./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.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/dll2c_prepend_unequal.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 583b66b9d59d34de12ff7e58a8eb24a95055476e3f5044dc2a7c6b2bb83f4c67 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 13:53:13,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 13:53:13,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 13:53:13,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 13:53:13,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 13:53:13,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 13:53:13,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 13:53:13,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 13:53:13,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 13:53:13,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 13:53:13,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 13:53:13,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 13:53:13,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 13:53:13,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 13:53:13,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 13:53:13,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 13:53:13,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 13:53:13,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 13:53:13,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 13:53:13,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 13:53:13,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 13:53:13,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 13:53:13,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 13:53:13,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 13:53:13,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 13:53:13,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 13:53:13,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 13:53:13,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 13:53:13,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 13:53:13,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 13:53:13,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 13:53:13,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 13:53:13,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 13:53:13,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 13:53:13,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 13:53:13,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 13:53:13,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 13:53:13,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 13:53:13,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 13:53:13,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 13:53:13,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 13:53:13,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-14 13:53:13,784 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 13:53:13,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 13:53:13,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 13:53:13,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 13:53:13,785 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 13:53:13,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 13:53:13,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 13:53:13,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 13:53:13,787 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 13:53:13,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 13:53:13,788 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 13:53:13,788 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-14 13:53:13,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 13:53:13,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 13:53:13,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 13:53:13,788 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-14 13:53:13,789 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-14 13:53:13,789 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-14 13:53:13,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 13:53:13,789 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-14 13:53:13,789 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 13:53:13,789 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 13:53:13,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 13:53:13,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 13:53:13,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 13:53:13,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:53:13,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 13:53:13,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 13:53:13,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 13:53:13,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 13:53:13,791 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 13:53:13,791 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 13:53:13,791 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 13:53:13,791 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 13:53:13,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 583b66b9d59d34de12ff7e58a8eb24a95055476e3f5044dc2a7c6b2bb83f4c67 [2023-02-14 13:53:13,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 13:53:13,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 13:53:13,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 13:53:13,999 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 13:53:14,000 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 13:53:14,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2023-02-14 13:53:14,847 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 13:53:15,076 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 13:53:15,077 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2023-02-14 13:53:15,085 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c53aed57/6c99f39a0d174ba495baa2355221d1a0/FLAG22f6bf96b [2023-02-14 13:53:15,102 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c53aed57/6c99f39a0d174ba495baa2355221d1a0 [2023-02-14 13:53:15,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 13:53:15,105 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 13:53:15,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 13:53:15,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 13:53:15,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 13:53:15,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:53:15" (1/1) ... [2023-02-14 13:53:15,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13322829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:15, skipping insertion in model container [2023-02-14 13:53:15,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:53:15" (1/1) ... [2023-02-14 13:53:15,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 13:53:15,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 13:53:15,376 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/dll2c_prepend_unequal.i[24729,24742] [2023-02-14 13:53:15,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:53:15,387 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 13:53:15,439 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/dll2c_prepend_unequal.i[24729,24742] [2023-02-14 13:53:15,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:53:15,461 INFO L208 MainTranslator]: Completed translation [2023-02-14 13:53:15,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:15 WrapperNode [2023-02-14 13:53:15,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 13:53:15,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 13:53:15,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 13:53:15,464 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 13:53:15,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:15" (1/1) ... [2023-02-14 13:53:15,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:15" (1/1) ... [2023-02-14 13:53:15,516 INFO L138 Inliner]: procedures = 127, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 149 [2023-02-14 13:53:15,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 13:53:15,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 13:53:15,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 13:53:15,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 13:53:15,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:15" (1/1) ... [2023-02-14 13:53:15,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:15" (1/1) ... [2023-02-14 13:53:15,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:15" (1/1) ... [2023-02-14 13:53:15,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:15" (1/1) ... [2023-02-14 13:53:15,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:15" (1/1) ... [2023-02-14 13:53:15,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:15" (1/1) ... [2023-02-14 13:53:15,554 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:15" (1/1) ... [2023-02-14 13:53:15,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:15" (1/1) ... [2023-02-14 13:53:15,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 13:53:15,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 13:53:15,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 13:53:15,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 13:53:15,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:15" (1/1) ... [2023-02-14 13:53:15,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:53:15,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:15,592 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 13:53:15,593 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 13:53:15,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 13:53:15,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 13:53:15,614 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-14 13:53:15,614 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-14 13:53:15,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 13:53:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 13:53:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 13:53:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-14 13:53:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-14 13:53:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 13:53:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-14 13:53:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 13:53:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 13:53:15,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 13:53:15,731 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 13:53:15,733 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 13:53:16,001 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 13:53:16,005 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 13:53:16,006 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 13:53:16,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:53:16 BoogieIcfgContainer [2023-02-14 13:53:16,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 13:53:16,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 13:53:16,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 13:53:16,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 13:53:16,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:53:15" (1/3) ... [2023-02-14 13:53:16,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eac1f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:53:16, skipping insertion in model container [2023-02-14 13:53:16,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:53:15" (2/3) ... [2023-02-14 13:53:16,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eac1f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:53:16, skipping insertion in model container [2023-02-14 13:53:16,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:53:16" (3/3) ... [2023-02-14 13:53:16,012 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_unequal.i [2023-02-14 13:53:16,027 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 13:53:16,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2023-02-14 13:53:16,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 13:53:16,079 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;@ca778e6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 13:53:16,079 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2023-02-14 13:53:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 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 13:53:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-14 13:53:16,086 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:16,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-14 13:53:16,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:16,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:16,091 INFO L85 PathProgramCache]: Analyzing trace with hash 895672562, now seen corresponding path program 1 times [2023-02-14 13:53:16,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:16,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245908858] [2023-02-14 13:53:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:16,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:16,312 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 13:53:16,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:16,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245908858] [2023-02-14 13:53:16,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245908858] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:16,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:16,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 13:53:16,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493766111] [2023-02-14 13:53:16,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:16,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 13:53:16,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:16,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 13:53:16,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 13:53:16,340 INFO L87 Difference]: Start difference. First operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 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) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 13:53:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:16,474 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2023-02-14 13:53:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 13:53:16,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2023-02-14 13:53:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:16,486 INFO L225 Difference]: With dead ends: 135 [2023-02-14 13:53:16,486 INFO L226 Difference]: Without dead ends: 132 [2023-02-14 13:53:16,488 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 13:53:16,491 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:16,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 207 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:16,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-14 13:53:16,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-02-14 13:53:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 67 states have (on average 2.014925373134328) internal successors, (135), 127 states have internal predecessors, (135), 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 13:53:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2023-02-14 13:53:16,519 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 6 [2023-02-14 13:53:16,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:16,519 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2023-02-14 13:53:16,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 13:53:16,520 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2023-02-14 13:53:16,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-14 13:53:16,520 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:16,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-14 13:53:16,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 13:53:16,521 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:16,521 INFO L85 PathProgramCache]: Analyzing trace with hash 895672563, now seen corresponding path program 1 times [2023-02-14 13:53:16,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:16,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372733235] [2023-02-14 13:53:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:16,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:16,607 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 13:53:16,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:16,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372733235] [2023-02-14 13:53:16,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372733235] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:16,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:16,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 13:53:16,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633853474] [2023-02-14 13:53:16,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:16,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 13:53:16,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:16,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 13:53:16,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 13:53:16,612 INFO L87 Difference]: Start difference. First operand 132 states and 141 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 13:53:16,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:16,701 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2023-02-14 13:53:16,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 13:53:16,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2023-02-14 13:53:16,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:16,705 INFO L225 Difference]: With dead ends: 129 [2023-02-14 13:53:16,705 INFO L226 Difference]: Without dead ends: 129 [2023-02-14 13:53:16,706 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 13:53:16,707 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 5 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:16,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 209 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:16,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-14 13:53:16,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-02-14 13:53:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 124 states have internal predecessors, (132), 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 13:53:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2023-02-14 13:53:16,713 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 6 [2023-02-14 13:53:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:16,714 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2023-02-14 13:53:16,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 13:53:16,714 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2023-02-14 13:53:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 13:53:16,714 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:16,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:16,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 13:53:16,715 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:16,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:16,716 INFO L85 PathProgramCache]: Analyzing trace with hash -753542016, now seen corresponding path program 1 times [2023-02-14 13:53:16,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:16,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056530320] [2023-02-14 13:53:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:16,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:16,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:16,820 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 13:53:16,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:16,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056530320] [2023-02-14 13:53:16,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056530320] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:16,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:16,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 13:53:16,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670013092] [2023-02-14 13:53:16,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:16,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 13:53:16,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:16,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 13:53:16,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 13:53:16,829 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 13:53:16,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:16,921 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2023-02-14 13:53:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 13:53:16,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 13:53:16,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:16,922 INFO L225 Difference]: With dead ends: 140 [2023-02-14 13:53:16,922 INFO L226 Difference]: Without dead ends: 140 [2023-02-14 13:53:16,922 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 13:53:16,923 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 10 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:16,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 313 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:16,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-14 13:53:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2023-02-14 13:53:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 125 states have internal predecessors, (133), 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 13:53:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2023-02-14 13:53:16,930 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 14 [2023-02-14 13:53:16,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:16,930 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2023-02-14 13:53:16,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 13:53:16,931 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2023-02-14 13:53:16,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 13:53:16,931 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:16,931 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:16,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 13:53:16,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:16,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:16,932 INFO L85 PathProgramCache]: Analyzing trace with hash 265974304, now seen corresponding path program 1 times [2023-02-14 13:53:16,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:16,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011400116] [2023-02-14 13:53:16,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:16,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:17,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:17,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:53:17,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:17,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011400116] [2023-02-14 13:53:17,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011400116] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:17,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:17,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 13:53:17,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207401488] [2023-02-14 13:53:17,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:17,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 13:53:17,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:17,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 13:53:17,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:53:17,054 INFO L87 Difference]: Start difference. First operand 130 states and 139 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 13:53:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:17,254 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2023-02-14 13:53:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:53:17,255 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 24 [2023-02-14 13:53:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:17,257 INFO L225 Difference]: With dead ends: 130 [2023-02-14 13:53:17,257 INFO L226 Difference]: Without dead ends: 130 [2023-02-14 13:53:17,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 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 13:53:17,265 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 21 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:17,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 426 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:53:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-14 13:53:17,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2023-02-14 13:53:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 68 states have (on average 1.9411764705882353) internal successors, (132), 124 states have internal predecessors, (132), 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 13:53:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2023-02-14 13:53:17,282 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 24 [2023-02-14 13:53:17,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:17,283 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2023-02-14 13:53:17,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 13:53:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2023-02-14 13:53:17,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 13:53:17,284 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:17,284 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:17,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 13:53:17,285 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:17,286 INFO L85 PathProgramCache]: Analyzing trace with hash 265974305, now seen corresponding path program 1 times [2023-02-14 13:53:17,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:17,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653358998] [2023-02-14 13:53:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:17,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:17,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:17,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:53:17,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:17,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653358998] [2023-02-14 13:53:17,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653358998] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:17,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:17,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 13:53:17,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220288372] [2023-02-14 13:53:17,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:17,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 13:53:17,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:17,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 13:53:17,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:53:17,553 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 13:53:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:17,750 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2023-02-14 13:53:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:53:17,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 24 [2023-02-14 13:53:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:17,751 INFO L225 Difference]: With dead ends: 129 [2023-02-14 13:53:17,752 INFO L226 Difference]: Without dead ends: 129 [2023-02-14 13:53:17,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 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 13:53:17,752 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 19 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:17,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 450 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:53:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-14 13:53:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2023-02-14 13:53:17,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 123 states have internal predecessors, (131), 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 13:53:17,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2023-02-14 13:53:17,757 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 24 [2023-02-14 13:53:17,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:17,757 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2023-02-14 13:53:17,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 13:53:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2023-02-14 13:53:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 13:53:17,764 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:17,764 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:17,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 13:53:17,765 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:17,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:17,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731903, now seen corresponding path program 1 times [2023-02-14 13:53:17,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:17,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677566961] [2023-02-14 13:53:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:17,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:17,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:17,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:53:17,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:17,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677566961] [2023-02-14 13:53:17,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677566961] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:17,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102988335] [2023-02-14 13:53:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:17,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:17,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:17,976 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 13:53:18,008 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 13:53:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:18,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 13:53:18,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:18,122 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 13:53:18,178 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_352 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_352))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-14 13:53:18,233 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 13:53:18,233 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 13:53:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-02-14 13:53:18,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:18,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102988335] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:18,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:18,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2023-02-14 13:53:18,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404419201] [2023-02-14 13:53:18,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:18,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 13:53:18,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:18,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 13:53:18,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-02-14 13:53:18,299 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 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 13:53:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:18,568 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2023-02-14 13:53:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:53:18,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 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 26 [2023-02-14 13:53:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:18,569 INFO L225 Difference]: With dead ends: 153 [2023-02-14 13:53:18,569 INFO L226 Difference]: Without dead ends: 153 [2023-02-14 13:53:18,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-02-14 13:53:18,570 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 107 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:18,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 404 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 453 Invalid, 0 Unknown, 158 Unchecked, 0.2s Time] [2023-02-14 13:53:18,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-14 13:53:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 133. [2023-02-14 13:53:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 127 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 13:53:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2023-02-14 13:53:18,574 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 26 [2023-02-14 13:53:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:18,574 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2023-02-14 13:53:18,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 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 13:53:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2023-02-14 13:53:18,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 13:53:18,574 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:18,574 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:18,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 13:53:18,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-14 13:53:18,775 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:18,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:18,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731902, now seen corresponding path program 1 times [2023-02-14 13:53:18,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:18,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787865302] [2023-02-14 13:53:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:18,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:18,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:19,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:53:19,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:19,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787865302] [2023-02-14 13:53:19,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787865302] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:19,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436623459] [2023-02-14 13:53:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:19,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:19,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:19,082 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 13:53:19,084 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 13:53:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:19,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-14 13:53:19,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:19,176 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 13:53:19,398 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:53:19,399 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 20 [2023-02-14 13:53:19,410 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:53:19,411 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 13:53:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:53:19,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:23,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436623459] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:23,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:23,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2023-02-14 13:53:23,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444925399] [2023-02-14 13:53:23,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:23,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 13:53:23,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:23,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 13:53:23,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2023-02-14 13:53:23,629 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 13:53:24,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:24,252 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2023-02-14 13:53:24,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:53:24,253 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-02-14 13:53:24,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:24,254 INFO L225 Difference]: With dead ends: 135 [2023-02-14 13:53:24,254 INFO L226 Difference]: Without dead ends: 135 [2023-02-14 13:53:24,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2023-02-14 13:53:24,254 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 15 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:24,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 976 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 13:53:24,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-14 13:53:24,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2023-02-14 13:53:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.8888888888888888) internal successors, (136), 127 states have internal predecessors, (136), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 13:53:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2023-02-14 13:53:24,258 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 26 [2023-02-14 13:53:24,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:24,258 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2023-02-14 13:53:24,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 13:53:24,258 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2023-02-14 13:53:24,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 13:53:24,258 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:24,258 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] [2023-02-14 13:53:24,266 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 13:53:24,463 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,SelfDestructingSolverStorable6 [2023-02-14 13:53:24,464 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:24,464 INFO L85 PathProgramCache]: Analyzing trace with hash -619542825, now seen corresponding path program 1 times [2023-02-14 13:53:24,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:24,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494645778] [2023-02-14 13:53:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:24,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:24,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:24,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:53:24,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:24,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494645778] [2023-02-14 13:53:24,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494645778] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:24,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772501075] [2023-02-14 13:53:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:24,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:24,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:24,594 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 13:53:24,598 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 13:53:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:24,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 13:53:24,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:53:24,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:53:24,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772501075] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:53:24,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:53:24,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2023-02-14 13:53:24,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509355867] [2023-02-14 13:53:24,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:24,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 13:53:24,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 13:53:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:53:24,774 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:53:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:24,889 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2023-02-14 13:53:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:53:24,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-02-14 13:53:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:24,890 INFO L225 Difference]: With dead ends: 134 [2023-02-14 13:53:24,891 INFO L226 Difference]: Without dead ends: 134 [2023-02-14 13:53:24,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 5 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 13:53:24,891 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 4 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:24,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 660 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-02-14 13:53:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2023-02-14 13:53:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.875) internal successors, (135), 127 states have internal predecessors, (135), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 13:53:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2023-02-14 13:53:24,894 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 28 [2023-02-14 13:53:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:24,894 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2023-02-14 13:53:24,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:53:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2023-02-14 13:53:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 13:53:24,895 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:24,895 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] [2023-02-14 13:53:24,902 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 13:53:25,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:25,100 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:25,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739054, now seen corresponding path program 1 times [2023-02-14 13:53:25,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:25,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825243800] [2023-02-14 13:53:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:25,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:25,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:25,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:25,165 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 13:53:25,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:25,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825243800] [2023-02-14 13:53:25,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825243800] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:25,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821865409] [2023-02-14 13:53:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:25,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:25,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:25,167 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 13:53:25,169 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 13:53:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:25,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 13:53:25,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:25,297 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 13:53:25,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:25,306 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 13:53:25,306 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 12 treesize of output 11 [2023-02-14 13:53:25,319 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 13:53:25,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821865409] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:53:25,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:53:25,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2023-02-14 13:53:25,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968243198] [2023-02-14 13:53:25,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:25,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 13:53:25,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:25,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 13:53:25,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:53:25,322 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:53:25,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:25,481 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2023-02-14 13:53:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:53:25,481 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-02-14 13:53:25,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:25,482 INFO L225 Difference]: With dead ends: 138 [2023-02-14 13:53:25,482 INFO L226 Difference]: Without dead ends: 138 [2023-02-14 13:53:25,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-14 13:53:25,482 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 11 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:25,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 429 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:25,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-14 13:53:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2023-02-14 13:53:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8666666666666667) internal successors, (140), 130 states have internal predecessors, (140), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 13:53:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2023-02-14 13:53:25,485 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 29 [2023-02-14 13:53:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:25,485 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2023-02-14 13:53:25,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:53:25,485 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2023-02-14 13:53:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 13:53:25,486 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:25,486 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] [2023-02-14 13:53:25,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 13:53:25,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:25,687 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:25,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739053, now seen corresponding path program 1 times [2023-02-14 13:53:25,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:25,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4736184] [2023-02-14 13:53:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:25,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:25,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:25,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:53:25,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:25,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4736184] [2023-02-14 13:53:25,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4736184] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:25,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103968880] [2023-02-14 13:53:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:25,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:25,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:25,849 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 13:53:25,851 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 13:53:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:25,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 13:53:25,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:53:26,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:26,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:53:26,086 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 20 treesize of output 24 [2023-02-14 13:53:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:53:26,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103968880] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:53:26,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:53:26,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2023-02-14 13:53:26,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915777841] [2023-02-14 13:53:26,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:26,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 13:53:26,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:26,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 13:53:26,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-02-14 13:53:26,187 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 13:53:26,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:26,427 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2023-02-14 13:53:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 13:53:26,427 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2023-02-14 13:53:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:26,428 INFO L225 Difference]: With dead ends: 143 [2023-02-14 13:53:26,428 INFO L226 Difference]: Without dead ends: 143 [2023-02-14 13:53:26,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-02-14 13:53:26,429 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 21 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:26,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1191 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:53:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-14 13:53:26,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2023-02-14 13:53:26,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 130 states have internal predecessors, (139), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 13:53:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2023-02-14 13:53:26,431 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 29 [2023-02-14 13:53:26,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:26,431 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2023-02-14 13:53:26,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 13:53:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2023-02-14 13:53:26,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 13:53:26,432 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:26,432 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] [2023-02-14 13:53:26,439 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 13:53:26,637 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,SelfDestructingSolverStorable9 [2023-02-14 13:53:26,637 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:26,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598771, now seen corresponding path program 1 times [2023-02-14 13:53:26,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:26,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812864886] [2023-02-14 13:53:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:26,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:26,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:26,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:53:26,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:26,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812864886] [2023-02-14 13:53:26,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812864886] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:26,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:26,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 13:53:26,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352265152] [2023-02-14 13:53:26,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:26,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 13:53:26,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:26,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 13:53:26,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-14 13:53:26,738 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 13:53:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:26,936 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2023-02-14 13:53:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 13:53:26,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 30 [2023-02-14 13:53:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:26,937 INFO L225 Difference]: With dead ends: 136 [2023-02-14 13:53:26,937 INFO L226 Difference]: Without dead ends: 136 [2023-02-14 13:53:26,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-14 13:53:26,937 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 24 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:26,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 475 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:53:26,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-14 13:53:26,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2023-02-14 13:53:26,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 75 states have (on average 1.84) internal successors, (138), 129 states have internal predecessors, (138), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 13:53:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2023-02-14 13:53:26,940 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 30 [2023-02-14 13:53:26,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:26,940 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2023-02-14 13:53:26,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 13:53:26,940 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2023-02-14 13:53:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 13:53:26,941 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:26,941 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] [2023-02-14 13:53:26,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-14 13:53:26,941 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:26,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:26,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598772, now seen corresponding path program 1 times [2023-02-14 13:53:26,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:26,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527358888] [2023-02-14 13:53:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:26,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:27,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:27,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:53:27,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:27,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527358888] [2023-02-14 13:53:27,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527358888] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:27,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:27,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 13:53:27,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934296960] [2023-02-14 13:53:27,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:27,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 13:53:27,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:27,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 13:53:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-14 13:53:27,132 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 13:53:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:27,345 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2023-02-14 13:53:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 13:53:27,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 30 [2023-02-14 13:53:27,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:27,346 INFO L225 Difference]: With dead ends: 134 [2023-02-14 13:53:27,346 INFO L226 Difference]: Without dead ends: 134 [2023-02-14 13:53:27,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-14 13:53:27,346 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 20 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:27,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 505 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:53:27,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-02-14 13:53:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-02-14 13:53:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 75 states have (on average 1.8266666666666667) internal successors, (137), 128 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 13:53:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2023-02-14 13:53:27,349 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 30 [2023-02-14 13:53:27,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:27,349 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2023-02-14 13:53:27,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 13:53:27,349 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2023-02-14 13:53:27,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 13:53:27,350 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:27,350 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:27,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-14 13:53:27,350 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:27,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:27,350 INFO L85 PathProgramCache]: Analyzing trace with hash 939320083, now seen corresponding path program 1 times [2023-02-14 13:53:27,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:27,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338232646] [2023-02-14 13:53:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:27,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:27,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:27,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:27,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 13:53:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 13:53:27,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:27,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338232646] [2023-02-14 13:53:27,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338232646] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:27,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044652055] [2023-02-14 13:53:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:27,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:27,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:27,433 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 13:53:27,435 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 13:53:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:27,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 13:53:27,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:53:27,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:53:27,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044652055] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:27,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:53:27,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-02-14 13:53:27,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228885847] [2023-02-14 13:53:27,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:27,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 13:53:27,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:27,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 13:53:27,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:53:27,585 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:53:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:27,593 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2023-02-14 13:53:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 13:53:27,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2023-02-14 13:53:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:27,594 INFO L225 Difference]: With dead ends: 122 [2023-02-14 13:53:27,594 INFO L226 Difference]: Without dead ends: 122 [2023-02-14 13:53:27,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:53:27,594 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 107 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:27,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 153 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 13:53:27,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-14 13:53:27,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-02-14 13:53:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.8088235294117647) internal successors, (123), 117 states have internal predecessors, (123), 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 13:53:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2023-02-14 13:53:27,597 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 41 [2023-02-14 13:53:27,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:27,597 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2023-02-14 13:53:27,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:53:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2023-02-14 13:53:27,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 13:53:27,598 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:27,598 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:27,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-14 13:53:27,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:27,807 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:27,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:27,807 INFO L85 PathProgramCache]: Analyzing trace with hash -566913869, now seen corresponding path program 1 times [2023-02-14 13:53:27,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:27,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304666981] [2023-02-14 13:53:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:27,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:27,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:28,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:28,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 13:53:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 13:53:28,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:28,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304666981] [2023-02-14 13:53:28,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304666981] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:28,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815186193] [2023-02-14 13:53:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:28,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:28,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:28,147 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 13:53:28,150 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 13:53:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:28,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 13:53:28,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:28,315 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 13:53:28,325 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 13:53:28,339 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_1582 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_1582))))) is different from true [2023-02-14 13:53:28,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:28,394 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 13:53:28,411 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 13:53:28,415 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 13:53:28,431 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:53:28,432 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 13:53:28,474 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 13:53:28,485 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_1584 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_1584))))) is different from true [2023-02-14 13:53:28,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:28,528 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 13:53:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 21 not checked. [2023-02-14 13:53:28,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:28,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815186193] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:28,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:28,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-02-14 13:53:28,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556574352] [2023-02-14 13:53:28,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:28,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 13:53:28,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:28,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 13:53:28,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=125, Unknown=3, NotChecked=72, Total=240 [2023-02-14 13:53:28,585 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 13:53:28,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:28,840 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2023-02-14 13:53:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 13:53:28,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2023-02-14 13:53:28,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:28,841 INFO L225 Difference]: With dead ends: 132 [2023-02-14 13:53:28,841 INFO L226 Difference]: Without dead ends: 132 [2023-02-14 13:53:28,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=166, Unknown=3, NotChecked=84, Total=306 [2023-02-14 13:53:28,842 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 185 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:28,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 262 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 357 Invalid, 0 Unknown, 342 Unchecked, 0.2s Time] [2023-02-14 13:53:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-14 13:53:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2023-02-14 13:53:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 68 states have (on average 1.6911764705882353) internal successors, (115), 109 states have internal predecessors, (115), 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 13:53:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2023-02-14 13:53:28,844 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 43 [2023-02-14 13:53:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:28,844 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2023-02-14 13:53:28,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 13:53:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2023-02-14 13:53:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 13:53:28,845 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:28,845 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:28,852 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 13:53:29,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:29,046 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:29,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:29,046 INFO L85 PathProgramCache]: Analyzing trace with hash -566913868, now seen corresponding path program 1 times [2023-02-14 13:53:29,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:29,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17563499] [2023-02-14 13:53:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:29,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:29,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:29,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:29,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 13:53:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 13:53:29,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:29,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17563499] [2023-02-14 13:53:29,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17563499] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:29,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152161493] [2023-02-14 13:53:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:29,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:29,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:29,547 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 13:53:29,549 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 13:53:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:29,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 13:53:29,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:29,720 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 13:53:29,729 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 13:53:29,741 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1821 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1821) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-14 13:53:29,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:29,767 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 13:53:29,783 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 13:53:29,788 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_1822 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1822))))) is different from true [2023-02-14 13:53:29,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:29,813 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 13:53:29,853 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 13:53:29,861 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1823 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1823) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-14 13:53:29,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:29,899 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 13:53:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 21 not checked. [2023-02-14 13:53:29,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:31,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152161493] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:31,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:31,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2023-02-14 13:53:31,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018246123] [2023-02-14 13:53:31,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:31,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 13:53:31,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:31,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 13:53:31,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=147, Unknown=3, NotChecked=78, Total=272 [2023-02-14 13:53:31,987 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand has 15 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 13:53:32,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:32,322 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2023-02-14 13:53:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:53:32,322 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2023-02-14 13:53:32,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:32,323 INFO L225 Difference]: With dead ends: 124 [2023-02-14 13:53:32,323 INFO L226 Difference]: Without dead ends: 124 [2023-02-14 13:53:32,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=66, Invalid=215, Unknown=3, NotChecked=96, Total=380 [2023-02-14 13:53:32,323 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 261 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:32,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 302 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 474 Invalid, 0 Unknown, 375 Unchecked, 0.3s Time] [2023-02-14 13:53:32,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-14 13:53:32,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 106. [2023-02-14 13:53:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.5735294117647058) internal successors, (107), 101 states have internal predecessors, (107), 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 13:53:32,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2023-02-14 13:53:32,325 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 43 [2023-02-14 13:53:32,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:32,326 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2023-02-14 13:53:32,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 13:53:32,326 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2023-02-14 13:53:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 13:53:32,326 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:32,326 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:32,335 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 13:53:32,531 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,SelfDestructingSolverStorable14 [2023-02-14 13:53:32,532 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:32,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:32,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1119645598, now seen corresponding path program 1 times [2023-02-14 13:53:32,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:32,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947138463] [2023-02-14 13:53:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:32,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:32,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:32,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:32,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 13:53:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 13:53:32,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:32,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947138463] [2023-02-14 13:53:32,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947138463] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:32,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:32,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 13:53:32,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316099838] [2023-02-14 13:53:32,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:32,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 13:53:32,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:32,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 13:53:32,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:53:32,656 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 13:53:32,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:32,799 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2023-02-14 13:53:32,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:53:32,800 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2023-02-14 13:53:32,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:32,800 INFO L225 Difference]: With dead ends: 120 [2023-02-14 13:53:32,800 INFO L226 Difference]: Without dead ends: 120 [2023-02-14 13:53:32,801 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 13:53:32,801 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 77 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:32,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 282 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:32,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-14 13:53:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2023-02-14 13:53:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 97 states have internal predecessors, (103), 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 13:53:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2023-02-14 13:53:32,803 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 46 [2023-02-14 13:53:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:32,803 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2023-02-14 13:53:32,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 13:53:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2023-02-14 13:53:32,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 13:53:32,804 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:32,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:32,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-14 13:53:32,804 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:32,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1119645597, now seen corresponding path program 1 times [2023-02-14 13:53:32,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:32,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031791122] [2023-02-14 13:53:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:32,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:32,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:32,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:32,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 13:53:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 13:53:32,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:32,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031791122] [2023-02-14 13:53:32,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031791122] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:32,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:32,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 13:53:32,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95286974] [2023-02-14 13:53:32,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:32,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 13:53:32,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:32,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 13:53:32,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:53:32,964 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 13:53:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:33,094 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2023-02-14 13:53:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:53:33,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2023-02-14 13:53:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:33,095 INFO L225 Difference]: With dead ends: 98 [2023-02-14 13:53:33,095 INFO L226 Difference]: Without dead ends: 98 [2023-02-14 13:53:33,096 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 13:53:33,096 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 76 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:33,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 293 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-14 13:53:33,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-02-14 13:53:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 93 states have internal predecessors, (99), 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 13:53:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2023-02-14 13:53:33,098 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 46 [2023-02-14 13:53:33,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:33,098 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2023-02-14 13:53:33,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 13:53:33,098 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2023-02-14 13:53:33,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 13:53:33,098 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:33,098 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:33,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-14 13:53:33,098 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:33,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:33,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1119634675, now seen corresponding path program 1 times [2023-02-14 13:53:33,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:33,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823148398] [2023-02-14 13:53:33,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:33,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:33,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:33,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:33,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 13:53:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 13:53:33,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:33,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823148398] [2023-02-14 13:53:33,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823148398] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:33,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273995307] [2023-02-14 13:53:33,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:33,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:33,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:33,592 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:53:33,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 13:53:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:33,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-14 13:53:33,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:33,802 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 13:53:33,937 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 13:53:34,041 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_2367 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2367))) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)))) is different from true [2023-02-14 13:53:34,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:34,056 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 16 treesize of output 18 [2023-02-14 13:53:34,064 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-02-14 13:53:34,064 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 16 treesize of output 18 [2023-02-14 13:53:34,118 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 17 treesize of output 9 [2023-02-14 13:53:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-02-14 13:53:34,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:34,165 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_48| Int) (v_ArrVal_2373 (Array Int Int))) (or (= (select (store |c_#valid| |v_node_create_~temp~0#1.base_48| 1) (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_48| v_ArrVal_2373) |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) 1) (not (< |v_node_create_~temp~0#1.base_48| |c_#StackHeapBarrier|)))) is different from false [2023-02-14 13:53:34,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273995307] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:34,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:34,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2023-02-14 13:53:34,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486326565] [2023-02-14 13:53:34,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:34,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-14 13:53:34,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:34,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-14 13:53:34,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=573, Unknown=3, NotChecked=98, Total=756 [2023-02-14 13:53:34,168 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand has 27 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:53:34,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:34,699 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2023-02-14 13:53:34,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 13:53:34,700 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2023-02-14 13:53:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:34,701 INFO L225 Difference]: With dead ends: 115 [2023-02-14 13:53:34,701 INFO L226 Difference]: Without dead ends: 115 [2023-02-14 13:53:34,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=952, Unknown=5, NotChecked=130, Total=1260 [2023-02-14 13:53:34,701 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 432 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:34,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 476 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 679 Invalid, 3 Unknown, 120 Unchecked, 0.4s Time] [2023-02-14 13:53:34,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-14 13:53:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2023-02-14 13:53:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 68 states have (on average 1.4411764705882353) internal successors, (98), 92 states have internal predecessors, (98), 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 13:53:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2023-02-14 13:53:34,703 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 46 [2023-02-14 13:53:34,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:34,704 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2023-02-14 13:53:34,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:53:34,704 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2023-02-14 13:53:34,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 13:53:34,704 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:34,704 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:34,709 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 13:53:34,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-14 13:53:34,905 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:34,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:34,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1119634674, now seen corresponding path program 1 times [2023-02-14 13:53:34,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:34,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032248301] [2023-02-14 13:53:34,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:34,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:35,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:35,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:35,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 13:53:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:53:35,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:35,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032248301] [2023-02-14 13:53:35,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032248301] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:35,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633861859] [2023-02-14 13:53:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:35,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:35,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:35,841 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 13:53:35,872 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 13:53:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:36,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-14 13:53:36,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:36,078 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 13:53:36,374 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 13:53:36,377 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 7 treesize of output 3 [2023-02-14 13:53:36,539 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_2607 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_2607) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_2612 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2612))) (exists ((v_ArrVal_2613 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2613))))) is different from true [2023-02-14 13:53:36,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:36,593 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 16 treesize of output 18 [2023-02-14 13:53:36,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:36,598 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 25 treesize of output 25 [2023-02-14 13:53:36,606 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 13:53:36,606 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 13:53:36,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:36,610 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 13:53:36,668 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 13:53:36,670 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 13:53:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-02-14 13:53:36,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:36,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633861859] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:36,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:36,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2023-02-14 13:53:36,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515002451] [2023-02-14 13:53:36,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:36,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 13:53:36,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:36,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 13:53:36,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=963, Unknown=2, NotChecked=62, Total=1122 [2023-02-14 13:53:36,911 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:53:38,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:38,288 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2023-02-14 13:53:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 13:53:38,288 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2023-02-14 13:53:38,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:38,292 INFO L225 Difference]: With dead ends: 96 [2023-02-14 13:53:38,292 INFO L226 Difference]: Without dead ends: 96 [2023-02-14 13:53:38,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=220, Invalid=1759, Unknown=5, NotChecked=86, Total=2070 [2023-02-14 13:53:38,302 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 345 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:38,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 965 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1366 Invalid, 3 Unknown, 100 Unchecked, 0.8s Time] [2023-02-14 13:53:38,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-14 13:53:38,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-02-14 13:53:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 91 states have internal predecessors, (97), 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 13:53:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2023-02-14 13:53:38,309 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 46 [2023-02-14 13:53:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:38,310 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2023-02-14 13:53:38,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:53:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2023-02-14 13:53:38,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 13:53:38,310 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:38,310 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:38,317 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 13:53:38,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:38,516 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:38,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:38,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1999401721, now seen corresponding path program 1 times [2023-02-14 13:53:38,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:38,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645960377] [2023-02-14 13:53:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:38,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:38,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:38,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:38,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 13:53:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:53:38,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:38,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645960377] [2023-02-14 13:53:38,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645960377] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:38,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028053163] [2023-02-14 13:53:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:38,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:38,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:38,945 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 13:53:38,947 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 13:53:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-14 13:53:39,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:39,222 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 13:53:39,354 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 13:53:39,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:39,384 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 13:53:39,395 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:53:39,396 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 29 treesize of output 30 [2023-02-14 13:53:39,428 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 13:53:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 13:53:39,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:53:39,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028053163] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:39,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:53:39,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 26 [2023-02-14 13:53:39,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94823286] [2023-02-14 13:53:39,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:39,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 13:53:39,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:39,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 13:53:39,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2023-02-14 13:53:39,464 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 12 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:53:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:39,781 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2023-02-14 13:53:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 13:53:39,782 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2023-02-14 13:53:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:39,782 INFO L225 Difference]: With dead ends: 113 [2023-02-14 13:53:39,782 INFO L226 Difference]: Without dead ends: 113 [2023-02-14 13:53:39,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2023-02-14 13:53:39,783 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 223 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:39,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 329 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:53:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-14 13:53:39,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2023-02-14 13:53:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.3823529411764706) internal successors, (94), 88 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 13:53:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2023-02-14 13:53:39,786 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 51 [2023-02-14 13:53:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:39,786 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2023-02-14 13:53:39,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:53:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2023-02-14 13:53:39,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 13:53:39,787 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:39,787 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:39,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-14 13:53:39,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:39,993 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:39,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:39,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1999401722, now seen corresponding path program 1 times [2023-02-14 13:53:39,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:39,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160162801] [2023-02-14 13:53:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:39,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:40,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:40,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:40,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 13:53:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:53:40,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:40,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160162801] [2023-02-14 13:53:40,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160162801] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:40,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782386108] [2023-02-14 13:53:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:40,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:40,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:40,401 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 13:53:40,403 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 13:53:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:40,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-14 13:53:40,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:40,828 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 13:53:40,902 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_3170 (Array Int Int))) (and (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_3170) |c_#memory_$Pointer$.base|) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|))) is different from true [2023-02-14 13:53:40,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:40,927 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 13:53:40,953 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 13:53:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-02-14 13:53:40,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:41,041 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3175 (Array Int Int)) (|v_node_create_~temp~0#1.base_54| Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_54| v_ArrVal_3175) |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) (or (not (< |v_node_create_~temp~0#1.base_54| |c_#StackHeapBarrier|)) (<= (+ .cse0 1) 0) (<= 1 .cse0)))) is different from false [2023-02-14 13:53:41,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782386108] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:41,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:41,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2023-02-14 13:53:41,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559713765] [2023-02-14 13:53:41,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:41,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 13:53:41,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:41,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 13:53:41,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=571, Unknown=2, NotChecked=98, Total=756 [2023-02-14 13:53:41,043 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:53:41,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:41,498 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2023-02-14 13:53:41,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 13:53:41,498 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 4 states have call successors, (6), 3 states have call predecessors, (6), 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 13:53:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:41,498 INFO L225 Difference]: With dead ends: 90 [2023-02-14 13:53:41,498 INFO L226 Difference]: Without dead ends: 90 [2023-02-14 13:53:41,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=901, Unknown=2, NotChecked=126, Total=1190 [2023-02-14 13:53:41,499 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 304 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:41,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 692 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 438 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2023-02-14 13:53:41,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-14 13:53:41,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-02-14 13:53:41,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 85 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 13:53:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2023-02-14 13:53:41,501 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 51 [2023-02-14 13:53:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:41,501 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2023-02-14 13:53:41,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 13:53:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2023-02-14 13:53:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 13:53:41,501 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:41,502 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:41,520 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 13:53:41,707 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,SelfDestructingSolverStorable20 [2023-02-14 13:53:41,707 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:41,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:41,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1685641326, now seen corresponding path program 1 times [2023-02-14 13:53:41,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:41,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557628983] [2023-02-14 13:53:41,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:41,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 13:53:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 13:53:41,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:41,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557628983] [2023-02-14 13:53:41,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557628983] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:41,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:41,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 13:53:41,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295608011] [2023-02-14 13:53:41,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:41,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 13:53:41,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:41,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 13:53:41,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:53:41,801 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 13:53:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:41,937 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2023-02-14 13:53:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:53:41,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-14 13:53:41,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:41,939 INFO L225 Difference]: With dead ends: 107 [2023-02-14 13:53:41,939 INFO L226 Difference]: Without dead ends: 107 [2023-02-14 13:53:41,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-02-14 13:53:41,939 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 57 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:41,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 305 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:41,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-14 13:53:41,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2023-02-14 13:53:41,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 84 states have internal predecessors, (89), 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 13:53:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2023-02-14 13:53:41,941 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 52 [2023-02-14 13:53:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:41,941 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2023-02-14 13:53:41,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 13:53:41,942 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2023-02-14 13:53:41,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 13:53:41,942 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:41,942 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:41,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-14 13:53:41,942 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:41,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:41,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1685641325, now seen corresponding path program 1 times [2023-02-14 13:53:41,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:41,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544487421] [2023-02-14 13:53:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:41,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:42,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:42,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:42,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 13:53:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 13:53:42,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:42,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544487421] [2023-02-14 13:53:42,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544487421] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:53:42,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:53:42,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 13:53:42,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108126148] [2023-02-14 13:53:42,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:53:42,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 13:53:42,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:42,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 13:53:42,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:53:42,148 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 13:53:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:42,270 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2023-02-14 13:53:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:53:42,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-14 13:53:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:42,271 INFO L225 Difference]: With dead ends: 88 [2023-02-14 13:53:42,271 INFO L226 Difference]: Without dead ends: 88 [2023-02-14 13:53:42,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-02-14 13:53:42,272 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 60 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:42,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 303 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:53:42,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-14 13:53:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-02-14 13:53:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.353846153846154) internal successors, (88), 83 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 13:53:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2023-02-14 13:53:42,274 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 52 [2023-02-14 13:53:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:42,274 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2023-02-14 13:53:42,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 13:53:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2023-02-14 13:53:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 13:53:42,275 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:42,275 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:42,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-14 13:53:42,275 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:42,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:42,275 INFO L85 PathProgramCache]: Analyzing trace with hash -715273504, now seen corresponding path program 1 times [2023-02-14 13:53:42,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:42,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981935106] [2023-02-14 13:53:42,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:42,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:42,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:42,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:42,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 13:53:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:53:43,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:43,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981935106] [2023-02-14 13:53:43,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981935106] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:43,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574840056] [2023-02-14 13:53:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:43,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:43,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:43,507 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 13:53:43,509 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 13:53:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:43,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 87 conjunts are in the unsatisfiable core [2023-02-14 13:53:43,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:43,769 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 13:53:43,942 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 13:53:44,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:53:44,055 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 29 treesize of output 32 [2023-02-14 13:53:44,059 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 14 [2023-02-14 13:53:44,065 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 13:53:44,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:53:44,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:44,324 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-02-14 13:53:44,324 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 37 treesize of output 36 [2023-02-14 13:53:44,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:44,328 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 28 treesize of output 23 [2023-02-14 13:53:44,349 INFO L321 Elim1Store]: treesize reduction 120, result has 31.4 percent of original size [2023-02-14 13:53:44,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 64 [2023-02-14 13:53:44,432 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 19 [2023-02-14 13:53:44,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:53:44,556 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 45 treesize of output 34 [2023-02-14 13:53:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:53:44,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:44,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574840056] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:44,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:44,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 38 [2023-02-14 13:53:44,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464558781] [2023-02-14 13:53:44,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:44,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-14 13:53:44,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:44,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-14 13:53:44,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1593, Unknown=0, NotChecked=0, Total=1722 [2023-02-14 13:53:44,790 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 39 states, 36 states have (on average 2.138888888888889) internal successors, (77), 34 states have internal predecessors, (77), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-14 13:53:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:46,440 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2023-02-14 13:53:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 13:53:46,440 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 2.138888888888889) internal successors, (77), 34 states have internal predecessors, (77), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 53 [2023-02-14 13:53:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:46,441 INFO L225 Difference]: With dead ends: 105 [2023-02-14 13:53:46,441 INFO L226 Difference]: Without dead ends: 105 [2023-02-14 13:53:46,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=409, Invalid=3131, Unknown=0, NotChecked=0, Total=3540 [2023-02-14 13:53:46,442 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 538 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:46,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 953 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 13:53:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-14 13:53:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2023-02-14 13:53:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 82 states have internal predecessors, (87), 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 13:53:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2023-02-14 13:53:46,444 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 53 [2023-02-14 13:53:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:46,445 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2023-02-14 13:53:46,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 2.138888888888889) internal successors, (77), 34 states have internal predecessors, (77), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-14 13:53:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2023-02-14 13:53:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 13:53:46,445 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:46,445 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:46,453 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 13:53:46,653 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,SelfDestructingSolverStorable23 [2023-02-14 13:53:46,653 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:46,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:46,654 INFO L85 PathProgramCache]: Analyzing trace with hash -715273503, now seen corresponding path program 1 times [2023-02-14 13:53:46,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:46,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156401570] [2023-02-14 13:53:46,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:46,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:47,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:47,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:47,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 13:53:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:53:48,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156401570] [2023-02-14 13:53:48,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156401570] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163585765] [2023-02-14 13:53:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:48,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:48,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:48,443 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 13:53:48,445 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 13:53:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:48,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-14 13:53:48,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:48,754 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 13:53:49,027 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 13:53:49,031 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 13:53:49,198 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-02-14 13:53:49,198 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 81 treesize of output 44 [2023-02-14 13:53:49,209 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-02-14 13:53:49,209 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 31 treesize of output 25 [2023-02-14 13:53:49,229 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 13:53:49,236 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 13:53:49,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:53:49,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:49,573 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:53:49,573 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 87 treesize of output 83 [2023-02-14 13:53:49,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:49,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:49,582 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-14 13:53:49,583 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 78 treesize of output 71 [2023-02-14 13:53:49,609 INFO L321 Elim1Store]: treesize reduction 39, result has 48.7 percent of original size [2023-02-14 13:53:49,609 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 42 treesize of output 62 [2023-02-14 13:53:49,629 INFO L321 Elim1Store]: treesize reduction 34, result has 44.3 percent of original size [2023-02-14 13:53:49,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2023-02-14 13:53:49,807 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-02-14 13:53:49,807 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 87 treesize of output 50 [2023-02-14 13:53:49,833 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-02-14 13:53:49,834 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 44 treesize of output 28 [2023-02-14 13:53:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:53:49,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:53:50,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163585765] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:50,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:53:50,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 45 [2023-02-14 13:53:50,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554255122] [2023-02-14 13:53:50,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:53:50,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-14 13:53:50,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:53:50,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-14 13:53:50,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2388, Unknown=1, NotChecked=0, Total=2550 [2023-02-14 13:53:50,360 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 46 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 40 states have internal predecessors, (93), 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 13:53:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:53:52,410 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2023-02-14 13:53:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 13:53:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 40 states have internal predecessors, (93), 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 53 [2023-02-14 13:53:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:53:52,411 INFO L225 Difference]: With dead ends: 86 [2023-02-14 13:53:52,411 INFO L226 Difference]: Without dead ends: 86 [2023-02-14 13:53:52,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=361, Invalid=4330, Unknown=1, NotChecked=0, Total=4692 [2023-02-14 13:53:52,412 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 288 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:53:52,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 1055 Invalid, 1734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1724 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 13:53:52,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-14 13:53:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-02-14 13:53:52,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.323076923076923) internal successors, (86), 81 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 13:53:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2023-02-14 13:53:52,414 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 53 [2023-02-14 13:53:52,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:53:52,414 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2023-02-14 13:53:52,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 40 states have internal predecessors, (93), 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 13:53:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2023-02-14 13:53:52,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-14 13:53:52,415 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:53:52,415 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:53:52,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-14 13:53:52,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:52,632 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:53:52,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:53:52,632 INFO L85 PathProgramCache]: Analyzing trace with hash 821274968, now seen corresponding path program 1 times [2023-02-14 13:53:52,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:53:52,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952768304] [2023-02-14 13:53:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:52,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:53:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:54,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:53:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:54,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:53:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:54,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 13:53:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:53:54,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:53:54,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952768304] [2023-02-14 13:53:54,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952768304] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:53:54,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375381387] [2023-02-14 13:53:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:53:54,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:53:54,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:53:54,411 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 13:53:54,412 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 13:53:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:53:54,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 114 conjunts are in the unsatisfiable core [2023-02-14 13:53:54,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:53:54,670 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 13:53:54,703 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 13:53:54,806 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:53:54,807 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 13:53:54,894 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 13:53:55,142 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 13:53:55,310 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-02-14 13:53:55,310 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 35 treesize of output 16 [2023-02-14 13:53:55,313 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 13:53:55,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:55,663 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:53:55,663 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 43 treesize of output 47 [2023-02-14 13:53:55,672 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 13:53:55,672 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 13:53:55,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:55,678 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 25 treesize of output 27 [2023-02-14 13:53:56,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2023-02-14 13:53:56,334 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2023-02-14 13:53:56,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 39 [2023-02-14 13:53:56,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:56,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:56,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2023-02-14 13:53:56,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:56,445 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 25 treesize of output 25 [2023-02-14 13:53:56,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:56,471 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 25 treesize of output 25 [2023-02-14 13:53:56,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:56,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:56,488 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:53:56,489 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 23 treesize of output 32 [2023-02-14 13:53:56,498 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 13:53:56,560 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 25 treesize of output 25 [2023-02-14 13:53:56,563 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 13:53:56,636 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:53:56,637 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 45 treesize of output 44 [2023-02-14 13:53:56,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:53:56,648 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 33 treesize of output 33 [2023-02-14 13:53:56,710 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 32 treesize of output 20 [2023-02-14 13:53:56,713 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 13:53:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:53:56,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:55:07,949 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:55:07,949 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 203 treesize of output 207 [2023-02-14 13:55:08,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375381387] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:55:08,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:55:08,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 64 [2023-02-14 13:55:08,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024315870] [2023-02-14 13:55:08,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:55:08,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-14 13:55:08,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:55:08,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-14 13:55:08,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=5886, Unknown=180, NotChecked=0, Total=6320 [2023-02-14 13:55:08,925 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 65 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 56 states have internal predecessors, (103), 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 13:55:19,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:55:19,350 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2023-02-14 13:55:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 13:55:19,351 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 56 states have internal predecessors, (103), 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 58 [2023-02-14 13:55:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:55:19,351 INFO L225 Difference]: With dead ends: 104 [2023-02-14 13:55:19,351 INFO L226 Difference]: Without dead ends: 104 [2023-02-14 13:55:19,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2637 ImplicationChecksByTransitivity, 80.5s TimeCoverageRelationStatistics Valid=723, Invalid=10436, Unknown=183, NotChecked=0, Total=11342 [2023-02-14 13:55:19,354 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 970 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 61 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-02-14 13:55:19,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 1019 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2253 Invalid, 3 Unknown, 0 Unchecked, 3.3s Time] [2023-02-14 13:55:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-14 13:55:19,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2023-02-14 13:55:19,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 79 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 13:55:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2023-02-14 13:55:19,356 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 58 [2023-02-14 13:55:19,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:55:19,356 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2023-02-14 13:55:19,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 56 states have internal predecessors, (103), 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 13:55:19,356 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2023-02-14 13:55:19,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-14 13:55:19,357 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:55:19,357 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:55:19,367 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 13:55:19,563 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,SelfDestructingSolverStorable25 [2023-02-14 13:55:19,563 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-02-14 13:55:19,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:55:19,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1028736951, now seen corresponding path program 1 times [2023-02-14 13:55:19,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:55:19,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461132108] [2023-02-14 13:55:19,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:55:19,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:55:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:22,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:55:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:22,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:55:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:22,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-14 13:55:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:55:24,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:55:24,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461132108] [2023-02-14 13:55:24,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461132108] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:55:24,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160337141] [2023-02-14 13:55:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:55:24,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:55:24,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:55:24,945 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 13:55:24,948 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 13:55:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:55:25,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 136 conjunts are in the unsatisfiable core [2023-02-14 13:55:25,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:55:25,224 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 13:55:25,318 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 13:55:25,547 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:55:25,548 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 13:55:25,761 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 13:55:26,647 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 13:55:27,115 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-02-14 13:55:27,115 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 54 treesize of output 21 [2023-02-14 13:55:27,121 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 13:55:27,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:55:27,771 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 13:55:28,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:28,218 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:55:28,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 60 [2023-02-14 13:55:28,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:28,233 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 44 treesize of output 44 [2023-02-14 13:55:28,272 INFO L321 Elim1Store]: treesize reduction 34, result has 44.3 percent of original size [2023-02-14 13:55:28,272 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 3 case distinctions, treesize of input 34 treesize of output 36 [2023-02-14 13:55:30,211 INFO L321 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2023-02-14 13:55:30,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 47 [2023-02-14 13:55:30,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2023-02-14 13:55:30,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:30,251 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 16 treesize of output 18 [2023-02-14 13:55:30,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:30,503 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 13:55:30,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:30,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:30,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 44 [2023-02-14 13:55:30,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:30,549 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 13:55:30,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:30,786 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 43 treesize of output 39 [2023-02-14 13:55:30,791 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 24 treesize of output 12 [2023-02-14 13:55:30,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:30,807 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 13:55:30,814 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 16 treesize of output 18 [2023-02-14 13:55:31,058 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 13:55:31,065 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 13:55:31,075 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 16 treesize of output 18 [2023-02-14 13:55:31,317 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-14 13:55:31,318 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 63 [2023-02-14 13:55:31,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:31,335 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 39 treesize of output 34 [2023-02-14 13:55:31,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:55:31,342 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 25 treesize of output 25 [2023-02-14 13:55:31,578 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 30 treesize of output 18 [2023-02-14 13:55:31,583 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 22 treesize of output 10 [2023-02-14 13:55:31,786 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 13:55:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:55:31,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:55:32,040 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4719 (Array Int Int)) (v_ArrVal_4721 Int) (v_ArrVal_4722 (Array Int Int))) (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) (+ |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4) v_ArrVal_4721)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_4722) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_4719) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8)))) is different from false [2023-02-14 13:55:32,067 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4718 (Array Int Int)) (v_ArrVal_4719 (Array Int Int)) (v_ArrVal_4721 Int) (v_ArrVal_4722 (Array Int Int)) (v_ArrVal_4716 (Array Int Int)) (v_ArrVal_4717 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_4718))) (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) (+ |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4) v_ArrVal_4721))) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_4717) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_4722) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_4716) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_4719) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8)) |c_ULTIMATE.start_main_~uneq~0#1|)) is different from false [2023-02-14 13:55:32,080 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4718 (Array Int Int)) (v_ArrVal_4719 (Array Int Int)) (v_ArrVal_4721 Int) (v_ArrVal_4722 (Array Int Int)) (v_ArrVal_4713 (Array Int Int)) (v_ArrVal_4714 (Array Int Int)) (v_ArrVal_4715 (Array Int Int)) (v_ArrVal_4716 (Array Int Int)) (v_ArrVal_4717 (Array Int Int))) (= (select (select (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_4714) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_4718))) (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) (+ |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4) v_ArrVal_4721))) (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_4713) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_4717) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_4722) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_4715) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_4716) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_4719) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8)) |c_ULTIMATE.start_main_~uneq~0#1|)) is different from false [2023-02-14 13:55:35,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:55:35,425 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 250 [2023-02-14 13:55:35,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:55:35,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 544452 treesize of output 539470 [2023-02-14 13:55:35,913 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 623874 treesize of output 563458 [2023-02-14 13:55:36,365 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 605698 treesize of output 546306 [2023-02-14 13:55:36,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 612898 treesize of output 592674