3, NotChecked=108, Total=462 [2023-02-14 13:53:29,904 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 16 states have internal predecessors, (64), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:53:30,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:30,391 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2023-02-14 13:53:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 13:53:30,392 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 16 states have internal predecessors, (64), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 47 [2023-02-14 13:53:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:30,393 INFO L225 Difference]: With dead ends: 97 [2023-02-14 13:53:30,393 INFO L226 Difference]: Without dead ends: 97 [2023-02-14 13:53:30,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=563, Unknown=3, NotChecked=156, Total=870 [2023-02-14 13:53:30,394 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 310 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:30,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 242 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 394 Invalid, 0 Unknown, 298 Unchecked, 0.3s Time] [2023-02-14 13:53:30,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-14 13:53:30,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2023-02-14 13:53:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 80 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2023-02-14 13:53:30,396 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 47 [2023-02-14 13:53:30,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:30,396 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2023-02-14 13:53:30,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 16 states have internal predecessors, (64), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:53:30,397 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2023-02-14 13:53:30,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 13:53:30,397 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:30,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:30,407 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 13:53:30,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 13:53:30,604 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:30,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:30,605 INFO L85 PathProgramCache]: Analyzing trace with hash 186649325, now seen corresponding path program 1 times [2023-02-14 13:53:30,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:30,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903155788] [2023-02-14 13:53:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:30,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:30,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:31,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:53:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:31,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:53:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 13:53:31,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:31,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903155788] [2023-02-14 13:53:31,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903155788] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:31,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257721030] [2023-02-14 13:53:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:31,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:31,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:31,161 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 13:53:31,188 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 13:53:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:31,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 13:53:31,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:31,367 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 13:53:31,393 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 13:53:31,408 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1418 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1418) |c_#length|)))) is different from true [2023-02-14 13:53:31,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:31,448 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 12 treesize of output 14 [2023-02-14 13:53:31,506 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 13:53:31,515 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1419 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1419) |c_#length|)))) is different from true [2023-02-14 13:53:31,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:31,557 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 12 treesize of output 14 [2023-02-14 13:53:31,621 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 13:53:31,627 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1420 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1420) |c_#length|)))) is different from true [2023-02-14 13:53:31,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:31,664 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 12 treesize of output 14 [2023-02-14 13:53:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 21 not checked. [2023-02-14 13:53:31,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:33,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257721030] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:33,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:33,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-02-14 13:53:33,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473834603] [2023-02-14 13:53:33,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:33,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 13:53:33,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:33,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 13:53:33,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=167, Unknown=3, NotChecked=84, Total=306 [2023-02-14 13:53:33,047 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-14 13:53:33,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:33,323 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2023-02-14 13:53:33,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:53:33,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2023-02-14 13:53:33,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:33,324 INFO L225 Difference]: With dead ends: 92 [2023-02-14 13:53:33,324 INFO L226 Difference]: Without dead ends: 92 [2023-02-14 13:53:33,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=74, Invalid=207, Unknown=3, NotChecked=96, Total=380 [2023-02-14 13:53:33,325 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 202 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:33,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 218 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 293 Invalid, 0 Unknown, 264 Unchecked, 0.2s Time] [2023-02-14 13:53:33,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-14 13:53:33,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2023-02-14 13:53:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 75 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2023-02-14 13:53:33,328 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 47 [2023-02-14 13:53:33,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:33,328 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2023-02-14 13:53:33,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-14 13:53:33,329 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2023-02-14 13:53:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 13:53:33,329 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:33,329 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:33,340 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 13:53:33,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:33,530 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:33,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:33,531 INFO L85 PathProgramCache]: Analyzing trace with hash 353447346, now seen corresponding path program 1 times [2023-02-14 13:53:33,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:33,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576574033] [2023-02-14 13:53:33,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:33,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:33,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:33,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:53:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:33,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:53:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:53:34,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:34,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576574033] [2023-02-14 13:53:34,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576574033] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:34,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56422013] [2023-02-14 13:53:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:34,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:34,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:34,301 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 13:53:34,321 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 13:53:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:34,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-14 13:53:34,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:34,576 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 13:53:34,781 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 9 treesize of output 5 [2023-02-14 13:53:34,909 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_1672 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1672)))) is different from true [2023-02-14 13:53:34,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:34,938 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 16 treesize of output 18 [2023-02-14 13:53:34,952 INFO L321 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-02-14 13:53:34,953 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 23 treesize of output 24 [2023-02-14 13:53:34,985 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 17 treesize of output 9 [2023-02-14 13:53:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-02-14 13:53:34,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:35,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56422013] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:35,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:35,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2023-02-14 13:53:35,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165130939] [2023-02-14 13:53:35,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:35,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 13:53:35,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:35,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 13:53:35,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=572, Unknown=1, NotChecked=48, Total=702 [2023-02-14 13:53:35,083 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 26 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:53:35,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:35,830 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2023-02-14 13:53:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 13:53:35,831 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2023-02-14 13:53:35,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:35,831 INFO L225 Difference]: With dead ends: 121 [2023-02-14 13:53:35,831 INFO L226 Difference]: Without dead ends: 121 [2023-02-14 13:53:35,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=199, Invalid=1064, Unknown=1, NotChecked=68, Total=1332 [2023-02-14 13:53:35,833 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 344 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:35,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 520 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 765 Invalid, 0 Unknown, 113 Unchecked, 0.5s Time] [2023-02-14 13:53:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-14 13:53:35,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 79. [2023-02-14 13:53:35,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.396551724137931) internal successors, (81), 74 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2023-02-14 13:53:35,836 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 51 [2023-02-14 13:53:35,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:35,836 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2023-02-14 13:53:35,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:53:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2023-02-14 13:53:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 13:53:35,837 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:35,838 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:35,847 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 13:53:36,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:36,045 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:36,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:36,045 INFO L85 PathProgramCache]: Analyzing trace with hash 353447347, now seen corresponding path program 1 times [2023-02-14 13:53:36,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:36,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187951128] [2023-02-14 13:53:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:36,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:36,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:36,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:53:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:36,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:53:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 13:53:37,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:37,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187951128] [2023-02-14 13:53:37,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187951128] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:37,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219845005] [2023-02-14 13:53:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:37,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:37,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:37,397 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 13:53:37,400 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 13:53:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:37,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-14 13:53:37,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:37,674 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 13:53:38,069 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 13:53:38,074 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 19 treesize of output 11 [2023-02-14 13:53:38,299 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1926 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1926) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1931 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1931))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_1932 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1932) |c_#memory_$Pointer$.offset|)))) is different from true [2023-02-14 13:53:38,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:38,337 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 31 treesize of output 31 [2023-02-14 13:53:38,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:38,344 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 22 treesize of output 24 [2023-02-14 13:53:38,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:38,350 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 29 treesize of output 29 [2023-02-14 13:53:38,364 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 13:53:38,364 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 13:53:38,430 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 23 treesize of output 15 [2023-02-14 13:53:38,433 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 26 treesize of output 14 [2023-02-14 13:53:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-02-14 13:53:38,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:38,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219845005] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:38,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:38,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2023-02-14 13:53:38,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884875914] [2023-02-14 13:53:38,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:38,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-14 13:53:38,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:38,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-14 13:53:38,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1296, Unknown=2, NotChecked=72, Total=1482 [2023-02-14 13:53:38,807 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 35 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:53:40,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:40,717 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2023-02-14 13:53:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 13:53:40,717 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2023-02-14 13:53:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:40,718 INFO L225 Difference]: With dead ends: 117 [2023-02-14 13:53:40,719 INFO L226 Difference]: Without dead ends: 117 [2023-02-14 13:53:40,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=292, Invalid=2569, Unknown=5, NotChecked=104, Total=2970 [2023-02-14 13:53:40,720 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 532 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:40,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1026 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1269 Invalid, 3 Unknown, 87 Unchecked, 1.0s Time] [2023-02-14 13:53:40,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-14 13:53:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 82. [2023-02-14 13:53:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 77 states have internal predecessors, (84), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:40,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2023-02-14 13:53:40,726 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 51 [2023-02-14 13:53:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:40,726 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2023-02-14 13:53:40,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:53:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2023-02-14 13:53:40,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 13:53:40,728 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:40,729 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:40,739 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 13:53:40,935 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,SelfDestructingSolverStorable13 [2023-02-14 13:53:40,936 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:40,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:40,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1709893007, now seen corresponding path program 1 times [2023-02-14 13:53:40,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:40,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051993035] [2023-02-14 13:53:40,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:40,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:53:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:53:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-14 13:53:41,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:41,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051993035] [2023-02-14 13:53:41,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051993035] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:41,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:41,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 13:53:41,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193328841] [2023-02-14 13:53:41,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:41,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 13:53:41,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:41,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 13:53:41,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:53:41,115 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 13:53:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:41,239 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2023-02-14 13:53:41,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:53:41,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2023-02-14 13:53:41,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:41,246 INFO L225 Difference]: With dead ends: 93 [2023-02-14 13:53:41,246 INFO L226 Difference]: Without dead ends: 93 [2023-02-14 13:53:41,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-14 13:53:41,246 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 44 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:41,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 219 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-14 13:53:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2023-02-14 13:53:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.360655737704918) internal successors, (83), 76 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:41,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2023-02-14 13:53:41,249 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 54 [2023-02-14 13:53:41,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:41,250 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2023-02-14 13:53:41,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 13:53:41,250 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2023-02-14 13:53:41,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 13:53:41,250 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:41,250 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:41,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-14 13:53:41,251 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:41,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:41,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1709893006, now seen corresponding path program 1 times [2023-02-14 13:53:41,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:41,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262990443] [2023-02-14 13:53:41,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:41,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:53:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:53:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-14 13:53:41,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:41,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262990443] [2023-02-14 13:53:41,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262990443] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:41,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:41,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 13:53:41,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263635661] [2023-02-14 13:53:41,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:41,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 13:53:41,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:41,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 13:53:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:53:41,521 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 13:53:41,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:41,658 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2023-02-14 13:53:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:53:41,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2023-02-14 13:53:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:41,659 INFO L225 Difference]: With dead ends: 80 [2023-02-14 13:53:41,659 INFO L226 Difference]: Without dead ends: 80 [2023-02-14 13:53:41,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-14 13:53:41,660 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 45 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:41,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 218 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:41,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-14 13:53:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-02-14 13:53:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 75 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2023-02-14 13:53:41,662 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 54 [2023-02-14 13:53:41,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:41,662 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2023-02-14 13:53:41,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 13:53:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2023-02-14 13:53:41,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 13:53:41,663 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:41,663 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:41,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-14 13:53:41,663 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:41,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:41,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1969948792, now seen corresponding path program 1 times [2023-02-14 13:53:41,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:41,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527390276] [2023-02-14 13:53:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:41,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:53:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:53:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-14 13:53:41,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:41,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527390276] [2023-02-14 13:53:41,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527390276] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:41,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:41,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-14 13:53:41,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953889387] [2023-02-14 13:53:41,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:41,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 13:53:41,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:41,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 13:53:41,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-14 13:53:41,953 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:53:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:42,201 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2023-02-14 13:53:42,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 13:53:42,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-02-14 13:53:42,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:42,203 INFO L225 Difference]: With dead ends: 141 [2023-02-14 13:53:42,203 INFO L226 Difference]: Without dead ends: 141 [2023-02-14 13:53:42,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-02-14 13:53:42,203 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 165 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:42,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 333 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:53:42,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-14 13:53:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 84. [2023-02-14 13:53:42,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 79 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:42,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2023-02-14 13:53:42,206 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 54 [2023-02-14 13:53:42,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:42,206 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2023-02-14 13:53:42,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:53:42,207 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2023-02-14 13:53:42,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 13:53:42,207 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:42,207 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:42,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-14 13:53:42,207 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:42,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1969948791, now seen corresponding path program 1 times [2023-02-14 13:53:42,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:42,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052979586] [2023-02-14 13:53:42,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:42,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:42,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:42,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:53:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:42,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:53:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-14 13:53:42,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:42,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052979586] [2023-02-14 13:53:42,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052979586] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:42,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:42,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-14 13:53:42,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177470674] [2023-02-14 13:53:42,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:42,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 13:53:42,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:42,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 13:53:42,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-14 13:53:42,691 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 11 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:53:42,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:42,945 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2023-02-14 13:53:42,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 13:53:42,945 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-02-14 13:53:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:42,946 INFO L225 Difference]: With dead ends: 131 [2023-02-14 13:53:42,946 INFO L226 Difference]: Without dead ends: 131 [2023-02-14 13:53:42,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-02-14 13:53:42,947 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 223 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:42,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 325 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:53:42,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-14 13:53:42,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 86. [2023-02-14 13:53:42,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 81 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:42,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2023-02-14 13:53:42,949 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 54 [2023-02-14 13:53:42,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:42,950 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2023-02-14 13:53:42,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:53:42,950 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2023-02-14 13:53:42,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-14 13:53:42,950 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:42,950 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:42,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-14 13:53:42,951 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:42,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1467023000, now seen corresponding path program 1 times [2023-02-14 13:53:42,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:42,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886883365] [2023-02-14 13:53:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:42,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:43,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:43,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:53:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:43,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:53:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:53:44,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:44,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886883365] [2023-02-14 13:53:44,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886883365] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:44,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790717254] [2023-02-14 13:53:44,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:44,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:44,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:44,897 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 13:53:44,900 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 13:53:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:45,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 94 conjunts are in the unsatisfiable core [2023-02-14 13:53:45,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:45,165 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 13:53:45,439 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:53:45,439 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 17 treesize of output 21 [2023-02-14 13:53:45,634 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 13 treesize of output 9 [2023-02-14 13:53:45,717 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:53:45,717 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 34 treesize of output 35 [2023-02-14 13:53:45,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:45,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:53:45,995 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 51 treesize of output 18 [2023-02-14 13:53:45,999 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 15 treesize of output 7 [2023-02-14 13:53:46,183 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_2833 (Array Int Int)) (v_ArrVal_2832 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2832)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2833) |c_#memory_$Pointer$.base|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-14 13:53:46,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:46,234 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:53:46,235 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 57 treesize of output 55 [2023-02-14 13:53:46,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:46,244 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 62 treesize of output 58 [2023-02-14 13:53:46,278 INFO L321 Elim1Store]: treesize reduction 94, result has 36.9 percent of original size [2023-02-14 13:53:46,279 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 64 [2023-02-14 13:53:46,377 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 63 treesize of output 43 [2023-02-14 13:53:46,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:46,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:53:46,556 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 56 treesize of output 21 [2023-02-14 13:53:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-02-14 13:53:46,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:46,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790717254] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:46,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:46,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 48 [2023-02-14 13:53:46,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695277864] [2023-02-14 13:53:46,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:46,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-14 13:53:46,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:46,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-14 13:53:46,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2448, Unknown=1, NotChecked=100, Total=2756 [2023-02-14 13:53:46,922 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 49 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 42 states have internal predecessors, (90), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:53:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:49,154 INFO L93 Difference]: Finished difference Result 133 states and 148 transitions. [2023-02-14 13:53:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 13:53:49,154 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 42 states have internal predecessors, (90), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 55 [2023-02-14 13:53:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:49,155 INFO L225 Difference]: With dead ends: 133 [2023-02-14 13:53:49,155 INFO L226 Difference]: Without dead ends: 133 [2023-02-14 13:53:49,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=496, Invalid=4063, Unknown=1, NotChecked=132, Total=4692 [2023-02-14 13:53:49,156 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 521 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:49,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 1106 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1561 Invalid, 0 Unknown, 125 Unchecked, 1.2s Time] [2023-02-14 13:53:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-14 13:53:49,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 88. [2023-02-14 13:53:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 83 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:49,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2023-02-14 13:53:49,160 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 55 [2023-02-14 13:53:49,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:49,160 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2023-02-14 13:53:49,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 42 states have internal predecessors, (90), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:53:49,160 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2023-02-14 13:53:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-14 13:53:49,161 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:49,161 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:49,170 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 13:53:49,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:49,367 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:49,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:49,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1467022999, now seen corresponding path program 1 times [2023-02-14 13:53:49,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:49,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536824246] [2023-02-14 13:53:49,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:49,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:50,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:50,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:53:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:51,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:53:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:53:51,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:51,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536824246] [2023-02-14 13:53:51,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536824246] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:51,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843549944] [2023-02-14 13:53:51,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:51,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:51,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:51,976 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 13:53:51,978 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 13:53:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:52,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 123 conjunts are in the unsatisfiable core [2023-02-14 13:53:52,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:52,270 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 13:53:52,611 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:53:52,611 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 17 treesize of output 21 [2023-02-14 13:53:52,749 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 13 treesize of output 9 [2023-02-14 13:53:52,756 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 13 treesize of output 9 [2023-02-14 13:53:52,860 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:53:52,860 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 65 treesize of output 62 [2023-02-14 13:53:52,865 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 41 treesize of output 41 [2023-02-14 13:53:53,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:53:53,239 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 73 treesize of output 36 [2023-02-14 13:53:53,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:53:53,248 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-02-14 13:53:53,503 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_3104 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_3104) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3105 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_3105) |c_#memory_$Pointer$.offset|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_3099 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_3099))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-14 13:53:53,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:53,556 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:53:53,557 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 79 treesize of output 67 [2023-02-14 13:53:53,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:53,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:53,572 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-14 13:53:53,573 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 1 case distinctions, treesize of input 48 treesize of output 47 [2023-02-14 13:53:53,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:53,583 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 30 treesize of output 32 [2023-02-14 13:53:53,600 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-14 13:53:53,600 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 13:53:53,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:53,881 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:53:53,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:53:53,884 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 85 treesize of output 45 [2023-02-14 13:53:53,895 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2023-02-14 13:53:53,896 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 39 treesize of output 25 [2023-02-14 13:53:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-02-14 13:53:53,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:54,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843549944] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:54,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:54,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 51 [2023-02-14 13:53:54,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557098104] [2023-02-14 13:53:54,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:54,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-14 13:53:54,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:54,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-14 13:53:54,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=3000, Unknown=3, NotChecked=110, Total=3306 [2023-02-14 13:53:54,406 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 52 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 45 states have internal predecessors, (95), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:53:58,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:58,304 INFO L93 Difference]: Finished difference Result 179 states and 198 transitions. [2023-02-14 13:53:58,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-14 13:53:58,305 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 45 states have internal predecessors, (95), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 55 [2023-02-14 13:53:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:58,305 INFO L225 Difference]: With dead ends: 179 [2023-02-14 13:53:58,305 INFO L226 Difference]: Without dead ends: 179 [2023-02-14 13:53:58,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=577, Invalid=5586, Unknown=3, NotChecked=154, Total=6320 [2023-02-14 13:53:58,307 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 772 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:58,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 1347 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2419 Invalid, 0 Unknown, 189 Unchecked, 1.6s Time] [2023-02-14 13:53:58,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-14 13:53:58,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 90. [2023-02-14 13:53:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 85 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2023-02-14 13:53:58,311 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 55 [2023-02-14 13:53:58,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:58,312 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2023-02-14 13:53:58,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 45 states have internal predecessors, (95), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:53:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2023-02-14 13:53:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-14 13:53:58,312 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:58,312 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:58,321 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 13:53:58,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:58,519 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:58,520 INFO L85 PathProgramCache]: Analyzing trace with hash -938871693, now seen corresponding path program 1 times [2023-02-14 13:53:58,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:58,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708792145] [2023-02-14 13:53:58,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:58,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:58,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:58,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:53:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:58,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:53:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-14 13:53:58,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:58,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708792145] [2023-02-14 13:53:58,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708792145] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:58,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:58,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-14 13:53:58,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011329836] [2023-02-14 13:53:58,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:58,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 13:53:58,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:58,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 13:53:58,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-14 13:53:58,768 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 11 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:53:58,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:58,951 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2023-02-14 13:53:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 13:53:58,951 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2023-02-14 13:53:58,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:58,952 INFO L225 Difference]: With dead ends: 118 [2023-02-14 13:53:58,952 INFO L226 Difference]: Without dead ends: 118 [2023-02-14 13:53:58,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-02-14 13:53:58,953 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 99 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:58,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 531 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:58,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-14 13:53:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2023-02-14 13:53:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 85 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:53:58,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2023-02-14 13:53:58,956 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 55 [2023-02-14 13:53:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:58,956 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2023-02-14 13:53:58,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:53:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2023-02-14 13:53:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-14 13:53:58,957 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:58,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:58,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-14 13:53:58,957 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:53:58,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:58,957 INFO L85 PathProgramCache]: Analyzing trace with hash 959790642, now seen corresponding path program 1 times [2023-02-14 13:53:58,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:58,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439234112] [2023-02-14 13:53:58,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:58,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:59,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:53:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:59,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:53:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:59,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:53:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 13:53:59,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:59,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439234112] [2023-02-14 13:53:59,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439234112] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:59,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874202500] [2023-02-14 13:53:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:59,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:59,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:59,439 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 13:53:59,442 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 13:53:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:59,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-14 13:53:59,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:59,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:54:00,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:54:00,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:00,061 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 18 treesize of output 20 [2023-02-14 13:54:00,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:54:00,118 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 28 treesize of output 16 [2023-02-14 13:54:00,121 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 15 treesize of output 7 [2023-02-14 13:54:00,188 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 15 treesize of output 7 [2023-02-14 13:54:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-14 13:54:00,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:54:00,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874202500] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:54:00,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:54:00,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 27 [2023-02-14 13:54:00,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669972783] [2023-02-14 13:54:00,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:54:00,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 13:54:00,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:54:00,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 13:54:00,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2023-02-14 13:54:00,216 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:54:00,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:54:00,670 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2023-02-14 13:54:00,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 13:54:00,672 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2023-02-14 13:54:00,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:54:00,672 INFO L225 Difference]: With dead ends: 116 [2023-02-14 13:54:00,672 INFO L226 Difference]: Without dead ends: 116 [2023-02-14 13:54:00,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 13:54:00,673 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 201 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:54:00,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 566 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:54:00,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-14 13:54:00,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 90. [2023-02-14 13:54:00,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 85 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:54:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2023-02-14 13:54:00,676 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 56 [2023-02-14 13:54:00,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:54:00,676 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2023-02-14 13:54:00,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:54:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2023-02-14 13:54:00,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-14 13:54:00,677 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:54:00,677 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:54:00,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 13:54:00,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-14 13:54:00,881 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:54:00,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:54:00,881 INFO L85 PathProgramCache]: Analyzing trace with hash -588248546, now seen corresponding path program 2 times [2023-02-14 13:54:00,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:54:00,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337219339] [2023-02-14 13:54:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:54:00,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:54:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:02,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:54:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:02,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:54:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:03,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:54:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:54:04,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:54:04,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337219339] [2023-02-14 13:54:04,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337219339] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:54:04,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100892418] [2023-02-14 13:54:04,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:54:04,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:54:04,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:54:04,358 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:54:04,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 13:54:04,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:54:04,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:54:04,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 141 conjunts are in the unsatisfiable core [2023-02-14 13:54:04,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:54:04,707 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 13:54:04,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:54:04,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:54:05,378 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:54:05,378 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 14 treesize of output 20 [2023-02-14 13:54:05,390 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:54:05,391 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 11 [2023-02-14 13:54:05,396 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 14 treesize of output 16 [2023-02-14 13:54:05,518 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 14 treesize of output 16 [2023-02-14 13:54:05,525 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 14 treesize of output 16 [2023-02-14 13:54:05,591 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 21 treesize of output 20 [2023-02-14 13:54:05,601 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 21 treesize of output 20 [2023-02-14 13:54:05,717 INFO L321 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2023-02-14 13:54:05,718 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 94 treesize of output 57 [2023-02-14 13:54:05,729 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 46 treesize of output 42 [2023-02-14 13:54:06,074 INFO L321 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2023-02-14 13:54:06,074 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 44 [2023-02-14 13:54:06,086 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-02-14 13:54:06,087 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 21 treesize of output 21 [2023-02-14 13:54:06,092 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 13:54:06,277 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_3809 (Array Int Int)) (v_ArrVal_3810 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_3810) |c_#memory_$Pointer$.offset|) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_3809) |c_#memory_$Pointer$.base|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-14 13:54:06,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:06,336 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-14 13:54:06,337 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 106 [2023-02-14 13:54:06,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:06,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:06,358 INFO L321 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2023-02-14 13:54:06,358 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 4 case distinctions, treesize of input 107 treesize of output 110 [2023-02-14 13:54:06,382 INFO L321 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2023-02-14 13:54:06,382 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 34 treesize of output 36 [2023-02-14 13:54:06,991 INFO L321 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2023-02-14 13:54:06,991 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 6 case distinctions, treesize of input 156 treesize of output 74 [2023-02-14 13:54:07,007 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2023-02-14 13:54:07,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 32 [2023-02-14 13:54:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2023-02-14 13:54:07,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:54:07,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100892418] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:54:07,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:54:07,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30] total 56 [2023-02-14 13:54:07,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985900061] [2023-02-14 13:54:07,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:54:07,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-14 13:54:07,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:54:07,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-14 13:54:07,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3492, Unknown=2, NotChecked=118, Total=3782 [2023-02-14 13:54:07,646 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 56 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 50 states have internal predecessors, (98), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:54:11,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:54:11,272 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2023-02-14 13:54:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 13:54:11,273 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 50 states have internal predecessors, (98), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 59 [2023-02-14 13:54:11,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:54:11,273 INFO L225 Difference]: With dead ends: 116 [2023-02-14 13:54:11,273 INFO L226 Difference]: Without dead ends: 116 [2023-02-14 13:54:11,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=371, Invalid=6437, Unknown=2, NotChecked=162, Total=6972 [2023-02-14 13:54:11,275 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 60 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-14 13:54:11,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1513 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2082 Invalid, 0 Unknown, 102 Unchecked, 1.6s Time] [2023-02-14 13:54:11,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-14 13:54:11,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2023-02-14 13:54:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 92 states have (on average 1.2608695652173914) internal successors, (116), 105 states have internal predecessors, (116), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:54:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2023-02-14 13:54:11,279 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 59 [2023-02-14 13:54:11,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:54:11,280 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2023-02-14 13:54:11,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 50 states have internal predecessors, (98), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:54:11,280 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2023-02-14 13:54:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-14 13:54:11,281 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:54:11,281 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:54:11,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 13:54:11,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-14 13:54:11,488 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:54:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:54:11,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1935094492, now seen corresponding path program 1 times [2023-02-14 13:54:11,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:54:11,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983735079] [2023-02-14 13:54:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:54:11,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:54:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:12,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:54:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:12,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:54:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:12,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:54:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 13:54:12,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:54:12,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983735079] [2023-02-14 13:54:12,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983735079] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:54:12,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:54:12,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-02-14 13:54:12,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654881228] [2023-02-14 13:54:12,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:54:12,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 13:54:12,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:54:12,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 13:54:12,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2023-02-14 13:54:12,258 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:54:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:54:13,105 INFO L93 Difference]: Finished difference Result 176 states and 195 transitions. [2023-02-14 13:54:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 13:54:13,105 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2023-02-14 13:54:13,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:54:13,106 INFO L225 Difference]: With dead ends: 176 [2023-02-14 13:54:13,106 INFO L226 Difference]: Without dead ends: 176 [2023-02-14 13:54:13,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2023-02-14 13:54:13,107 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 612 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:54:13,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 502 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 13:54:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-02-14 13:54:13,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 119. [2023-02-14 13:54:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 112 states have internal predecessors, (125), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:54:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2023-02-14 13:54:13,111 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 59 [2023-02-14 13:54:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:54:13,112 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2023-02-14 13:54:13,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:54:13,112 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2023-02-14 13:54:13,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-14 13:54:13,113 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:54:13,113 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:54:13,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-14 13:54:13,113 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:54:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:54:13,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1935094491, now seen corresponding path program 1 times [2023-02-14 13:54:13,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:54:13,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070508524] [2023-02-14 13:54:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:54:13,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:54:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:13,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:54:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:13,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:54:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:14,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:54:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 13:54:14,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:54:14,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070508524] [2023-02-14 13:54:14,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070508524] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:54:14,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124631387] [2023-02-14 13:54:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:54:14,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:54:14,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:54:14,689 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:54:14,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 13:54:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:14,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-14 13:54:14,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:54:14,976 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 13:54:15,391 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 27 treesize of output 15 [2023-02-14 13:54:15,399 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 7 treesize of output 3 [2023-02-14 13:54:15,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:15,640 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 16 treesize of output 11 [2023-02-14 13:54:15,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:15,649 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 35 treesize of output 26 [2023-02-14 13:54:15,662 INFO L321 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-02-14 13:54:15,662 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 1 case distinctions, treesize of input 18 treesize of output 21 [2023-02-14 13:54:15,675 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 13:54:15,675 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 13:54:15,933 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2023-02-14 13:54:15,934 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 21 treesize of output 20 [2023-02-14 13:54:15,951 INFO L321 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2023-02-14 13:54:15,951 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 44 [2023-02-14 13:54:15,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:15,971 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 14 treesize of output 16 [2023-02-14 13:54:15,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:15,976 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 32 treesize of output 30 [2023-02-14 13:54:16,091 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 33 treesize of output 17 [2023-02-14 13:54:16,097 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 15 treesize of output 7 [2023-02-14 13:54:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:54:16,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:54:21,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124631387] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:54:21,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:54:21,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2023-02-14 13:54:21,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44907799] [2023-02-14 13:54:21,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:54:21,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-14 13:54:21,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:54:21,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-14 13:54:21,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2197, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 13:54:21,546 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand has 40 states, 37 states have (on average 2.324324324324324) internal successors, (86), 34 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-14 13:54:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:54:24,884 INFO L93 Difference]: Finished difference Result 206 states and 228 transitions. [2023-02-14 13:54:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 13:54:24,885 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 2.324324324324324) internal successors, (86), 34 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 59 [2023-02-14 13:54:24,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:54:24,886 INFO L225 Difference]: With dead ends: 206 [2023-02-14 13:54:24,886 INFO L226 Difference]: Without dead ends: 206 [2023-02-14 13:54:24,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=480, Invalid=4490, Unknown=0, NotChecked=0, Total=4970 [2023-02-14 13:54:24,887 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 714 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 2107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:54:24,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 1289 Invalid, 2107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2076 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-14 13:54:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-02-14 13:54:24,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 122. [2023-02-14 13:54:24,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 115 states have internal predecessors, (128), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:54:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 138 transitions. [2023-02-14 13:54:24,892 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 138 transitions. Word has length 59 [2023-02-14 13:54:24,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:54:24,892 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 138 transitions. [2023-02-14 13:54:24,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 2.324324324324324) internal successors, (86), 34 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-14 13:54:24,893 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 138 transitions. [2023-02-14 13:54:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-14 13:54:24,893 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:54:24,894 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:54:24,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 13:54:25,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-14 13:54:25,102 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:54:25,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:54:25,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1526484642, now seen corresponding path program 1 times [2023-02-14 13:54:25,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:54:25,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513872180] [2023-02-14 13:54:25,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:54:25,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:54:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:25,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:54:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:25,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:54:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:25,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:54:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:54:25,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:54:25,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513872180] [2023-02-14 13:54:25,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513872180] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:54:25,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229539437] [2023-02-14 13:54:25,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:54:25,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:54:25,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:54:25,577 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:54:25,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 13:54:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:25,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-14 13:54:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:54:26,152 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 13:54:26,217 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_4538 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_4538)))) is different from true [2023-02-14 13:54:26,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:26,232 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 15 treesize of output 17 [2023-02-14 13:54:26,255 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 13:54:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 3 not checked. [2023-02-14 13:54:26,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:54:26,326 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4543 (Array Int Int)) (|v_node_create_~temp~0#1.base_66| Int)) (or (not (< |v_node_create_~temp~0#1.base_66| |c_#StackHeapBarrier|)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_66| v_ArrVal_4543) |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 0)))) is different from false [2023-02-14 13:54:26,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229539437] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:54:26,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:54:26,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2023-02-14 13:54:26,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788910728] [2023-02-14 13:54:26,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:54:26,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 13:54:26,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:54:26,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 13:54:26,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=571, Unknown=2, NotChecked=98, Total=756 [2023-02-14 13:54:26,331 INFO L87 Difference]: Start difference. First operand 122 states and 138 transitions. Second operand has 26 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 22 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:54:26,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:54:26,812 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2023-02-14 13:54:26,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 13:54:26,813 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 22 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 59 [2023-02-14 13:54:26,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:54:26,814 INFO L225 Difference]: With dead ends: 115 [2023-02-14 13:54:26,814 INFO L226 Difference]: Without dead ends: 115 [2023-02-14 13:54:26,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=956, Unknown=2, NotChecked=130, Total=1260 [2023-02-14 13:54:26,815 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 398 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 13:54:26,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 534 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 510 Invalid, 0 Unknown, 76 Unchecked, 0.3s Time] [2023-02-14 13:54:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-14 13:54:26,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-02-14 13:54:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 95 states have (on average 1.2526315789473683) internal successors, (119), 108 states have internal predecessors, (119), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:54:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2023-02-14 13:54:26,819 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 59 [2023-02-14 13:54:26,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:54:26,819 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2023-02-14 13:54:26,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 22 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:54:26,820 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2023-02-14 13:54:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-14 13:54:26,820 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:54:26,821 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:54:26,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 13:54:27,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:54:27,030 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:54:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:54:27,031 INFO L85 PathProgramCache]: Analyzing trace with hash 95034574, now seen corresponding path program 1 times [2023-02-14 13:54:27,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:54:27,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835081709] [2023-02-14 13:54:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:54:27,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:54:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:28,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:54:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:28,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:54:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:28,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:54:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:54:30,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:54:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835081709] [2023-02-14 13:54:30,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835081709] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:54:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856156436] [2023-02-14 13:54:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:54:30,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:54:30,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:54:30,213 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:54:30,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 13:54:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:30,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 90 conjunts are in the unsatisfiable core [2023-02-14 13:54:30,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:54:30,552 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 13:54:30,981 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:54:30,981 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-14 13:54:31,117 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 13 treesize of output 9 [2023-02-14 13:54:31,199 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:54:31,199 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 44 treesize of output 43 [2023-02-14 13:54:31,493 INFO L321 Elim1Store]: treesize reduction 3, result has 83.3 percent of original size [2023-02-14 13:54:31,493 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 37 [2023-02-14 13:54:31,502 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 15 treesize of output 11 [2023-02-14 13:54:31,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:54:31,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:31,978 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:54:31,978 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 75 treesize of output 67 [2023-02-14 13:54:31,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:31,983 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 66 treesize of output 64 [2023-02-14 13:54:32,002 INFO L321 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2023-02-14 13:54:32,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2023-02-14 13:54:32,204 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 66 treesize of output 50 [2023-02-14 13:54:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:54:32,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:54:32,800 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| Int) (v_ArrVal_4833 (Array Int Int)) (v_ArrVal_4834 (Array Int Int))) (or (not (< |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| |c_#StackHeapBarrier|)) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_4833))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (+ (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_4834) |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4)) 0)) (not (= (select |c_#valid| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35|) 0)))) is different from false [2023-02-14 13:54:32,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856156436] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:54:32,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:54:32,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27] total 56 [2023-02-14 13:54:32,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139568778] [2023-02-14 13:54:32,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:54:32,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-14 13:54:32,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:54:32,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-14 13:54:32,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3371, Unknown=5, NotChecked=116, Total=3660 [2023-02-14 13:54:32,803 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 56 states, 54 states have (on average 2.0) internal successors, (108), 47 states have internal predecessors, (108), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:54:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:54:37,715 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2023-02-14 13:54:37,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 13:54:37,716 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 2.0) internal successors, (108), 47 states have internal predecessors, (108), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 61 [2023-02-14 13:54:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:54:37,716 INFO L225 Difference]: With dead ends: 120 [2023-02-14 13:54:37,716 INFO L226 Difference]: Without dead ends: 120 [2023-02-14 13:54:37,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=583, Invalid=6222, Unknown=5, NotChecked=162, Total=6972 [2023-02-14 13:54:37,718 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 469 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-14 13:54:37,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 1148 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2231 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-14 13:54:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-14 13:54:37,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2023-02-14 13:54:37,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 88 states have (on average 1.25) internal successors, (110), 101 states have internal predecessors, (110), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:54:37,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 120 transitions. [2023-02-14 13:54:37,722 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 120 transitions. Word has length 61 [2023-02-14 13:54:37,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:54:37,722 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 120 transitions. [2023-02-14 13:54:37,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 2.0) internal successors, (108), 47 states have internal predecessors, (108), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:54:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 120 transitions. [2023-02-14 13:54:37,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-14 13:54:37,723 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:54:37,723 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:54:37,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 13:54:37,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-14 13:54:37,929 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:54:37,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:54:37,930 INFO L85 PathProgramCache]: Analyzing trace with hash 592087770, now seen corresponding path program 1 times [2023-02-14 13:54:37,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:54:37,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446422247] [2023-02-14 13:54:37,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:54:37,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:54:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:38,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:54:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:38,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:54:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:38,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:54:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 13:54:38,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:54:38,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446422247] [2023-02-14 13:54:38,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446422247] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:54:38,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34688009] [2023-02-14 13:54:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:54:38,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:54:38,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:54:38,829 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:54:38,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 13:54:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:39,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-14 13:54:39,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:54:39,216 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 13:54:39,503 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 18 treesize of output 10 [2023-02-14 13:54:39,591 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_5105 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_5105))) (exists ((v_ArrVal_5104 Int)) (= (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_5104) |c_#valid|))) is different from true [2023-02-14 13:54:39,598 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_5106 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_5106))) (exists ((v_ArrVal_5104 Int)) (= (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_5104) |c_#valid|))) is different from true [2023-02-14 13:54:39,603 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_5104 Int)) (= (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_5104) |c_#valid|)) (exists ((v_ArrVal_5107 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_5107)))) is different from true [2023-02-14 13:54:39,609 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_#res#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_5107 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_#res#1.base| v_ArrVal_5107) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_5104 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_5104)))) is different from true [2023-02-14 13:54:39,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:39,624 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 24 [2023-02-14 13:54:39,636 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-14 13:54:39,636 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 1 case distinctions, treesize of input 16 treesize of output 26 [2023-02-14 13:54:40,035 INFO L321 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2023-02-14 13:54:40,035 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 40 [2023-02-14 13:54:40,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:40,056 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 24 [2023-02-14 13:54:40,116 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 13 [2023-02-14 13:54:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 5 not checked. [2023-02-14 13:54:40,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:54:40,793 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5110 (Array Int Int)) (|v_ULTIMATE.start_dll_append_#t~ret7#1.base_38| Int) (v_ArrVal_5108 Int) (|ULTIMATE.start_dll_append_~last~0#1.offset| Int) (|ULTIMATE.start_dll_append_~last~0#1.base| Int) (v_ArrVal_5118 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_38| v_ArrVal_5118))) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_38| 1)) (.cse2 (select .cse1 |ULTIMATE.start_dll_append_~last~0#1.base|)) (.cse3 (+ |ULTIMATE.start_dll_append_~last~0#1.offset| 4))) (or (not (= (select .cse0 (select (select .cse1 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) 1)) (not (= (select .cse2 .cse3) 0)) (not (< |v_ULTIMATE.start_dll_append_#t~ret7#1.base_38| |c_#StackHeapBarrier|)) (= (select .cse0 (select (select (store (store .cse1 |ULTIMATE.start_dll_append_~last~0#1.base| (store .cse2 .cse3 v_ArrVal_5108)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_38| v_ArrVal_5110) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1))))) is different from false [2023-02-14 13:54:40,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34688009] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:54:40,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:54:40,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 50 [2023-02-14 13:54:40,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272810390] [2023-02-14 13:54:40,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:54:40,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-14 13:54:40,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:54:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-14 13:54:40,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2744, Unknown=6, NotChecked=550, Total=3540 [2023-02-14 13:54:40,797 INFO L87 Difference]: Start difference. First operand 108 states and 120 transitions. Second operand has 51 states, 48 states have (on average 2.1875) internal successors, (105), 45 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:54:42,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:54:42,666 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2023-02-14 13:54:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-14 13:54:42,668 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 2.1875) internal successors, (105), 45 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2023-02-14 13:54:42,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:54:42,669 INFO L225 Difference]: With dead ends: 125 [2023-02-14 13:54:42,669 INFO L226 Difference]: Without dead ends: 125 [2023-02-14 13:54:42,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=681, Invalid=4734, Unknown=7, NotChecked=740, Total=6162 [2023-02-14 13:54:42,670 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 953 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 13:54:42,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [953 Valid, 622 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1254 Invalid, 0 Unknown, 343 Unchecked, 0.6s Time] [2023-02-14 13:54:42,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-14 13:54:42,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 108. [2023-02-14 13:54:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 101 states have internal predecessors, (109), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:54:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2023-02-14 13:54:42,673 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 63 [2023-02-14 13:54:42,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:54:42,674 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2023-02-14 13:54:42,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 2.1875) internal successors, (105), 45 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:54:42,674 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2023-02-14 13:54:42,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-14 13:54:42,674 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:54:42,675 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:54:42,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 13:54:42,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-14 13:54:42,877 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:54:42,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:54:42,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2060666116, now seen corresponding path program 1 times [2023-02-14 13:54:42,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:54:42,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655196279] [2023-02-14 13:54:42,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:54:42,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:54:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:44,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:54:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:44,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:54:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:44,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:54:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:54:48,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:54:48,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655196279] [2023-02-14 13:54:48,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655196279] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:54:48,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979741554] [2023-02-14 13:54:48,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:54:48,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:54:48,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:54:48,018 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:54:48,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 13:54:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:54:48,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 147 conjunts are in the unsatisfiable core [2023-02-14 13:54:48,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:54:48,337 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 13:54:48,413 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 13:54:48,588 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:54:48,589 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 17 treesize of output 21 [2023-02-14 13:54:48,831 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 13:54:49,011 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-02-14 13:54:49,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-02-14 13:54:49,215 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 11 treesize of output 7 [2023-02-14 13:54:49,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:54:49,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:49,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-14 13:54:49,468 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:54:49,468 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2023-02-14 13:54:49,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-02-14 13:54:49,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:54:49,904 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 78 treesize of output 37 [2023-02-14 13:54:49,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-14 13:54:49,914 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 0 case distinctions, treesize of input 16 treesize of output 10 [2023-02-14 13:54:50,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:50,403 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:54:50,403 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 84 treesize of output 70 [2023-02-14 13:54:50,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:50,419 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-14 13:54:50,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2023-02-14 13:54:50,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 13:54:50,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:50,439 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 14 treesize of output 16 [2023-02-14 13:54:51,459 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-14 13:54:51,460 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 180 treesize of output 129 [2023-02-14 13:54:51,473 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2023-02-14 13:54:51,473 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 69 treesize of output 49 [2023-02-14 13:54:51,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-02-14 13:54:51,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:51,605 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:54:51,605 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 82 treesize of output 68 [2023-02-14 13:54:51,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-14 13:54:51,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:54:51,625 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 14 treesize of output 16 [2023-02-14 13:54:51,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:54:51,746 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 63 treesize of output 30 [2023-02-14 13:54:51,750 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 15 treesize of output 7 [2023-02-14 13:54:51,916 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 15 treesize of output 7 [2023-02-14 13:54:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:54:51,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:54:51,995 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5411 (Array Int Int)) (v_ArrVal_5413 (Array Int Int)) (v_ArrVal_5412 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_5411) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_5413) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_5412) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2023-02-14 13:54:52,003 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5409 Int) (v_ArrVal_5411 (Array Int Int)) (v_ArrVal_5410 (Array Int Int)) (v_ArrVal_5413 (Array Int Int)) (v_ArrVal_5412 (Array Int Int)) (v_ArrVal_5408 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_5410) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_5411) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_5408) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_5413) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4) v_ArrVal_5409)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_5412) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2023-02-14 13:54:53,684 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5409 Int) (v_ArrVal_5411 (Array Int Int)) (v_ArrVal_5410 (Array Int Int)) (v_ArrVal_5413 (Array Int Int)) (v_ArrVal_5412 (Array Int Int)) (v_ArrVal_5426 (Array Int Int)) (|v_ULTIMATE.start_dll_append_#t~ret7#1.base_41| Int) (v_ArrVal_5428 (Array Int Int)) (v_ArrVal_5427 (Array Int Int)) (v_ArrVal_5408 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_28| Int)) (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_41| v_ArrVal_5427)) (.cse3 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_41| v_ArrVal_5426))) (let ((.cse1 (select (select .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (+ (select (select .cse3 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (.cse2 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_28| 4))) (or (not (< |v_ULTIMATE.start_dll_append_#t~ret7#1.base_41| |c_#StackHeapBarrier|)) (not (= (select (select .cse0 .cse1) .cse2) 0)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store (store |c_#memory_int| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_41| v_ArrVal_5428) .cse1 v_ArrVal_5410) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_41| v_ArrVal_5411) (select (select (store (store .cse0 .cse1 v_ArrVal_5408) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_41| v_ArrVal_5413) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store .cse3 .cse1 (store (select .cse3 .cse1) .cse2 v_ArrVal_5409)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_41| v_ArrVal_5412) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (not (= (select |c_#valid| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_41|) 0)))))) is different from false [2023-02-14 13:54:53,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979741554] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:54:53,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:54:53,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2023-02-14 13:54:53,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910389769] [2023-02-14 13:54:53,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:54:53,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-02-14 13:54:53,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:54:53,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-02-14 13:54:53,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=5565, Unknown=7, NotChecked=456, Total=6320 [2023-02-14 13:54:53,693 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 70 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 61 states have internal predecessors, (116), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:55:00,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:55:00,319 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2023-02-14 13:55:00,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-14 13:55:00,320 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 61 states have internal predecessors, (116), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 65 [2023-02-14 13:55:00,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:55:00,321 INFO L225 Difference]: With dead ends: 167 [2023-02-14 13:55:00,321 INFO L226 Difference]: Without dead ends: 167 [2023-02-14 13:55:00,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2657 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=928, Invalid=9997, Unknown=7, NotChecked=624, Total=11556 [2023-02-14 13:55:00,322 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 808 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 2572 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 2610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-14 13:55:00,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 1167 Invalid, 2610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2572 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-14 13:55:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-14 13:55:00,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 115. [2023-02-14 13:55:00,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 95 states have (on average 1.2210526315789474) internal successors, (116), 108 states have internal predecessors, (116), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:55:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2023-02-14 13:55:00,326 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 65 [2023-02-14 13:55:00,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:55:00,326 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2023-02-14 13:55:00,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 61 states have internal predecessors, (116), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:55:00,326 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2023-02-14 13:55:00,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-14 13:55:00,327 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:55:00,327 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:55:00,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-14 13:55:00,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-14 13:55:00,536 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:55:00,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:55:00,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1337458320, now seen corresponding path program 1 times [2023-02-14 13:55:00,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:55:00,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370530565] [2023-02-14 13:55:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:55:00,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:55:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:01,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:55:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:01,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:55:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:01,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:55:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:55:02,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:55:02,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370530565] [2023-02-14 13:55:02,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370530565] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:55:02,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338614516] [2023-02-14 13:55:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:55:02,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:55:02,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:55:02,670 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:55:02,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 13:55:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:02,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 134 conjunts are in the unsatisfiable core [2023-02-14 13:55:02,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:55:03,000 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 13:55:03,046 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 13:55:03,181 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:55:03,181 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 17 treesize of output 21 [2023-02-14 13:55:03,363 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 13:55:03,515 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-02-14 13:55:03,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-02-14 13:55:03,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:55:03,815 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:55:03,815 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2023-02-14 13:55:04,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:55:04,183 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 67 treesize of output 30 [2023-02-14 13:55:04,189 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 0 case distinctions, treesize of input 16 treesize of output 10 [2023-02-14 13:55:04,193 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 7 treesize of output 3 [2023-02-14 13:55:04,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:04,525 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-14 13:55:04,526 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 75 treesize of output 56 [2023-02-14 13:55:04,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:04,540 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-14 13:55:04,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2023-02-14 13:55:04,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:04,554 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 16 treesize of output 11 [2023-02-14 13:55:05,384 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-14 13:55:05,384 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 168 treesize of output 119 [2023-02-14 13:55:05,398 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2023-02-14 13:55:05,399 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 68 treesize of output 48 [2023-02-14 13:55:05,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:05,501 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:55:05,502 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 90 treesize of output 72 [2023-02-14 13:55:05,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:05,510 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 33 treesize of output 33 [2023-02-14 13:55:05,595 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 34 treesize of output 22 [2023-02-14 13:55:05,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:55:05,788 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 69 treesize of output 28 [2023-02-14 13:55:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:55:05,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:55:06,027 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5712 (Array Int Int)) (v_ArrVal_5713 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_5713) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_5712))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (+ .cse1 4))) 1) (not (<= 0 .cse1))))) is different from false [2023-02-14 13:55:06,308 INFO L321 Elim1Store]: treesize reduction 5, result has 89.4 percent of original size [2023-02-14 13:55:06,309 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 51 treesize of output 50 [2023-02-14 13:55:07,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338614516] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:55:07,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:55:07,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 65 [2023-02-14 13:55:07,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878082819] [2023-02-14 13:55:07,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:55:07,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-14 13:55:07,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:55:07,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-14 13:55:07,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=5848, Unknown=24, NotChecked=154, Total=6320 [2023-02-14 13:55:07,372 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 66 states, 63 states have (on average 1.8412698412698412) internal successors, (116), 57 states have internal predecessors, (116), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:55:12,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:55:12,469 INFO L93 Difference]: Finished difference Result 189 states and 206 transitions. [2023-02-14 13:55:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-14 13:55:12,470 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 63 states have (on average 1.8412698412698412) internal successors, (116), 57 states have internal predecessors, (116), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 68 [2023-02-14 13:55:12,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:55:12,470 INFO L225 Difference]: With dead ends: 189 [2023-02-14 13:55:12,471 INFO L226 Difference]: Without dead ends: 189 [2023-02-14 13:55:12,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=959, Invalid=10149, Unknown=26, NotChecked=208, Total=11342 [2023-02-14 13:55:12,472 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1290 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 2424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-14 13:55:12,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1290 Valid, 1020 Invalid, 2424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-14 13:55:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-02-14 13:55:12,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 119. [2023-02-14 13:55:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 112 states have internal predecessors, (122), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:55:12,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2023-02-14 13:55:12,476 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 68 [2023-02-14 13:55:12,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:55:12,476 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2023-02-14 13:55:12,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 63 states have (on average 1.8412698412698412) internal successors, (116), 57 states have internal predecessors, (116), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:55:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2023-02-14 13:55:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-14 13:55:12,477 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:55:12,478 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:55:12,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-14 13:55:12,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:55:12,686 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:55:12,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:55:12,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1337458321, now seen corresponding path program 1 times [2023-02-14 13:55:12,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:55:12,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751298206] [2023-02-14 13:55:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:55:12,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:55:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:14,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:55:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:14,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:55:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:14,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:55:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:55:15,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:55:15,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751298206] [2023-02-14 13:55:15,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751298206] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:55:15,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034771113] [2023-02-14 13:55:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:55:15,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:55:15,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:55:15,983 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:55:15,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 13:55:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:16,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 147 conjunts are in the unsatisfiable core [2023-02-14 13:55:16,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:55:16,338 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 13:55:16,388 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 13:55:16,540 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:55:16,541 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 17 treesize of output 21 [2023-02-14 13:55:16,801 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 13:55:16,960 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-02-14 13:55:16,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-02-14 13:55:17,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:55:17,166 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 13 treesize of output 9 [2023-02-14 13:55:17,299 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:55:17,299 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 70 [2023-02-14 13:55:17,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2023-02-14 13:55:17,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:55:17,775 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 101 treesize of output 48 [2023-02-14 13:55:17,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 26 treesize of output 14 [2023-02-14 13:55:17,791 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 0 case distinctions, treesize of input 16 treesize of output 10 [2023-02-14 13:55:18,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:18,168 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-14 13:55:18,168 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 109 treesize of output 80 [2023-02-14 13:55:18,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:18,188 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-14 13:55:18,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2023-02-14 13:55:18,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:18,196 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 50 treesize of output 42 [2023-02-14 13:55:18,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2023-02-14 13:55:19,246 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-14 13:55:19,246 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 183 treesize of output 130 [2023-02-14 13:55:19,268 INFO L321 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2023-02-14 13:55:19,269 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 83 treesize of output 62 [2023-02-14 13:55:19,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:19,384 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:55:19,384 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 105 treesize of output 83 [2023-02-14 13:55:19,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:19,393 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 48 treesize of output 47 [2023-02-14 13:55:19,879 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:55:19,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:19,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:55:19,882 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 113 treesize of output 57 [2023-02-14 13:55:19,887 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 13:55:19,888 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 1 case distinctions, treesize of input 39 treesize of output 25 [2023-02-14 13:55:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:55:20,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:55:29,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034771113] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:55:29,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:55:29,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 68 [2023-02-14 13:55:29,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930520412] [2023-02-14 13:55:29,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:55:29,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-14 13:55:29,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:55:29,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-14 13:55:29,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=6801, Unknown=25, NotChecked=0, Total=7140 [2023-02-14 13:55:29,935 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 69 states, 66 states have (on average 1.803030303030303) internal successors, (119), 60 states have internal predecessors, (119), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:55:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:55:39,545 INFO L93 Difference]: Finished difference Result 203 states and 222 transitions. [2023-02-14 13:55:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-14 13:55:39,545 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 66 states have (on average 1.803030303030303) internal successors, (119), 60 states have internal predecessors, (119), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 68 [2023-02-14 13:55:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:55:39,547 INFO L225 Difference]: With dead ends: 203 [2023-02-14 13:55:39,547 INFO L226 Difference]: Without dead ends: 203 [2023-02-14 13:55:39,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=1038, Invalid=12047, Unknown=25, NotChecked=0, Total=13110 [2023-02-14 13:55:39,548 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1674 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 3146 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1674 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:55:39,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1674 Valid, 1116 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3146 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-14 13:55:39,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-14 13:55:39,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 118. [2023-02-14 13:55:39,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 111 states have internal predecessors, (120), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:55:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2023-02-14 13:55:39,553 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 68 [2023-02-14 13:55:39,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:55:39,553 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2023-02-14 13:55:39,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 66 states have (on average 1.803030303030303) internal successors, (119), 60 states have internal predecessors, (119), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:55:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2023-02-14 13:55:39,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-14 13:55:39,555 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:55:39,555 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:55:39,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 13:55:39,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:55:39,764 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:55:39,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:55:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1488466325, now seen corresponding path program 1 times [2023-02-14 13:55:39,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:55:39,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94631185] [2023-02-14 13:55:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:55:39,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:55:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:41,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:55:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:41,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:55:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:42,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:55:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:55:42,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:55:42,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94631185] [2023-02-14 13:55:42,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94631185] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:55:42,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544569358] [2023-02-14 13:55:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:55:42,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:55:42,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:55:42,740 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:55:42,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 13:55:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 134 conjunts are in the unsatisfiable core [2023-02-14 13:55:43,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:55:43,101 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 13:55:43,152 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 13:55:43,318 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:55:43,318 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-14 13:55:43,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:55:43,697 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-02-14 13:55:43,698 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 4 case distinctions, treesize of input 22 treesize of output 33 [2023-02-14 13:55:43,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:55:44,028 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:55:44,028 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 51 [2023-02-14 13:55:44,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:55:44,418 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 79 treesize of output 34 [2023-02-14 13:55:44,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-02-14 13:55:44,427 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 7 treesize of output 3 [2023-02-14 13:55:44,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:44,874 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 14 treesize of output 16 [2023-02-14 13:55:44,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:44,888 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:55:44,889 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 85 treesize of output 67 [2023-02-14 13:55:44,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:44,920 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-14 13:55:44,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2023-02-14 13:55:45,988 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-14 13:55:45,988 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 161 treesize of output 112 [2023-02-14 13:55:46,006 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2023-02-14 13:55:46,007 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 49 treesize of output 33 [2023-02-14 13:55:46,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:46,120 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:55:46,121 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 83 treesize of output 65 [2023-02-14 13:55:46,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:46,134 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 14 treesize of output 16 [2023-02-14 13:55:46,221 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 15 treesize of output 7 [2023-02-14 13:55:46,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:55:46,457 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 68 treesize of output 27 [2023-02-14 13:55:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:55:46,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:55:46,623 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6310 (Array Int Int)) (v_ArrVal_6309 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6310) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (<= (+ .cse0 1) 0) (not (= (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6309))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (+ 4 .cse0)) 0))))) is different from false [2023-02-14 13:55:46,637 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6310 (Array Int Int)) (v_ArrVal_6306 Int) (v_ArrVal_6308 (Array Int Int)) (v_ArrVal_6309 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4) v_ArrVal_6306)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6310) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (<= (+ .cse0 1) 0) (not (= (select (let ((.cse1 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_6308) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6309))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (+ .cse0 4)) 0))))) is different from false [2023-02-14 13:55:47,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544569358] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:55:47,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:55:47,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36] total 70 [2023-02-14 13:55:47,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799458807] [2023-02-14 13:55:47,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:55:47,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-02-14 13:55:47,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:55:47,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-02-14 13:55:47,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=6007, Unknown=11, NotChecked=314, Total=6642 [2023-02-14 13:55:47,857 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand has 70 states, 68 states have (on average 1.7794117647058822) internal successors, (121), 61 states have internal predecessors, (121), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:55:57,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:55:57,175 INFO L93 Difference]: Finished difference Result 187 states and 202 transitions. [2023-02-14 13:55:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-14 13:55:57,175 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 1.7794117647058822) internal successors, (121), 61 states have internal predecessors, (121), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 69 [2023-02-14 13:55:57,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:55:57,176 INFO L225 Difference]: With dead ends: 187 [2023-02-14 13:55:57,176 INFO L226 Difference]: Without dead ends: 187 [2023-02-14 13:55:57,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3340 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1317, Invalid=12252, Unknown=11, NotChecked=462, Total=14042 [2023-02-14 13:55:57,177 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1626 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 2813 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1626 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:55:57,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1626 Valid, 1073 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2813 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-14 13:55:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-02-14 13:55:57,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 123. [2023-02-14 13:55:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 103 states have (on average 1.2135922330097086) internal successors, (125), 116 states have internal predecessors, (125), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:55:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2023-02-14 13:55:57,181 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 69 [2023-02-14 13:55:57,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:55:57,181 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2023-02-14 13:55:57,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 1.7794117647058822) internal successors, (121), 61 states have internal predecessors, (121), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:55:57,182 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2023-02-14 13:55:57,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-14 13:55:57,183 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:55:57,183 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:55:57,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-02-14 13:55:57,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-02-14 13:55:57,393 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:55:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:55:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1102226234, now seen corresponding path program 1 times [2023-02-14 13:55:57,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:55:57,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58106265] [2023-02-14 13:55:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:55:57,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:55:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:59,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:55:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:59,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:55:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:59,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:55:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:56:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:56:01,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:56:01,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58106265] [2023-02-14 13:56:01,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58106265] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:56:01,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89375141] [2023-02-14 13:56:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:56:01,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:56:01,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:56:01,187 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:56:01,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-14 13:56:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:56:01,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 183 conjunts are in the unsatisfiable core [2023-02-14 13:56:01,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:56:01,579 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 13:56:01,646 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 13:56:01,834 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:56:01,835 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 17 treesize of output 21 [2023-02-14 13:56:01,997 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 11 treesize of output 7 [2023-02-14 13:56:02,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:02,081 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 21 treesize of output 20 [2023-02-14 13:56:02,206 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 13:56:02,666 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:56:02,667 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-02-14 13:56:02,670 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 13:56:02,698 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-02-14 13:56:02,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-02-14 13:56:02,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 13:56:02,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:56:02,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 13:56:02,951 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 13 treesize of output 9 [2023-02-14 13:56:03,100 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:56:03,101 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 91 [2023-02-14 13:56:03,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:03,111 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 45 treesize of output 38 [2023-02-14 13:56:03,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-02-14 13:56:03,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:56:03,604 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 93 treesize of output 44 [2023-02-14 13:56:03,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2023-02-14 13:56:03,618 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 0 case distinctions, treesize of input 16 treesize of output 10 [2023-02-14 13:56:04,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:04,047 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-14 13:56:04,048 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 101 treesize of output 74 [2023-02-14 13:56:04,062 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2023-02-14 13:56:04,062 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 1 case distinctions, treesize of input 24 treesize of output 31 [2023-02-14 13:56:04,066 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 13:56:04,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:04,088 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-02-14 13:56:04,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2023-02-14 13:56:04,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:04,101 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 27 treesize of output 25 [2023-02-14 13:56:05,294 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2023-02-14 13:56:05,295 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 233 treesize of output 168 [2023-02-14 13:56:05,334 INFO L321 Elim1Store]: treesize reduction 120, result has 15.5 percent of original size [2023-02-14 13:56:05,334 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 118 treesize of output 91 [2023-02-14 13:56:05,342 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:56:05,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:05,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 42 [2023-02-14 13:56:05,348 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 3 [2023-02-14 13:56:05,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:05,473 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:56:05,473 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 103 treesize of output 83 [2023-02-14 13:56:05,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-02-14 13:56:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:05,497 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 31 treesize of output 34 [2023-02-14 13:56:06,019 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:56:06,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:06,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:56:06,022 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 111 treesize of output 59 [2023-02-14 13:56:06,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2023-02-14 13:56:06,170 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 15 treesize of output 7 [2023-02-14 13:56:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:56:06,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:56:06,777 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6618 Int) (v_ArrVal_6621 (Array Int Int)) (v_ArrVal_6623 (Array Int Int)) (v_ArrVal_6625 (Array Int Int)) (v_ArrVal_6624 (Array Int Int)) (v_ArrVal_6620 Int)) (let ((.cse1 (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4))) (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse1 v_ArrVal_6620)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6625))) (let ((.cse0 (select (select .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (<= 0 .cse0)) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse2 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_6621) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6623))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (+ .cse0 4))) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse1 v_ArrVal_6618)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6624) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4)))))))))) is different from false [2023-02-14 13:56:08,504 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6618 Int) (v_ArrVal_6640 (Array Int Int)) (v_ArrVal_6621 (Array Int Int)) (v_ArrVal_6623 (Array Int Int)) (v_ArrVal_6625 (Array Int Int)) (v_ArrVal_6624 (Array Int Int)) (|v_ULTIMATE.start_dll_append_#t~ret7#1.base_53| Int) (v_ArrVal_6638 (Array Int Int)) (v_ArrVal_6620 Int) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_38| Int) (v_ArrVal_6639 (Array Int Int))) (let ((.cse9 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_53| v_ArrVal_6640)) (.cse8 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_53| v_ArrVal_6638))) (let ((.cse10 (select (select .cse8 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse11 (+ (select (select .cse9 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (let ((.cse1 (select (select .cse8 .cse10) .cse11)) (.cse2 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_38| 4))) (let ((.cse6 (store (store .cse9 .cse1 (store (select .cse9 .cse1) .cse2 v_ArrVal_6620)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_53| v_ArrVal_6625))) (let ((.cse7 (select (select .cse6 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (< |v_ULTIMATE.start_dll_append_#t~ret7#1.base_53| |c_#StackHeapBarrier|)) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse3 (store (store .cse8 .cse1 v_ArrVal_6621) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_53| v_ArrVal_6623))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (+ .cse7 4))) (select (select (store (let ((.cse0 (store |c_#memory_int| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_53| v_ArrVal_6639))) (store .cse0 .cse1 (store (select .cse0 .cse1) .cse2 v_ArrVal_6618))) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_53| v_ArrVal_6624) (select (select .cse3 .cse4) .cse5)) (select (select .cse6 .cse4) .cse5))))) (not (<= 0 .cse7)) (< |v_ULTIMATE.start_dll_append_~last~0#1.offset_38| (select (select .cse9 .cse10) .cse11)) (not (= (select (select .cse8 .cse1) .cse2) 0)) (not (= (select |c_#valid| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_53|) 0))))))))) is different from false [2023-02-14 13:56:08,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89375141] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:56:08,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:56:08,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 40] total 74 [2023-02-14 13:56:08,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834221977] [2023-02-14 13:56:08,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:56:08,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-14 13:56:08,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:56:08,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-14 13:56:08,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=6952, Unknown=33, NotChecked=338, Total=7656 [2023-02-14 13:56:08,508 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand has 74 states, 72 states have (on average 1.6944444444444444) internal successors, (122), 64 states have internal predecessors, (122), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:56:15,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:56:15,265 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2023-02-14 13:56:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-14 13:56:15,269 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 72 states have (on average 1.6944444444444444) internal successors, (122), 64 states have internal predecessors, (122), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 70 [2023-02-14 13:56:15,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:56:15,272 INFO L225 Difference]: With dead ends: 174 [2023-02-14 13:56:15,273 INFO L226 Difference]: Without dead ends: 174 [2023-02-14 13:56:15,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 119 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2929 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1118, Invalid=12897, Unknown=35, NotChecked=470, Total=14520 [2023-02-14 13:56:15,274 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 832 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 3130 mSolverCounterSat, 49 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 3181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 3130 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:56:15,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 1222 Invalid, 3181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 3130 Invalid, 2 Unknown, 0 Unchecked, 2.2s Time] [2023-02-14 13:56:15,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-02-14 13:56:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 123. [2023-02-14 13:56:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 103 states have (on average 1.203883495145631) internal successors, (124), 116 states have internal predecessors, (124), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:56:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2023-02-14 13:56:15,279 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 70 [2023-02-14 13:56:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:56:15,279 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2023-02-14 13:56:15,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 72 states have (on average 1.6944444444444444) internal successors, (122), 64 states have internal predecessors, (122), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:56:15,280 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2023-02-14 13:56:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-14 13:56:15,280 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:56:15,281 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:56:15,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-14 13:56:15,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-14 13:56:15,489 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:56:15,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:56:15,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1397517466, now seen corresponding path program 2 times [2023-02-14 13:56:15,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:56:15,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602076875] [2023-02-14 13:56:15,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:56:15,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:56:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:56:19,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:56:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:56:19,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:56:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:56:20,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:56:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:56:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:56:20,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:56:20,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602076875] [2023-02-14 13:56:20,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602076875] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:56:20,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318819215] [2023-02-14 13:56:20,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:56:20,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:56:20,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:56:20,864 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:56:20,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-14 13:56:21,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:56:21,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:56:21,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 163 conjunts are in the unsatisfiable core [2023-02-14 13:56:21,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:56:21,368 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 13:56:21,438 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 13:56:21,622 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:56:21,623 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 11 [2023-02-14 13:56:21,944 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:56:21,944 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 11 [2023-02-14 13:56:22,174 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 13 treesize of output 9 [2023-02-14 13:56:22,182 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 13 treesize of output 9 [2023-02-14 13:56:22,293 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:56:22,293 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 56 treesize of output 53 [2023-02-14 13:56:22,300 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 22 treesize of output 24 [2023-02-14 13:56:22,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:56:22,723 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 62 treesize of output 29 [2023-02-14 13:56:22,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:56:22,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:56:22,740 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 1 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 13:56:23,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:23,323 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:56:23,323 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 68 treesize of output 58 [2023-02-14 13:56:23,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:23,337 INFO L321 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2023-02-14 13:56:23,338 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 2 case distinctions, treesize of input 25 treesize of output 38 [2023-02-14 13:56:23,369 INFO L321 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2023-02-14 13:56:23,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 57 [2023-02-14 13:56:24,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:24,335 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:56:24,354 INFO L321 Elim1Store]: treesize reduction 103, result has 14.9 percent of original size [2023-02-14 13:56:24,354 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 160 treesize of output 85 [2023-02-14 13:56:24,367 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-14 13:56:24,367 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 1 case distinctions, treesize of input 50 treesize of output 47 [2023-02-14 13:56:24,579 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2023-02-14 13:56:24,579 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 256 treesize of output 187 [2023-02-14 13:56:24,600 INFO L321 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2023-02-14 13:56:24,601 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 195 treesize of output 163 [2023-02-14 13:56:25,311 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-02-14 13:56:25,311 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 195 treesize of output 117 [2023-02-14 13:56:25,649 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:56:25,650 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 46 [2023-02-14 13:56:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:56:25,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:56:27,872 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6924 (Array Int Int)) (v_ArrVal_6928 (Array Int Int)) (v_ArrVal_6927 (Array Int Int))) (let ((.cse7 (+ |c_ULTIMATE.start_dll_append_#t~mem9#1.offset| 4))) (let ((.cse6 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_#t~mem9#1.base|) .cse7))) (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| .cse6 v_ArrVal_6924) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6927))) (let ((.cse4 (select (select .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (store (store |c_#memory_$Pointer$.base| .cse6 (store (select |c_#memory_$Pointer$.base| .cse6) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_#t~mem9#1.base|) .cse7) 4) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_6928))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse3 (+ .cse4 4))) (let ((.cse0 (select (select .cse5 .cse2) .cse3))) (or (not (<= 0 .cse0)) (= (select |c_#valid| (select (select .cse1 (select (select .cse1 .cse2) .cse3)) (+ .cse0 4))) 1) (not (<= 0 .cse4)))))))))) is different from false [2023-02-14 13:56:28,281 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6924 (Array Int Int)) (v_ArrVal_6928 (Array Int Int)) (v_ArrVal_6927 (Array Int Int))) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse8 (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (let ((.cse6 (select (select |c_#memory_$Pointer$.base| .cse7) .cse8))) (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| .cse6 v_ArrVal_6924) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_6927))) (let ((.cse4 (select (select .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (store (store |c_#memory_$Pointer$.base| .cse6 (store (select |c_#memory_$Pointer$.base| .cse6) (+ (select (select |c_#memory_$Pointer$.offset| .cse7) .cse8) 4) |c_ULTIMATE.start_dll_append_#t~ret7#1.base|)) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_6928))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse3 (+ 4 .cse4))) (let ((.cse0 (select (select .cse5 .cse2) .cse3))) (or (not (<= 0 .cse0)) (= (select |c_#valid| (select (select .cse1 (select (select .cse1 .cse2) .cse3)) (+ .cse0 4))) 1) (not (<= 0 .cse4)))))))))) is different from false [2023-02-14 13:56:28,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318819215] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:56:28,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:56:28,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 35] total 77 [2023-02-14 13:56:28,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41559249] [2023-02-14 13:56:28,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:56:28,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-02-14 13:56:28,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:56:28,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-02-14 13:56:28,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=8050, Unknown=65, NotChecked=362, Total=8742 [2023-02-14 13:56:28,756 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand has 78 states, 75 states have (on average 1.68) internal successors, (126), 69 states have internal predecessors, (126), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:56:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:56:44,300 INFO L93 Difference]: Finished difference Result 272 states and 296 transitions. [2023-02-14 13:56:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-14 13:56:44,300 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 75 states have (on average 1.68) internal successors, (126), 69 states have internal predecessors, (126), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 73 [2023-02-14 13:56:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:56:44,301 INFO L225 Difference]: With dead ends: 272 [2023-02-14 13:56:44,301 INFO L226 Difference]: Without dead ends: 272 [2023-02-14 13:56:44,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 150 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 4243 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=1554, Invalid=20735, Unknown=69, NotChecked=594, Total=22952 [2023-02-14 13:56:44,302 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2277 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 3978 mSolverCounterSat, 107 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2277 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 4087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 3978 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-02-14 13:56:44,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2277 Valid, 1461 Invalid, 4087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 3978 Invalid, 2 Unknown, 0 Unchecked, 2.9s Time] [2023-02-14 13:56:44,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-14 13:56:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 126. [2023-02-14 13:56:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 106 states have (on average 1.2169811320754718) internal successors, (129), 119 states have internal predecessors, (129), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 13:56:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 139 transitions. [2023-02-14 13:56:44,307 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 139 transitions. Word has length 73 [2023-02-14 13:56:44,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:56:44,307 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 139 transitions. [2023-02-14 13:56:44,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 75 states have (on average 1.68) internal successors, (126), 69 states have internal predecessors, (126), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 13:56:44,307 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 139 transitions. [2023-02-14 13:56:44,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-14 13:56:44,308 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:56:44,308 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:56:44,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-14 13:56:44,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:56:44,517 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-14 13:56:44,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:56:44,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1397517467, now seen corresponding path program 2 times [2023-02-14 13:56:44,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:56:44,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415003537] [2023-02-14 13:56:44,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:56:44,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:56:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:56:46,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:56:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:56:47,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:56:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:56:47,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 13:56:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:56:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:56:47,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:56:47,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415003537] [2023-02-14 13:56:47,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415003537] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:56:47,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192601104] [2023-02-14 13:56:47,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:56:47,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:56:47,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:56:47,619 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:56:47,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-14 13:56:48,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:56:48,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:56:48,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 145 conjunts are in the unsatisfiable core [2023-02-14 13:56:48,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:56:48,151 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 13:56:48,748 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 34 treesize of output 18 [2023-02-14 13:56:48,751 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 7 treesize of output 3 [2023-02-14 13:56:48,755 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 13:56:48,760 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 13:56:49,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:49,330 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 14 treesize of output 16 [2023-02-14 13:56:49,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:49,346 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 16 treesize of output 18 [2023-02-14 13:56:49,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:49,352 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 42 treesize of output 38 [2023-02-14 13:56:49,365 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 13:56:49,365 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 13:56:50,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:50,434 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2023-02-14 13:56:50,435 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 70 [2023-02-14 13:56:50,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:50,464 INFO L321 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2023-02-14 13:56:50,464 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 55 treesize of output 52 [2023-02-14 13:56:50,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:50,644 INFO L321 Elim1Store]: treesize reduction 120, result has 18.9 percent of original size [2023-02-14 13:56:50,644 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 8 new quantified variables, introduced 6 case distinctions, treesize of input 516 treesize of output 188 [2023-02-14 13:56:50,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:56:50,686 INFO L321 Elim1Store]: treesize reduction 104, result has 24.6 percent of original size [2023-02-14 13:56:50,686 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 8 new quantified variables, introduced 5 case distinctions, treesize of input 459 treesize of output 233 [2023-02-14 13:56:53,334 INFO L321 Elim1Store]: treesize reduction 172, result has 67.2 percent of original size [2023-02-14 13:56:53,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 17 new quantified variables, introduced 45 case distinctions, treesize of input 568 treesize of output 569 [2023-02-14 13:56:54,000 INFO L321 Elim1Store]: treesize reduction 138, result has 64.3 percent of original size [2023-02-14 13:56:54,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 13 new quantified variables, introduced 45 case distinctions, treesize of input 582 treesize of output 665