./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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-ext3-properties/sll_nondet_insert-2.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 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:42:07,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:42:07,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:42:07,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:42:07,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:42:07,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:42:07,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:42:07,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:42:07,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:42:07,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:42:07,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:42:07,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:42:07,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:42:07,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:42:07,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:42:07,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:42:07,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:42:07,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:42:07,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:42:07,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:42:07,594 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:42:07,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:42:07,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:42:07,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:42:07,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:42:07,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:42:07,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:42:07,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:42:07,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:42:07,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:42:07,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:42:07,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:42:07,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:42:07,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:42:07,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:42:07,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:42:07,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:42:07,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:42:07,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:42:07,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:42:07,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:42:07,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:42:07,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 06:42:07,651 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:42:07,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:42:07,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:42:07,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:42:07,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:42:07,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:42:07,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:42:07,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:42:07,653 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:42:07,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:42:07,654 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:42:07,654 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:42:07,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:42:07,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:42:07,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:42:07,654 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:42:07,655 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:42:07,655 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:42:07,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:42:07,655 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:42:07,655 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:42:07,655 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:42:07,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:42:07,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:42:07,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:42:07,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:42:07,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:42:07,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:42:07,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 06:42:07,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 06:42:07,657 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2022-07-23 06:42:07,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:42:07,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:42:07,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:42:07,882 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:42:07,882 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:42:07,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2022-07-23 06:42:07,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a478068eb/223b28f90e7b41f08040086d87232477/FLAG6c3951f6d [2022-07-23 06:42:08,344 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:42:08,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2022-07-23 06:42:08,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a478068eb/223b28f90e7b41f08040086d87232477/FLAG6c3951f6d [2022-07-23 06:42:08,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a478068eb/223b28f90e7b41f08040086d87232477 [2022-07-23 06:42:08,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:42:08,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:42:08,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:42:08,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:42:08,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:42:08,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:42:08" (1/1) ... [2022-07-23 06:42:08,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c84c43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:42:08, skipping insertion in model container [2022-07-23 06:42:08,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:42:08" (1/1) ... [2022-07-23 06:42:08,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:42:08,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:42:08,652 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2022-07-23 06:42:08,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:42:08,660 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 06:42:08,710 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2022-07-23 06:42:08,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:42:08,733 INFO L208 MainTranslator]: Completed translation [2022-07-23 06:42:08,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:42:08 WrapperNode [2022-07-23 06:42:08,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:42:08,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 06:42:08,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 06:42:08,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 06:42:08,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:42:08" (1/1) ... [2022-07-23 06:42:08,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:42:08" (1/1) ... [2022-07-23 06:42:08,768 INFO L137 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 132 [2022-07-23 06:42:08,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 06:42:08,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 06:42:08,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 06:42:08,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 06:42:08,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:42:08" (1/1) ... [2022-07-23 06:42:08,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:42:08" (1/1) ... [2022-07-23 06:42:08,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:42:08" (1/1) ... [2022-07-23 06:42:08,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:42:08" (1/1) ... [2022-07-23 06:42:08,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:42:08" (1/1) ... [2022-07-23 06:42:08,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:42:08" (1/1) ... [2022-07-23 06:42:08,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:42:08" (1/1) ... [2022-07-23 06:42:08,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 06:42:08,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 06:42:08,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 06:42:08,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 06:42:08,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:42:08" (1/1) ... [2022-07-23 06:42:08,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:42:08,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:08,834 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) [2022-07-23 06:42:08,836 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 [2022-07-23 06:42:08,878 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-07-23 06:42:08,878 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-07-23 06:42:08,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 06:42:08,878 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2022-07-23 06:42:08,878 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2022-07-23 06:42:08,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 06:42:08,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 06:42:08,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 06:42:08,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 06:42:08,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 06:42:08,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 06:42:08,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-23 06:42:08,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 06:42:08,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 06:42:09,007 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 06:42:09,008 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 06:42:09,057 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-07-23 06:42:09,304 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 06:42:09,312 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 06:42:09,312 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-23 06:42:09,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:42:09 BoogieIcfgContainer [2022-07-23 06:42:09,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 06:42:09,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 06:42:09,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 06:42:09,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 06:42:09,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 06:42:08" (1/3) ... [2022-07-23 06:42:09,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa55c9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:42:09, skipping insertion in model container [2022-07-23 06:42:09,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:42:08" (2/3) ... [2022-07-23 06:42:09,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa55c9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:42:09, skipping insertion in model container [2022-07-23 06:42:09,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:42:09" (3/3) ... [2022-07-23 06:42:09,320 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2022-07-23 06:42:09,330 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 06:42:09,330 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2022-07-23 06:42:09,361 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 06:42:09,365 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=FINITE_AUTOMATA, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@570bb1cf, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@439c1b66 [2022-07-23 06:42:09,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-07-23 06:42:09,368 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 80 states have internal predecessors, (96), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:09,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 06:42:09,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:09,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:09,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:09,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:09,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1721266506, now seen corresponding path program 1 times [2022-07-23 06:42:09,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:09,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163083248] [2022-07-23 06:42:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:09,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:09,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:42:09,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:09,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163083248] [2022-07-23 06:42:09,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163083248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:09,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:42:09,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:42:09,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509371744] [2022-07-23 06:42:09,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:09,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-23 06:42:09,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:09,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-23 06:42:09,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-23 06:42:09,527 INFO L87 Difference]: Start difference. First operand has 86 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 80 states have internal predecessors, (96), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-07-23 06:42:09,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:09,544 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2022-07-23 06:42:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-23 06:42:09,545 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 13 [2022-07-23 06:42:09,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:09,551 INFO L225 Difference]: With dead ends: 86 [2022-07-23 06:42:09,551 INFO L226 Difference]: Without dead ends: 80 [2022-07-23 06:42:09,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-23 06:42:09,557 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:09,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:42:09,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-23 06:42:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-07-23 06:42:09,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 75 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:09,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2022-07-23 06:42:09,589 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 13 [2022-07-23 06:42:09,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:09,590 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2022-07-23 06:42:09,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-07-23 06:42:09,591 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2022-07-23 06:42:09,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 06:42:09,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:09,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:09,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 06:42:09,593 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:09,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:09,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1583427249, now seen corresponding path program 1 times [2022-07-23 06:42:09,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:09,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828377790] [2022-07-23 06:42:09,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:09,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:09,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:42:09,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:09,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828377790] [2022-07-23 06:42:09,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828377790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:09,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:42:09,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:42:09,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937489290] [2022-07-23 06:42:09,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:09,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:42:09,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:09,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:42:09,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:42:09,693 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-07-23 06:42:09,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:09,791 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2022-07-23 06:42:09,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:42:09,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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 15 [2022-07-23 06:42:09,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:09,793 INFO L225 Difference]: With dead ends: 141 [2022-07-23 06:42:09,793 INFO L226 Difference]: Without dead ends: 141 [2022-07-23 06:42:09,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:42:09,794 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 65 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:09,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 162 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:42:09,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-23 06:42:09,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 79. [2022-07-23 06:42:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 51 states have (on average 1.607843137254902) internal successors, (82), 74 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2022-07-23 06:42:09,804 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 15 [2022-07-23 06:42:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:09,804 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2022-07-23 06:42:09,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-07-23 06:42:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2022-07-23 06:42:09,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 06:42:09,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:09,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:09,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 06:42:09,806 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:09,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:09,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1583427248, now seen corresponding path program 1 times [2022-07-23 06:42:09,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:09,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693296708] [2022-07-23 06:42:09,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:09,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:09,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:42:09,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:09,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693296708] [2022-07-23 06:42:09,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693296708] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:09,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:42:09,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:42:09,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622295202] [2022-07-23 06:42:09,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:09,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:42:09,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:09,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:42:09,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:42:09,859 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-07-23 06:42:09,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:09,926 INFO L93 Difference]: Finished difference Result 142 states and 158 transitions. [2022-07-23 06:42:09,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:42:09,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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 15 [2022-07-23 06:42:09,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:09,927 INFO L225 Difference]: With dead ends: 142 [2022-07-23 06:42:09,927 INFO L226 Difference]: Without dead ends: 142 [2022-07-23 06:42:09,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:42:09,929 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 67 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:09,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 197 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:42:09,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-23 06:42:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 78. [2022-07-23 06:42:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.588235294117647) internal successors, (81), 73 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2022-07-23 06:42:09,934 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 15 [2022-07-23 06:42:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:09,935 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2022-07-23 06:42:09,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-07-23 06:42:09,935 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2022-07-23 06:42:09,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 06:42:09,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:09,936 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:09,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 06:42:09,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:09,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:09,936 INFO L85 PathProgramCache]: Analyzing trace with hash 840693873, now seen corresponding path program 1 times [2022-07-23 06:42:09,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:09,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311662004] [2022-07-23 06:42:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:09,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:09,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:10,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-23 06:42:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:42:10,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:10,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311662004] [2022-07-23 06:42:10,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311662004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:10,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694293890] [2022-07-23 06:42:10,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:10,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:10,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:10,056 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) [2022-07-23 06:42:10,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 06:42:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:10,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 06:42:10,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:42:10,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:42:10,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694293890] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:10,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 06:42:10,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-07-23 06:42:10,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425116361] [2022-07-23 06:42:10,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:10,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:42:10,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:10,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:42:10,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-23 06:42:10,212 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:10,256 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2022-07-23 06:42:10,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:42:10,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-23 06:42:10,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:10,258 INFO L225 Difference]: With dead ends: 80 [2022-07-23 06:42:10,258 INFO L226 Difference]: Without dead ends: 80 [2022-07-23 06:42:10,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:42:10,265 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 3 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:10,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 453 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:42:10,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-23 06:42:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-07-23 06:42:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 75 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2022-07-23 06:42:10,276 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 26 [2022-07-23 06:42:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:10,277 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2022-07-23 06:42:10,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2022-07-23 06:42:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 06:42:10,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:10,278 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:10,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-23 06:42:10,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:10,496 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:10,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:10,496 INFO L85 PathProgramCache]: Analyzing trace with hash -838491758, now seen corresponding path program 1 times [2022-07-23 06:42:10,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:10,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013534379] [2022-07-23 06:42:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:10,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:10,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:10,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-23 06:42:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:42:10,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:10,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013534379] [2022-07-23 06:42:10,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013534379] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:10,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669823296] [2022-07-23 06:42:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:10,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:10,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:10,600 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) [2022-07-23 06:42:10,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-23 06:42:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:10,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 06:42:10,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:42:10,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:42:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:42:10,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669823296] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:42:10,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 06:42:10,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-07-23 06:42:10,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635798024] [2022-07-23 06:42:10,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 06:42:10,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 06:42:10,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:10,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 06:42:10,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-07-23 06:42:10,843 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:42:11,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:11,077 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2022-07-23 06:42:11,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 06:42:11,080 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2022-07-23 06:42:11,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:11,082 INFO L225 Difference]: With dead ends: 103 [2022-07-23 06:42:11,082 INFO L226 Difference]: Without dead ends: 103 [2022-07-23 06:42:11,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-07-23 06:42:11,083 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 25 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:11,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 930 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:42:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-23 06:42:11,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2022-07-23 06:42:11,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 80 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) [2022-07-23 06:42:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2022-07-23 06:42:11,088 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 31 [2022-07-23 06:42:11,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:11,088 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2022-07-23 06:42:11,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:42:11,089 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2022-07-23 06:42:11,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 06:42:11,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:11,090 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:11,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-23 06:42:11,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:11,303 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:11,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:11,304 INFO L85 PathProgramCache]: Analyzing trace with hash -686979823, now seen corresponding path program 2 times [2022-07-23 06:42:11,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:11,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931602371] [2022-07-23 06:42:11,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:11,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:11,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:11,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-23 06:42:11,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:11,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931602371] [2022-07-23 06:42:11,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931602371] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:11,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589756550] [2022-07-23 06:42:11,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:42:11,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:11,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:11,416 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) [2022-07-23 06:42:11,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-23 06:42:11,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:42:11,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:42:11,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 06:42:11,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:11,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:42:11,521 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 06:42:11,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-23 06:42:11,540 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:42:11,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 06:42:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-23 06:42:11,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:42:11,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589756550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:11,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 06:42:11,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-23 06:42:11,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705803874] [2022-07-23 06:42:11,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:11,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:42:11,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:11,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:42:11,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:42:11,598 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:11,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:11,628 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2022-07-23 06:42:11,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:42:11,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-07-23 06:42:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:11,629 INFO L225 Difference]: With dead ends: 102 [2022-07-23 06:42:11,629 INFO L226 Difference]: Without dead ends: 102 [2022-07-23 06:42:11,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:42:11,630 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 65 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:11,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 111 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-07-23 06:42:11,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-23 06:42:11,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2022-07-23 06:42:11,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 64 states have (on average 1.46875) internal successors, (94), 84 states have internal predecessors, (94), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:11,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2022-07-23 06:42:11,641 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 36 [2022-07-23 06:42:11,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:11,641 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2022-07-23 06:42:11,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:11,642 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2022-07-23 06:42:11,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 06:42:11,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:11,642 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:11,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-23 06:42:11,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:11,859 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:11,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:11,859 INFO L85 PathProgramCache]: Analyzing trace with hash -686979822, now seen corresponding path program 1 times [2022-07-23 06:42:11,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:11,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195815574] [2022-07-23 06:42:11,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:11,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:11,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:11,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-23 06:42:11,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195815574] [2022-07-23 06:42:11,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195815574] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:11,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720601158] [2022-07-23 06:42:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:11,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:11,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:11,924 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) [2022-07-23 06:42:11,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-23 06:42:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:11,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-23 06:42:11,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:12,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:42:12,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:42:12,033 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:42:12,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 [2022-07-23 06:42:12,048 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:42:12,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-23 06:42:12,103 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:42:12,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:42:12,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:42:12,201 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:42:12,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-07-23 06:42:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:42:12,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:42:12,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-23 06:42:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:42:12,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720601158] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:42:12,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 06:42:12,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 9] total 19 [2022-07-23 06:42:12,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482584233] [2022-07-23 06:42:12,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 06:42:12,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 06:42:12,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:12,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 06:42:12,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-07-23 06:42:12,573 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:42:12,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:12,845 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2022-07-23 06:42:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 06:42:12,846 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-07-23 06:42:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:12,846 INFO L225 Difference]: With dead ends: 100 [2022-07-23 06:42:12,846 INFO L226 Difference]: Without dead ends: 100 [2022-07-23 06:42:12,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2022-07-23 06:42:12,847 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 369 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:12,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 426 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 226 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-07-23 06:42:12,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-23 06:42:12,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2022-07-23 06:42:12,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.4375) internal successors, (92), 82 states have internal predecessors, (92), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:12,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2022-07-23 06:42:12,864 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 36 [2022-07-23 06:42:12,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:12,864 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2022-07-23 06:42:12,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:42:12,864 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2022-07-23 06:42:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-23 06:42:12,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:12,865 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:12,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-23 06:42:13,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:13,066 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:13,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:13,066 INFO L85 PathProgramCache]: Analyzing trace with hash -296648915, now seen corresponding path program 1 times [2022-07-23 06:42:13,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:13,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409447860] [2022-07-23 06:42:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:13,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:13,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:13,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-23 06:42:13,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:13,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409447860] [2022-07-23 06:42:13,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409447860] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:13,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:42:13,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 06:42:13,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323761404] [2022-07-23 06:42:13,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:13,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:42:13,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:13,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:42:13,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:42:13,137 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:13,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:13,299 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2022-07-23 06:42:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 06:42:13,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-07-23 06:42:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:13,301 INFO L225 Difference]: With dead ends: 166 [2022-07-23 06:42:13,301 INFO L226 Difference]: Without dead ends: 166 [2022-07-23 06:42:13,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-23 06:42:13,301 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 468 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:13,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 264 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:42:13,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-23 06:42:13,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 93. [2022-07-23 06:42:13,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.4492753623188406) internal successors, (100), 87 states have internal predecessors, (100), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:13,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2022-07-23 06:42:13,305 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 39 [2022-07-23 06:42:13,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:13,305 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2022-07-23 06:42:13,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:13,305 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2022-07-23 06:42:13,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-23 06:42:13,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:13,305 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:13,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-23 06:42:13,306 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:13,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:13,306 INFO L85 PathProgramCache]: Analyzing trace with hash -296648914, now seen corresponding path program 1 times [2022-07-23 06:42:13,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:13,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574327286] [2022-07-23 06:42:13,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:13,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:13,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:13,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-23 06:42:13,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:13,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574327286] [2022-07-23 06:42:13,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574327286] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:13,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:42:13,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 06:42:13,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16934772] [2022-07-23 06:42:13,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:13,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:42:13,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:13,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:42:13,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:42:13,400 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:13,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:13,608 INFO L93 Difference]: Finished difference Result 156 states and 172 transitions. [2022-07-23 06:42:13,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 06:42:13,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-07-23 06:42:13,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:13,610 INFO L225 Difference]: With dead ends: 156 [2022-07-23 06:42:13,610 INFO L226 Difference]: Without dead ends: 156 [2022-07-23 06:42:13,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-23 06:42:13,610 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 488 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:13,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 248 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:42:13,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-23 06:42:13,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 93. [2022-07-23 06:42:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.434782608695652) internal successors, (99), 87 states have internal predecessors, (99), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:13,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2022-07-23 06:42:13,613 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 39 [2022-07-23 06:42:13,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:13,613 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2022-07-23 06:42:13,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2022-07-23 06:42:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-23 06:42:13,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:13,614 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:13,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-23 06:42:13,614 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:13,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:13,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1573341240, now seen corresponding path program 1 times [2022-07-23 06:42:13,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:13,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310342316] [2022-07-23 06:42:13,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:13,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:13,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:13,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-23 06:42:13,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:13,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310342316] [2022-07-23 06:42:13,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310342316] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:13,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:42:13,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 06:42:13,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68053600] [2022-07-23 06:42:13,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:13,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:42:13,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:13,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:42:13,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:42:13,676 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:13,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:13,768 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2022-07-23 06:42:13,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:42:13,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2022-07-23 06:42:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:13,771 INFO L225 Difference]: With dead ends: 135 [2022-07-23 06:42:13,771 INFO L226 Difference]: Without dead ends: 135 [2022-07-23 06:42:13,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:42:13,772 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 390 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:13,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 318 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:42:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-23 06:42:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 93. [2022-07-23 06:42:13,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 87 states have internal predecessors, (98), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:13,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2022-07-23 06:42:13,776 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 42 [2022-07-23 06:42:13,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:13,776 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2022-07-23 06:42:13,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2022-07-23 06:42:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-23 06:42:13,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:13,784 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:13,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-23 06:42:13,785 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:13,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:13,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1574973534, now seen corresponding path program 1 times [2022-07-23 06:42:13,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:13,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886327060] [2022-07-23 06:42:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:13,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:13,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:13,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:42:13,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:13,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886327060] [2022-07-23 06:42:13,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886327060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:13,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081351063] [2022-07-23 06:42:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:13,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:13,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:13,900 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) [2022-07-23 06:42:13,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-23 06:42:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:13,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-23 06:42:13,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:13,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:42:13,988 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 06:42:13,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-23 06:42:14,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:42:14,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:42:14,266 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-23 06:42:14,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2022-07-23 06:42:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:42:14,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:42:14,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-07-23 06:42:14,383 INFO L356 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2022-07-23 06:42:14,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 107 [2022-07-23 06:42:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:42:14,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081351063] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:42:14,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 06:42:14,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 25 [2022-07-23 06:42:14,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603179580] [2022-07-23 06:42:14,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 06:42:14,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 06:42:14,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:14,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 06:42:14,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-07-23 06:42:14,495 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand has 26 states, 25 states have (on average 2.6) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:14,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:14,814 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2022-07-23 06:42:14,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 06:42:14,814 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-07-23 06:42:14,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:14,815 INFO L225 Difference]: With dead ends: 137 [2022-07-23 06:42:14,815 INFO L226 Difference]: Without dead ends: 137 [2022-07-23 06:42:14,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2022-07-23 06:42:14,816 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 112 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:14,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 880 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 416 Invalid, 0 Unknown, 235 Unchecked, 0.2s Time] [2022-07-23 06:42:14,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-23 06:42:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 96. [2022-07-23 06:42:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 90 states have internal predecessors, (103), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:14,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2022-07-23 06:42:14,818 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 42 [2022-07-23 06:42:14,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:14,818 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2022-07-23 06:42:14,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:14,818 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2022-07-23 06:42:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-23 06:42:14,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:14,819 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:14,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-23 06:42:15,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-23 06:42:15,020 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1574973535, now seen corresponding path program 1 times [2022-07-23 06:42:15,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:15,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567460775] [2022-07-23 06:42:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:15,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:15,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:15,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:42:15,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:15,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567460775] [2022-07-23 06:42:15,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567460775] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:15,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977954018] [2022-07-23 06:42:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:15,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:15,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:15,161 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 06:42:15,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-23 06:42:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:15,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-23 06:42:15,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:15,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:42:15,287 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:42:15,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-23 06:42:15,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-07-23 06:42:15,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:42:15,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:42:15,724 INFO L356 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-07-23 06:42:15,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 54 [2022-07-23 06:42:15,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 06:42:15,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:42:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:42:15,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:42:16,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977954018] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:16,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:42:16,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-23 06:42:16,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611236838] [2022-07-23 06:42:16,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:42:16,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-23 06:42:16,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:16,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-23 06:42:16,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2022-07-23 06:42:16,060 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:16,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:16,892 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2022-07-23 06:42:16,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 06:42:16,892 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-07-23 06:42:16,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:16,893 INFO L225 Difference]: With dead ends: 116 [2022-07-23 06:42:16,893 INFO L226 Difference]: Without dead ends: 116 [2022-07-23 06:42:16,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=230, Invalid=1750, Unknown=0, NotChecked=0, Total=1980 [2022-07-23 06:42:16,894 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 78 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:16,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1324 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 586 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2022-07-23 06:42:16,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-23 06:42:16,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2022-07-23 06:42:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 90 states have internal predecessors, (102), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2022-07-23 06:42:16,896 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 42 [2022-07-23 06:42:16,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:16,897 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2022-07-23 06:42:16,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:16,897 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2022-07-23 06:42:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-23 06:42:16,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:16,897 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:16,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-23 06:42:17,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:17,103 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:17,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1812282727, now seen corresponding path program 1 times [2022-07-23 06:42:17,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:17,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12509496] [2022-07-23 06:42:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:17,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:17,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:17,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:42:17,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:17,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12509496] [2022-07-23 06:42:17,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12509496] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:17,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392628617] [2022-07-23 06:42:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:17,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:17,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:17,176 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) [2022-07-23 06:42:17,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-23 06:42:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:17,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-23 06:42:17,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:17,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:42:17,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:42:17,427 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:42:17,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-23 06:42:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:42:17,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:42:17,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-07-23 06:42:17,529 INFO L356 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2022-07-23 06:42:17,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 132 [2022-07-23 06:42:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:42:17,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392628617] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:42:17,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 06:42:17,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 23 [2022-07-23 06:42:17,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097572909] [2022-07-23 06:42:17,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 06:42:17,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-23 06:42:17,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:17,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 06:42:17,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-07-23 06:42:17,582 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:17,782 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2022-07-23 06:42:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 06:42:17,782 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-07-23 06:42:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:17,783 INFO L225 Difference]: With dead ends: 117 [2022-07-23 06:42:17,783 INFO L226 Difference]: Without dead ends: 117 [2022-07-23 06:42:17,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-07-23 06:42:17,784 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 49 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:17,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1184 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 263 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2022-07-23 06:42:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-23 06:42:17,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 96. [2022-07-23 06:42:17,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 90 states have internal predecessors, (101), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2022-07-23 06:42:17,787 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 45 [2022-07-23 06:42:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:17,788 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2022-07-23 06:42:17,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:17,790 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2022-07-23 06:42:17,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-23 06:42:17,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:17,790 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:17,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-23 06:42:17,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:17,999 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:18,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1813915021, now seen corresponding path program 2 times [2022-07-23 06:42:18,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:18,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290888121] [2022-07-23 06:42:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:18,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:18,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:18,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:42:18,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:18,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290888121] [2022-07-23 06:42:18,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290888121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:18,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405813712] [2022-07-23 06:42:18,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:42:18,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:18,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:18,199 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) [2022-07-23 06:42:18,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-23 06:42:18,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:42:18,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:42:18,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-23 06:42:18,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:18,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:42:18,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:42:18,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:42:18,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:42:18,357 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:42:18,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-23 06:42:18,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-23 06:42:18,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-23 06:42:18,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-23 06:42:18,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 06:42:18,990 INFO L356 Elim1Store]: treesize reduction 76, result has 26.9 percent of original size [2022-07-23 06:42:18,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 79 [2022-07-23 06:42:18,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 06:42:19,002 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 06:42:19,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-23 06:42:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:42:19,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:42:19,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405813712] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:19,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:42:19,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 29 [2022-07-23 06:42:19,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053411915] [2022-07-23 06:42:19,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:42:19,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-23 06:42:19,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:19,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-23 06:42:19,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2022-07-23 06:42:19,238 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:19,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:19,854 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2022-07-23 06:42:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 06:42:19,855 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-07-23 06:42:19,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:19,855 INFO L225 Difference]: With dead ends: 141 [2022-07-23 06:42:19,856 INFO L226 Difference]: Without dead ends: 141 [2022-07-23 06:42:19,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=159, Invalid=1647, Unknown=0, NotChecked=0, Total=1806 [2022-07-23 06:42:19,857 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 69 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:19,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1645 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 523 Invalid, 0 Unknown, 110 Unchecked, 0.2s Time] [2022-07-23 06:42:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-23 06:42:19,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 122. [2022-07-23 06:42:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 96 states have (on average 1.34375) internal successors, (129), 114 states have internal predecessors, (129), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:42:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 137 transitions. [2022-07-23 06:42:19,862 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 137 transitions. Word has length 45 [2022-07-23 06:42:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:19,862 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 137 transitions. [2022-07-23 06:42:19,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:42:19,863 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 137 transitions. [2022-07-23 06:42:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-23 06:42:19,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:19,863 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:19,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-23 06:42:20,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-23 06:42:20,081 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:20,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:20,082 INFO L85 PathProgramCache]: Analyzing trace with hash -285859641, now seen corresponding path program 1 times [2022-07-23 06:42:20,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:20,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327806458] [2022-07-23 06:42:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:20,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:20,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:20,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:20,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-23 06:42:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:42:20,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:20,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327806458] [2022-07-23 06:42:20,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327806458] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:20,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070766109] [2022-07-23 06:42:20,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:20,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:20,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:20,164 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) [2022-07-23 06:42:20,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-23 06:42:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:20,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:42:20,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-23 06:42:20,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:42:20,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070766109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:20,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 06:42:20,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-07-23 06:42:20,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940345835] [2022-07-23 06:42:20,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:20,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:42:20,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:20,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:42:20,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:42:20,267 INFO L87 Difference]: Start difference. First operand 122 states and 137 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:42:20,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:20,296 INFO L93 Difference]: Finished difference Result 186 states and 209 transitions. [2022-07-23 06:42:20,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:42:20,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-07-23 06:42:20,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:20,298 INFO L225 Difference]: With dead ends: 186 [2022-07-23 06:42:20,298 INFO L226 Difference]: Without dead ends: 186 [2022-07-23 06:42:20,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:42:20,300 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 33 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:20,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 353 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:42:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-23 06:42:20,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 138. [2022-07-23 06:42:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 110 states have (on average 1.3363636363636364) internal successors, (147), 128 states have internal predecessors, (147), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 06:42:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 157 transitions. [2022-07-23 06:42:20,305 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 157 transitions. Word has length 47 [2022-07-23 06:42:20,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:20,306 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 157 transitions. [2022-07-23 06:42:20,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:42:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 157 transitions. [2022-07-23 06:42:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-23 06:42:20,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:20,307 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:20,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-23 06:42:20,525 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,SelfDestructingSolverStorable14 [2022-07-23 06:42:20,525 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:20,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:20,525 INFO L85 PathProgramCache]: Analyzing trace with hash -937654824, now seen corresponding path program 2 times [2022-07-23 06:42:20,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:20,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113848594] [2022-07-23 06:42:20,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:20,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:20,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:20,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-23 06:42:20,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:20,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113848594] [2022-07-23 06:42:20,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113848594] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:20,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73225413] [2022-07-23 06:42:20,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:42:20,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:20,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:20,708 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) [2022-07-23 06:42:20,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-23 06:42:20,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:42:20,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:42:20,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-23 06:42:20,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-23 06:42:20,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:42:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-23 06:42:21,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73225413] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:42:21,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 06:42:21,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 26 [2022-07-23 06:42:21,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978468733] [2022-07-23 06:42:21,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 06:42:21,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 06:42:21,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:21,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 06:42:21,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-07-23 06:42:21,162 INFO L87 Difference]: Start difference. First operand 138 states and 157 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:42:21,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:21,432 INFO L93 Difference]: Finished difference Result 318 states and 360 transitions. [2022-07-23 06:42:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 06:42:21,432 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2022-07-23 06:42:21,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:21,434 INFO L225 Difference]: With dead ends: 318 [2022-07-23 06:42:21,434 INFO L226 Difference]: Without dead ends: 318 [2022-07-23 06:42:21,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 06:42:21,448 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 187 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:21,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 1250 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:42:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-23 06:42:21,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 193. [2022-07-23 06:42:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 162 states have (on average 1.2592592592592593) internal successors, (204), 180 states have internal predecessors, (204), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-23 06:42:21,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 222 transitions. [2022-07-23 06:42:21,456 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 222 transitions. Word has length 48 [2022-07-23 06:42:21,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:21,457 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 222 transitions. [2022-07-23 06:42:21,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:42:21,457 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 222 transitions. [2022-07-23 06:42:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 06:42:21,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:21,457 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:21,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-23 06:42:21,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-23 06:42:21,674 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:21,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:21,675 INFO L85 PathProgramCache]: Analyzing trace with hash -66371861, now seen corresponding path program 1 times [2022-07-23 06:42:21,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:21,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908071272] [2022-07-23 06:42:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:21,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:21,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:21,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:21,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-23 06:42:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:42:21,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:21,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908071272] [2022-07-23 06:42:21,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908071272] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:21,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451559787] [2022-07-23 06:42:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:21,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:21,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:21,764 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) [2022-07-23 06:42:21,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-23 06:42:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:21,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 06:42:21,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-23 06:42:21,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:42:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:42:22,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451559787] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:42:22,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 06:42:22,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-07-23 06:42:22,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932728746] [2022-07-23 06:42:22,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 06:42:22,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 06:42:22,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:22,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 06:42:22,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-07-23 06:42:22,188 INFO L87 Difference]: Start difference. First operand 193 states and 222 transitions. Second operand has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 22 states have internal predecessors, (83), 4 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-23 06:42:22,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:22,571 INFO L93 Difference]: Finished difference Result 299 states and 349 transitions. [2022-07-23 06:42:22,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 06:42:22,571 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 22 states have internal predecessors, (83), 4 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2022-07-23 06:42:22,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:22,572 INFO L225 Difference]: With dead ends: 299 [2022-07-23 06:42:22,572 INFO L226 Difference]: Without dead ends: 299 [2022-07-23 06:42:22,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2022-07-23 06:42:22,573 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 145 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:22,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1114 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:42:22,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-07-23 06:42:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 217. [2022-07-23 06:42:22,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 183 states have (on average 1.284153005464481) internal successors, (235), 203 states have internal predecessors, (235), 6 states have call successors, (6), 4 states have call predecessors, (6), 9 states have return successors, (14), 9 states have call predecessors, (14), 6 states have call successors, (14) [2022-07-23 06:42:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 255 transitions. [2022-07-23 06:42:22,579 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 255 transitions. Word has length 50 [2022-07-23 06:42:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:22,579 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 255 transitions. [2022-07-23 06:42:22,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 22 states have internal predecessors, (83), 4 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-23 06:42:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 255 transitions. [2022-07-23 06:42:22,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 06:42:22,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:22,580 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:22,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-23 06:42:22,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-23 06:42:22,799 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:22,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1755315603, now seen corresponding path program 1 times [2022-07-23 06:42:22,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:22,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687738782] [2022-07-23 06:42:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:22,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:22,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:22,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:22,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-23 06:42:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-23 06:42:22,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:22,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687738782] [2022-07-23 06:42:22,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687738782] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:22,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941181164] [2022-07-23 06:42:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:22,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:22,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:22,915 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) [2022-07-23 06:42:22,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-23 06:42:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:23,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-23 06:42:23,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:23,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:42:23,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:42:23,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-07-23 06:42:23,062 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:42:23,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 [2022-07-23 06:42:23,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:42:23,172 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:42:23,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2022-07-23 06:42:23,257 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:42:23,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 06:42:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-23 06:42:23,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:42:23,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-23 06:42:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-23 06:42:23,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941181164] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:42:23,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 06:42:23,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2022-07-23 06:42:23,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675877985] [2022-07-23 06:42:23,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 06:42:23,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-23 06:42:23,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:23,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-23 06:42:23,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-07-23 06:42:23,426 INFO L87 Difference]: Start difference. First operand 217 states and 255 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:42:23,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:23,761 INFO L93 Difference]: Finished difference Result 258 states and 302 transitions. [2022-07-23 06:42:23,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:42:23,762 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-07-23 06:42:23,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:23,763 INFO L225 Difference]: With dead ends: 258 [2022-07-23 06:42:23,763 INFO L226 Difference]: Without dead ends: 258 [2022-07-23 06:42:23,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2022-07-23 06:42:23,763 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 297 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:23,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 822 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 394 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-07-23 06:42:23,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-23 06:42:23,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 212. [2022-07-23 06:42:23,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 180 states have (on average 1.2666666666666666) internal successors, (228), 198 states have internal predecessors, (228), 6 states have call successors, (6), 4 states have call predecessors, (6), 9 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-23 06:42:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 247 transitions. [2022-07-23 06:42:23,768 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 247 transitions. Word has length 50 [2022-07-23 06:42:23,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:23,768 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 247 transitions. [2022-07-23 06:42:23,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:42:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 247 transitions. [2022-07-23 06:42:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 06:42:23,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:23,769 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:23,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-23 06:42:23,979 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,SelfDestructingSolverStorable17 [2022-07-23 06:42:23,980 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:23,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:23,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1755315602, now seen corresponding path program 1 times [2022-07-23 06:42:23,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:23,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789570042] [2022-07-23 06:42:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:23,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:24,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:24,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:24,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-23 06:42:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-23 06:42:24,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:24,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789570042] [2022-07-23 06:42:24,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789570042] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:24,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927426719] [2022-07-23 06:42:24,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:24,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:24,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:24,180 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) [2022-07-23 06:42:24,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-23 06:42:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:24,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 06:42:24,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:24,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:42:24,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:42:24,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 06:42:24,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:42:24,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 06:42:24,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:42:24,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-23 06:42:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-23 06:42:24,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:42:24,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927426719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:24,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 06:42:24,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 11 [2022-07-23 06:42:24,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865593668] [2022-07-23 06:42:24,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:24,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:42:24,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:24,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:42:24,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-07-23 06:42:24,465 INFO L87 Difference]: Start difference. First operand 212 states and 247 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-07-23 06:42:24,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:24,513 INFO L93 Difference]: Finished difference Result 237 states and 274 transitions. [2022-07-23 06:42:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:42:24,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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 50 [2022-07-23 06:42:24,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:24,515 INFO L225 Difference]: With dead ends: 237 [2022-07-23 06:42:24,515 INFO L226 Difference]: Without dead ends: 237 [2022-07-23 06:42:24,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:42:24,515 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 107 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:24,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 167 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2022-07-23 06:42:24,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-23 06:42:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 210. [2022-07-23 06:42:24,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 180 states have (on average 1.2555555555555555) internal successors, (226), 196 states have internal predecessors, (226), 6 states have call successors, (6), 4 states have call predecessors, (6), 9 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-23 06:42:24,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 245 transitions. [2022-07-23 06:42:24,519 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 245 transitions. Word has length 50 [2022-07-23 06:42:24,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:24,519 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 245 transitions. [2022-07-23 06:42:24,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-07-23 06:42:24,520 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 245 transitions. [2022-07-23 06:42:24,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 06:42:24,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:24,520 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:24,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-23 06:42:24,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:24,721 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:24,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1074364724, now seen corresponding path program 3 times [2022-07-23 06:42:24,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:24,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670363539] [2022-07-23 06:42:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:24,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:24,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:24,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-23 06:42:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:42:24,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:24,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670363539] [2022-07-23 06:42:24,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670363539] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:24,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23048988] [2022-07-23 06:42:24,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 06:42:24,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:24,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:24,790 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) [2022-07-23 06:42:24,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-23 06:42:24,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-23 06:42:24,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:42:24,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 06:42:24,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:42:24,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:42:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:42:24,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23048988] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:42:24,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 06:42:24,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 16 [2022-07-23 06:42:25,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847781513] [2022-07-23 06:42:25,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 06:42:25,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 06:42:25,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:25,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 06:42:25,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:42:25,001 INFO L87 Difference]: Start difference. First operand 210 states and 245 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:42:25,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:25,154 INFO L93 Difference]: Finished difference Result 258 states and 297 transitions. [2022-07-23 06:42:25,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 06:42:25,155 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-07-23 06:42:25,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:25,156 INFO L225 Difference]: With dead ends: 258 [2022-07-23 06:42:25,156 INFO L226 Difference]: Without dead ends: 258 [2022-07-23 06:42:25,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-07-23 06:42:25,157 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 132 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:25,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 969 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:42:25,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-23 06:42:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 184. [2022-07-23 06:42:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 156 states have (on average 1.2564102564102564) internal successors, (196), 171 states have internal predecessors, (196), 5 states have call successors, (5), 4 states have call predecessors, (5), 8 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-23 06:42:25,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 211 transitions. [2022-07-23 06:42:25,163 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 211 transitions. Word has length 50 [2022-07-23 06:42:25,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:25,163 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 211 transitions. [2022-07-23 06:42:25,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:42:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 211 transitions. [2022-07-23 06:42:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 06:42:25,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:25,164 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:25,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-23 06:42:25,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:25,383 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:25,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:25,384 INFO L85 PathProgramCache]: Analyzing trace with hash 793594527, now seen corresponding path program 1 times [2022-07-23 06:42:25,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:25,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346036075] [2022-07-23 06:42:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:25,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:25,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:25,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-23 06:42:25,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:25,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346036075] [2022-07-23 06:42:25,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346036075] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:25,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:42:25,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 06:42:25,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178637170] [2022-07-23 06:42:25,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:25,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:42:25,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:25,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:42:25,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:42:25,428 INFO L87 Difference]: Start difference. First operand 184 states and 211 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:25,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:25,562 INFO L93 Difference]: Finished difference Result 231 states and 263 transitions. [2022-07-23 06:42:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 06:42:25,562 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-07-23 06:42:25,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:25,563 INFO L225 Difference]: With dead ends: 231 [2022-07-23 06:42:25,563 INFO L226 Difference]: Without dead ends: 231 [2022-07-23 06:42:25,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:42:25,564 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 327 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:25,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 247 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:42:25,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-23 06:42:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 193. [2022-07-23 06:42:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 166 states have (on average 1.2710843373493976) internal successors, (211), 180 states have internal predecessors, (211), 5 states have call successors, (5), 4 states have call predecessors, (5), 8 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-23 06:42:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 226 transitions. [2022-07-23 06:42:25,568 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 226 transitions. Word has length 51 [2022-07-23 06:42:25,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:25,568 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 226 transitions. [2022-07-23 06:42:25,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 226 transitions. [2022-07-23 06:42:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 06:42:25,569 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:25,569 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:25,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-23 06:42:25,569 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:25,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:25,570 INFO L85 PathProgramCache]: Analyzing trace with hash 793594528, now seen corresponding path program 1 times [2022-07-23 06:42:25,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:25,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217615467] [2022-07-23 06:42:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:25,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:25,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:25,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-23 06:42:25,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:25,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217615467] [2022-07-23 06:42:25,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217615467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:25,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:42:25,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 06:42:25,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930379987] [2022-07-23 06:42:25,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:25,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:42:25,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:42:25,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:42:25,633 INFO L87 Difference]: Start difference. First operand 193 states and 226 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:25,801 INFO L93 Difference]: Finished difference Result 231 states and 262 transitions. [2022-07-23 06:42:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:42:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-07-23 06:42:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:25,802 INFO L225 Difference]: With dead ends: 231 [2022-07-23 06:42:25,802 INFO L226 Difference]: Without dead ends: 231 [2022-07-23 06:42:25,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:42:25,803 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 377 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:25,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 230 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:42:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-23 06:42:25,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 195. [2022-07-23 06:42:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 168 states have (on average 1.2619047619047619) internal successors, (212), 182 states have internal predecessors, (212), 5 states have call successors, (5), 4 states have call predecessors, (5), 8 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-23 06:42:25,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 227 transitions. [2022-07-23 06:42:25,807 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 227 transitions. Word has length 51 [2022-07-23 06:42:25,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:25,807 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 227 transitions. [2022-07-23 06:42:25,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:25,807 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 227 transitions. [2022-07-23 06:42:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 06:42:25,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:25,808 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:25,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-23 06:42:25,808 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:25,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:25,808 INFO L85 PathProgramCache]: Analyzing trace with hash 753850610, now seen corresponding path program 1 times [2022-07-23 06:42:25,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:25,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873898163] [2022-07-23 06:42:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:25,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:25,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:25,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 06:42:25,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:25,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873898163] [2022-07-23 06:42:25,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873898163] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:25,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894121473] [2022-07-23 06:42:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:25,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:25,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:25,907 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) [2022-07-23 06:42:25,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-23 06:42:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:25,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 06:42:25,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 06:42:26,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:42:26,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894121473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:26,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 06:42:26,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2022-07-23 06:42:26,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291585083] [2022-07-23 06:42:26,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:26,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:42:26,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:26,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:42:26,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-23 06:42:26,045 INFO L87 Difference]: Start difference. First operand 195 states and 227 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 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) [2022-07-23 06:42:26,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:26,095 INFO L93 Difference]: Finished difference Result 222 states and 258 transitions. [2022-07-23 06:42:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:42:26,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 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 51 [2022-07-23 06:42:26,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:26,096 INFO L225 Difference]: With dead ends: 222 [2022-07-23 06:42:26,096 INFO L226 Difference]: Without dead ends: 222 [2022-07-23 06:42:26,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:42:26,097 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 29 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:26,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 348 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:42:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-23 06:42:26,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 193. [2022-07-23 06:42:26,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 181 states have internal predecessors, (208), 5 states have call successors, (5), 4 states have call predecessors, (5), 8 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-23 06:42:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 223 transitions. [2022-07-23 06:42:26,101 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 223 transitions. Word has length 51 [2022-07-23 06:42:26,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:26,101 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 223 transitions. [2022-07-23 06:42:26,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 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) [2022-07-23 06:42:26,102 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 223 transitions. [2022-07-23 06:42:26,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 06:42:26,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:26,102 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:26,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-23 06:42:26,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:26,312 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:26,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:26,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1396186650, now seen corresponding path program 1 times [2022-07-23 06:42:26,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:26,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104332855] [2022-07-23 06:42:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:26,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:26,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:26,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-23 06:42:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 06:42:26,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:26,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104332855] [2022-07-23 06:42:26,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104332855] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:26,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162256741] [2022-07-23 06:42:26,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:26,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:26,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:26,381 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) [2022-07-23 06:42:26,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-23 06:42:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:26,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 06:42:26,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 06:42:26,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:42:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 06:42:26,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162256741] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:42:26,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 06:42:26,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-07-23 06:42:26,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211551772] [2022-07-23 06:42:26,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 06:42:26,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 06:42:26,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:26,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 06:42:26,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:42:26,607 INFO L87 Difference]: Start difference. First operand 193 states and 223 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:42:26,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:26,740 INFO L93 Difference]: Finished difference Result 185 states and 213 transitions. [2022-07-23 06:42:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 06:42:26,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2022-07-23 06:42:26,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:26,741 INFO L225 Difference]: With dead ends: 185 [2022-07-23 06:42:26,741 INFO L226 Difference]: Without dead ends: 179 [2022-07-23 06:42:26,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-07-23 06:42:26,742 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 36 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:26,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 637 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:42:26,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-23 06:42:26,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 173. [2022-07-23 06:42:26,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 148 states have (on average 1.2432432432432432) internal successors, (184), 162 states have internal predecessors, (184), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:42:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 195 transitions. [2022-07-23 06:42:26,745 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 195 transitions. Word has length 51 [2022-07-23 06:42:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:26,745 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 195 transitions. [2022-07-23 06:42:26,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:42:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 195 transitions. [2022-07-23 06:42:26,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-23 06:42:26,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:26,746 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:26,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-23 06:42:26,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-23 06:42:26,951 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:26,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:26,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1168374810, now seen corresponding path program 1 times [2022-07-23 06:42:26,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:26,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555593482] [2022-07-23 06:42:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:26,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:42:27,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:27,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555593482] [2022-07-23 06:42:27,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555593482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:27,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930641161] [2022-07-23 06:42:27,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:27,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:27,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:27,023 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 06:42:27,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-23 06:42:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 06:42:27,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:27,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-23 06:42:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:42:27,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:42:27,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930641161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:27,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 06:42:27,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 15 [2022-07-23 06:42:27,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108004358] [2022-07-23 06:42:27,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:27,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 06:42:27,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:27,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 06:42:27,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-07-23 06:42:27,194 INFO L87 Difference]: Start difference. First operand 173 states and 195 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:27,294 INFO L93 Difference]: Finished difference Result 192 states and 212 transitions. [2022-07-23 06:42:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 06:42:27,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-07-23 06:42:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:27,295 INFO L225 Difference]: With dead ends: 192 [2022-07-23 06:42:27,295 INFO L226 Difference]: Without dead ends: 192 [2022-07-23 06:42:27,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-07-23 06:42:27,295 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 74 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:27,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 503 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2022-07-23 06:42:27,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-23 06:42:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2022-07-23 06:42:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 148 states have (on average 1.2364864864864864) internal successors, (183), 162 states have internal predecessors, (183), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:42:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 194 transitions. [2022-07-23 06:42:27,298 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 194 transitions. Word has length 52 [2022-07-23 06:42:27,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:27,299 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 194 transitions. [2022-07-23 06:42:27,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:42:27,299 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 194 transitions. [2022-07-23 06:42:27,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-23 06:42:27,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:27,301 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:27,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-23 06:42:27,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:27,511 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:27,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:27,512 INFO L85 PathProgramCache]: Analyzing trace with hash 162004220, now seen corresponding path program 1 times [2022-07-23 06:42:27,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:27,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388010025] [2022-07-23 06:42:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:27,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-23 06:42:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-23 06:42:27,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:27,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388010025] [2022-07-23 06:42:27,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388010025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:27,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:42:27,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:42:27,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69002309] [2022-07-23 06:42:27,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:27,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:42:27,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:27,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:42:27,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:42:27,538 INFO L87 Difference]: Start difference. First operand 173 states and 194 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-07-23 06:42:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:27,567 INFO L93 Difference]: Finished difference Result 189 states and 209 transitions. [2022-07-23 06:42:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:42:27,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 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 54 [2022-07-23 06:42:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:27,569 INFO L225 Difference]: With dead ends: 189 [2022-07-23 06:42:27,569 INFO L226 Difference]: Without dead ends: 189 [2022-07-23 06:42:27,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:42:27,570 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 41 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:27,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 133 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:42:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-23 06:42:27,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 172. [2022-07-23 06:42:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 148 states have (on average 1.2297297297297298) internal successors, (182), 161 states have internal predecessors, (182), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:42:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 193 transitions. [2022-07-23 06:42:27,574 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 193 transitions. Word has length 54 [2022-07-23 06:42:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:27,574 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 193 transitions. [2022-07-23 06:42:27,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-07-23 06:42:27,574 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 193 transitions. [2022-07-23 06:42:27,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-23 06:42:27,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:27,575 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:27,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-23 06:42:27,575 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:27,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:27,575 INFO L85 PathProgramCache]: Analyzing trace with hash 162004221, now seen corresponding path program 1 times [2022-07-23 06:42:27,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:27,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231589605] [2022-07-23 06:42:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:27,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-23 06:42:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-23 06:42:27,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:27,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231589605] [2022-07-23 06:42:27,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231589605] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:27,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:42:27,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:42:27,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91163772] [2022-07-23 06:42:27,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:27,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:42:27,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:27,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:42:27,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:42:27,617 INFO L87 Difference]: Start difference. First operand 172 states and 193 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-07-23 06:42:27,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:27,639 INFO L93 Difference]: Finished difference Result 190 states and 209 transitions. [2022-07-23 06:42:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:42:27,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 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 54 [2022-07-23 06:42:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:27,640 INFO L225 Difference]: With dead ends: 190 [2022-07-23 06:42:27,640 INFO L226 Difference]: Without dead ends: 190 [2022-07-23 06:42:27,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:42:27,641 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 43 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:27,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 140 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:42:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-07-23 06:42:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 171. [2022-07-23 06:42:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 148 states have (on average 1.222972972972973) internal successors, (181), 160 states have internal predecessors, (181), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:42:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 192 transitions. [2022-07-23 06:42:27,647 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 192 transitions. Word has length 54 [2022-07-23 06:42:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:27,648 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 192 transitions. [2022-07-23 06:42:27,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-07-23 06:42:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 192 transitions. [2022-07-23 06:42:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-23 06:42:27,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:27,649 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:27,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-23 06:42:27,649 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:27,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:27,650 INFO L85 PathProgramCache]: Analyzing trace with hash 162004276, now seen corresponding path program 1 times [2022-07-23 06:42:27,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:27,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765268025] [2022-07-23 06:42:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:27,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-23 06:42:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-23 06:42:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 06:42:27,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:27,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765268025] [2022-07-23 06:42:27,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765268025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:42:27,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:42:27,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 06:42:27,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680926256] [2022-07-23 06:42:27,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:42:27,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:42:27,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:42:27,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:42:27,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:42:27,695 INFO L87 Difference]: Start difference. First operand 171 states and 192 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 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) [2022-07-23 06:42:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:42:27,731 INFO L93 Difference]: Finished difference Result 184 states and 207 transitions. [2022-07-23 06:42:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:42:27,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 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 54 [2022-07-23 06:42:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:42:27,732 INFO L225 Difference]: With dead ends: 184 [2022-07-23 06:42:27,732 INFO L226 Difference]: Without dead ends: 184 [2022-07-23 06:42:27,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:42:27,733 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 14 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:42:27,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 389 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:42:27,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-23 06:42:27,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-07-23 06:42:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 160 states have (on average 1.21875) internal successors, (195), 172 states have internal predecessors, (195), 4 states have call successors, (4), 4 states have call predecessors, (4), 8 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-23 06:42:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 207 transitions. [2022-07-23 06:42:27,737 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 207 transitions. Word has length 54 [2022-07-23 06:42:27,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:42:27,737 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 207 transitions. [2022-07-23 06:42:27,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 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) [2022-07-23 06:42:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 207 transitions. [2022-07-23 06:42:27,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-23 06:42:27,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:42:27,738 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:42:27,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-23 06:42:27,738 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 06:42:27,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:42:27,739 INFO L85 PathProgramCache]: Analyzing trace with hash 658181978, now seen corresponding path program 1 times [2022-07-23 06:42:27,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:42:27,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209736502] [2022-07-23 06:42:27,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:27,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:42:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:42:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-23 06:42:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-23 06:42:27,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:42:27,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209736502] [2022-07-23 06:42:27,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209736502] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:42:27,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840709088] [2022-07-23 06:42:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:42:27,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:42:27,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:42:27,904 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 06:42:27,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-23 06:42:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:42:28,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-23 06:42:28,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:42:28,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:42:28,018 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 06:42:28,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-23 06:42:28,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:42:28,123 INFO L356 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-07-23 06:42:28,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-07-23 06:42:28,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2022-07-23 06:42:28,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:42:28,591 INFO L356 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2022-07-23 06:42:28,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 27 [2022-07-23 06:42:28,699 INFO L356 Elim1Store]: treesize reduction 10, result has 69.7 percent of original size [2022-07-23 06:42:28,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 55 [2022-07-23 06:42:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:42:28,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:42:29,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:42:29,036 INFO L356 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2022-07-23 06:42:29,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 284 treesize of output 263 [2022-07-23 06:42:42,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 06:42:42,821 INFO L356 Elim1Store]: treesize reduction 74, result has 60.2 percent of original size [2022-07-23 06:42:42,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 2629 treesize of output 2312