./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/verifythis/elimination_max_rec.c -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 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 20:15:44,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 20:15:44,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 20:15:44,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 20:15:44,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 20:15:44,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 20:15:44,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 20:15:44,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 20:15:44,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 20:15:44,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 20:15:44,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 20:15:44,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 20:15:44,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 20:15:44,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 20:15:44,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 20:15:44,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 20:15:44,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 20:15:44,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 20:15:44,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 20:15:44,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 20:15:44,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 20:15:44,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 20:15:44,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 20:15:44,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 20:15:44,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 20:15:44,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 20:15:44,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 20:15:44,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 20:15:44,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 20:15:44,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 20:15:44,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 20:15:44,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 20:15:44,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 20:15:44,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 20:15:44,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 20:15:44,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 20:15:44,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 20:15:44,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 20:15:44,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 20:15:44,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 20:15:44,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 20:15:44,479 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 20:15:44,508 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 20:15:44,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 20:15:44,509 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 20:15:44,509 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 20:15:44,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 20:15:44,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 20:15:44,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 20:15:44,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 20:15:44,511 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 20:15:44,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 20:15:44,512 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 20:15:44,512 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 20:15:44,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 20:15:44,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 20:15:44,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 20:15:44,513 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 20:15:44,513 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 20:15:44,513 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 20:15:44,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 20:15:44,514 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 20:15:44,514 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 20:15:44,514 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 20:15:44,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 20:15:44,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 20:15:44,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 20:15:44,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:15:44,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 20:15:44,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 20:15:44,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 20:15:44,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 20:15:44,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 20:15:44,516 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a [2021-12-18 20:15:44,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 20:15:44,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 20:15:44,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 20:15:44,757 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 20:15:44,758 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 20:15:44,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-12-18 20:15:44,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2666049f/09b95cd46e8d49778a14c7625fb4ac9d/FLAG4a28adc3c [2021-12-18 20:15:45,094 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 20:15:45,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-12-18 20:15:45,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2666049f/09b95cd46e8d49778a14c7625fb4ac9d/FLAG4a28adc3c [2021-12-18 20:15:45,526 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2666049f/09b95cd46e8d49778a14c7625fb4ac9d [2021-12-18 20:15:45,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 20:15:45,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 20:15:45,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 20:15:45,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 20:15:45,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 20:15:45,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:15:45" (1/1) ... [2021-12-18 20:15:45,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46e58d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:15:45, skipping insertion in model container [2021-12-18 20:15:45,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:15:45" (1/1) ... [2021-12-18 20:15:45,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 20:15:45,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 20:15:45,664 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/verifythis/elimination_max_rec.c[493,506] [2021-12-18 20:15:45,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:15:45,682 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 20:15:45,689 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/verifythis/elimination_max_rec.c[493,506] [2021-12-18 20:15:45,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:15:45,709 INFO L208 MainTranslator]: Completed translation [2021-12-18 20:15:45,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:15:45 WrapperNode [2021-12-18 20:15:45,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 20:15:45,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 20:15:45,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 20:15:45,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 20:15:45,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:15:45" (1/1) ... [2021-12-18 20:15:45,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:15:45" (1/1) ... [2021-12-18 20:15:45,728 INFO L137 Inliner]: procedures = 19, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 28 [2021-12-18 20:15:45,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 20:15:45,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 20:15:45,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 20:15:45,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 20:15:45,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:15:45" (1/1) ... [2021-12-18 20:15:45,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:15:45" (1/1) ... [2021-12-18 20:15:45,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:15:45" (1/1) ... [2021-12-18 20:15:45,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:15:45" (1/1) ... [2021-12-18 20:15:45,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:15:45" (1/1) ... [2021-12-18 20:15:45,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:15:45" (1/1) ... [2021-12-18 20:15:45,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:15:45" (1/1) ... [2021-12-18 20:15:45,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 20:15:45,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 20:15:45,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 20:15:45,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 20:15:45,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:15:45" (1/1) ... [2021-12-18 20:15:45,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:15:45,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:15:45,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 20:15:45,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 20:15:45,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 20:15:45,813 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-18 20:15:45,813 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-18 20:15:45,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 20:15:45,813 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-12-18 20:15:45,813 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-12-18 20:15:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 20:15:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 20:15:45,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 20:15:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 20:15:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 20:15:45,814 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 20:15:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 20:15:45,861 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 20:15:45,862 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 20:15:46,030 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 20:15:46,034 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 20:15:46,034 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-18 20:15:46,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:15:46 BoogieIcfgContainer [2021-12-18 20:15:46,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 20:15:46,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 20:15:46,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 20:15:46,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 20:15:46,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 08:15:45" (1/3) ... [2021-12-18 20:15:46,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1773da13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:15:46, skipping insertion in model container [2021-12-18 20:15:46,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:15:45" (2/3) ... [2021-12-18 20:15:46,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1773da13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:15:46, skipping insertion in model container [2021-12-18 20:15:46,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:15:46" (3/3) ... [2021-12-18 20:15:46,055 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2021-12-18 20:15:46,058 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 20:15:46,058 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-12-18 20:15:46,110 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 20:15:46,116 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 20:15:46,116 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-12-18 20:15:46,129 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 43 states have internal predecessors, (47), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 20:15:46,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 20:15:46,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:46,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:46,142 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:15:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:46,146 INFO L85 PathProgramCache]: Analyzing trace with hash -727728534, now seen corresponding path program 1 times [2021-12-18 20:15:46,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:46,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221510146] [2021-12-18 20:15:46,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:46,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:15:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:46,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:46,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221510146] [2021-12-18 20:15:46,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221510146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:15:46,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:15:46,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:15:46,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525318521] [2021-12-18 20:15:46,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:15:46,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 20:15:46,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:46,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 20:15:46,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 20:15:46,340 INFO L87 Difference]: Start difference. First operand has 53 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 43 states have internal predecessors, (47), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 20:15:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:46,354 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-12-18 20:15:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 20:15:46,356 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-18 20:15:46,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:46,361 INFO L225 Difference]: With dead ends: 53 [2021-12-18 20:15:46,361 INFO L226 Difference]: Without dead ends: 51 [2021-12-18 20:15:46,363 INFO L932 BasicCegarLoop]: 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 [2021-12-18 20:15:46,366 INFO L933 BasicCegarLoop]: 57 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, 57 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 [2021-12-18 20:15:46,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:15:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-18 20:15:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-18 20:15:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 20:15:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-12-18 20:15:46,400 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 16 [2021-12-18 20:15:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:46,400 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-12-18 20:15:46,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 20:15:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-12-18 20:15:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 20:15:46,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:46,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:46,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 20:15:46,403 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:15:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:46,405 INFO L85 PathProgramCache]: Analyzing trace with hash -469563096, now seen corresponding path program 1 times [2021-12-18 20:15:46,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:46,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556797049] [2021-12-18 20:15:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:46,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:15:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:46,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:46,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556797049] [2021-12-18 20:15:46,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556797049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:15:46,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:15:46,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:15:46,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083594468] [2021-12-18 20:15:46,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:15:46,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:15:46,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:15:46,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:15:46,544 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 20:15:46,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:46,663 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2021-12-18 20:15:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:15:46,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-18 20:15:46,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:46,666 INFO L225 Difference]: With dead ends: 96 [2021-12-18 20:15:46,666 INFO L226 Difference]: Without dead ends: 96 [2021-12-18 20:15:46,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:15:46,667 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 47 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:46,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 270 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:15:46,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-18 20:15:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2021-12-18 20:15:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 58 states have internal predecessors, (69), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-18 20:15:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-12-18 20:15:46,677 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 16 [2021-12-18 20:15:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:46,677 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-12-18 20:15:46,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 20:15:46,678 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-12-18 20:15:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 20:15:46,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:46,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:46,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 20:15:46,679 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:15:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:46,680 INFO L85 PathProgramCache]: Analyzing trace with hash -470922749, now seen corresponding path program 1 times [2021-12-18 20:15:46,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:46,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194106019] [2021-12-18 20:15:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:46,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:15:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 20:15:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:46,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:46,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194106019] [2021-12-18 20:15:46,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194106019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:15:46,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:15:46,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:15:46,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450959845] [2021-12-18 20:15:46,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:15:46,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:15:46,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:46,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:15:46,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:15:46,732 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:46,747 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2021-12-18 20:15:46,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:15:46,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2021-12-18 20:15:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:46,750 INFO L225 Difference]: With dead ends: 73 [2021-12-18 20:15:46,751 INFO L226 Difference]: Without dead ends: 73 [2021-12-18 20:15:46,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:15:46,753 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 14 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:46,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 139 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:15:46,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-18 20:15:46,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-18 20:15:46,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.511111111111111) internal successors, (68), 57 states have internal predecessors, (68), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-18 20:15:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2021-12-18 20:15:46,769 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 16 [2021-12-18 20:15:46,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:46,770 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2021-12-18 20:15:46,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2021-12-18 20:15:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 20:15:46,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:46,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:46,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 20:15:46,771 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:15:46,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:46,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1713703289, now seen corresponding path program 1 times [2021-12-18 20:15:46,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:46,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103162201] [2021-12-18 20:15:46,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:46,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:15:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 20:15:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:46,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:46,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103162201] [2021-12-18 20:15:46,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103162201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:15:46,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:15:46,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:15:46,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265230036] [2021-12-18 20:15:46,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:15:46,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:15:46,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:46,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:15:46,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:15:46,812 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:46,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:46,829 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2021-12-18 20:15:46,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:15:46,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2021-12-18 20:15:46,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:46,830 INFO L225 Difference]: With dead ends: 72 [2021-12-18 20:15:46,830 INFO L226 Difference]: Without dead ends: 72 [2021-12-18 20:15:46,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:15:46,831 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 11 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:46,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 131 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:15:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-18 20:15:46,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-12-18 20:15:46,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.488888888888889) internal successors, (67), 56 states have internal predecessors, (67), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-18 20:15:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-12-18 20:15:46,836 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 17 [2021-12-18 20:15:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:46,837 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-12-18 20:15:46,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-12-18 20:15:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 20:15:46,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:46,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:46,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 20:15:46,838 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:15:46,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:46,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1585194363, now seen corresponding path program 1 times [2021-12-18 20:15:46,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:46,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675242997] [2021-12-18 20:15:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:46,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:15:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 20:15:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:46,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:46,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675242997] [2021-12-18 20:15:46,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675242997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:15:46,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:15:46,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:15:46,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242577264] [2021-12-18 20:15:46,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:15:46,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:15:46,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:46,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:15:46,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:15:46,872 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:46,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:46,903 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2021-12-18 20:15:46,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:15:46,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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 18 [2021-12-18 20:15:46,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:46,906 INFO L225 Difference]: With dead ends: 71 [2021-12-18 20:15:46,906 INFO L226 Difference]: Without dead ends: 71 [2021-12-18 20:15:46,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:15:46,907 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:46,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 115 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:15:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-18 20:15:46,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-12-18 20:15:46,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 55 states have internal predecessors, (66), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-18 20:15:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-12-18 20:15:46,915 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 18 [2021-12-18 20:15:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:46,915 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-12-18 20:15:46,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-12-18 20:15:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 20:15:46,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:46,916 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:46,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 20:15:46,917 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:15:46,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:46,920 INFO L85 PathProgramCache]: Analyzing trace with hash -41793692, now seen corresponding path program 1 times [2021-12-18 20:15:46,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:46,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842165780] [2021-12-18 20:15:46,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:46,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:15:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 20:15:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:46,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:46,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842165780] [2021-12-18 20:15:46,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842165780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:15:46,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:15:46,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:15:46,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757811722] [2021-12-18 20:15:46,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:15:46,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:15:46,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:46,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:15:46,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:15:46,988 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:47,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:47,053 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2021-12-18 20:15:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:15:47,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-12-18 20:15:47,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:47,055 INFO L225 Difference]: With dead ends: 67 [2021-12-18 20:15:47,055 INFO L226 Difference]: Without dead ends: 67 [2021-12-18 20:15:47,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:15:47,056 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 42 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:47,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 98 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:15:47,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-18 20:15:47,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-18 20:15:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.288888888888889) internal successors, (58), 51 states have internal predecessors, (58), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-18 20:15:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-12-18 20:15:47,064 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 19 [2021-12-18 20:15:47,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:47,065 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-12-18 20:15:47,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:47,066 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-12-18 20:15:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 20:15:47,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:47,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:47,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 20:15:47,066 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:15:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:47,067 INFO L85 PathProgramCache]: Analyzing trace with hash -41793691, now seen corresponding path program 1 times [2021-12-18 20:15:47,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:47,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167296037] [2021-12-18 20:15:47,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:47,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:47,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:15:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:47,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 20:15:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:47,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:47,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167296037] [2021-12-18 20:15:47,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167296037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:15:47,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:15:47,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:15:47,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945404538] [2021-12-18 20:15:47,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:15:47,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:15:47,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:47,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:15:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:15:47,198 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:47,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:47,365 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-12-18 20:15:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:15:47,366 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-12-18 20:15:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:47,366 INFO L225 Difference]: With dead ends: 84 [2021-12-18 20:15:47,367 INFO L226 Difference]: Without dead ends: 84 [2021-12-18 20:15:47,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-18 20:15:47,367 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 55 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:47,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 165 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:15:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-18 20:15:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2021-12-18 20:15:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 51 states have internal predecessors, (57), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-18 20:15:47,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2021-12-18 20:15:47,371 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 19 [2021-12-18 20:15:47,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:47,372 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2021-12-18 20:15:47,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2021-12-18 20:15:47,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 20:15:47,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:47,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:47,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 20:15:47,373 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:15:47,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:47,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1896384950, now seen corresponding path program 1 times [2021-12-18 20:15:47,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:47,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392814410] [2021-12-18 20:15:47,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:47,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:47,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:15:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:47,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 20:15:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:47,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:47,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392814410] [2021-12-18 20:15:47,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392814410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:15:47,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:15:47,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:15:47,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84712348] [2021-12-18 20:15:47,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:15:47,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:15:47,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:47,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:15:47,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:15:47,490 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:47,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:47,538 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2021-12-18 20:15:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:15:47,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 19 [2021-12-18 20:15:47,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:47,539 INFO L225 Difference]: With dead ends: 66 [2021-12-18 20:15:47,539 INFO L226 Difference]: Without dead ends: 61 [2021-12-18 20:15:47,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:15:47,539 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:47,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 138 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:15:47,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-18 20:15:47,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-18 20:15:47,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.3) internal successors, (52), 46 states have internal predecessors, (52), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:15:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-12-18 20:15:47,543 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 19 [2021-12-18 20:15:47,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:47,551 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-12-18 20:15:47,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:47,551 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-12-18 20:15:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 20:15:47,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:47,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:47,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 20:15:47,552 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:15:47,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:47,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1295604444, now seen corresponding path program 1 times [2021-12-18 20:15:47,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:47,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967422520] [2021-12-18 20:15:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:47,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:47,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:15:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:47,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 20:15:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:47,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:47,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967422520] [2021-12-18 20:15:47,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967422520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:15:47,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:15:47,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 20:15:47,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690490474] [2021-12-18 20:15:47,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:15:47,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:15:47,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:47,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:15:47,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:15:47,673 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:47,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:47,839 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2021-12-18 20:15:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 20:15:47,840 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-12-18 20:15:47,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:47,841 INFO L225 Difference]: With dead ends: 75 [2021-12-18 20:15:47,841 INFO L226 Difference]: Without dead ends: 75 [2021-12-18 20:15:47,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:15:47,841 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 49 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:47,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 183 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:15:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-18 20:15:47,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2021-12-18 20:15:47,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.275) internal successors, (51), 46 states have internal predecessors, (51), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:15:47,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-12-18 20:15:47,845 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 20 [2021-12-18 20:15:47,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:47,845 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-12-18 20:15:47,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:47,845 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-12-18 20:15:47,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 20:15:47,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:47,846 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:47,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-18 20:15:47,847 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:15:47,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:47,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1218286843, now seen corresponding path program 1 times [2021-12-18 20:15:47,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:47,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47376949] [2021-12-18 20:15:47,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:47,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:47,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:15:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:47,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 20:15:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:47,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:47,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47376949] [2021-12-18 20:15:47,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47376949] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:15:47,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50642805] [2021-12-18 20:15:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:47,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:15:47,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:15:47,917 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:15:47,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 20:15:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:47,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 20:15:47,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:15:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:48,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:15:48,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50642805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:15:48,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:15:48,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2021-12-18 20:15:48,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526316587] [2021-12-18 20:15:48,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:15:48,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:15:48,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:48,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:15:48,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:15:48,141 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:48,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:48,246 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2021-12-18 20:15:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:15:48,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-18 20:15:48,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:48,247 INFO L225 Difference]: With dead ends: 79 [2021-12-18 20:15:48,247 INFO L226 Difference]: Without dead ends: 79 [2021-12-18 20:15:48,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-18 20:15:48,248 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 81 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:48,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 201 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:15:48,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-18 20:15:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2021-12-18 20:15:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.255813953488372) internal successors, (54), 49 states have internal predecessors, (54), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:15:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-12-18 20:15:48,251 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 28 [2021-12-18 20:15:48,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:48,252 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-12-18 20:15:48,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:15:48,252 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-12-18 20:15:48,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 20:15:48,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:48,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:48,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 20:15:48,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-18 20:15:48,467 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:15:48,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1513604786, now seen corresponding path program 1 times [2021-12-18 20:15:48,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:48,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705829875] [2021-12-18 20:15:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:48,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:48,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:15:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:48,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 20:15:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:48,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 20:15:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:15:48,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:48,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705829875] [2021-12-18 20:15:48,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705829875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:15:48,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20717157] [2021-12-18 20:15:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:48,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:15:48,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:15:48,603 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:15:48,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 20:15:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:48,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-18 20:15:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:15:48,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:15:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:48,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:15:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:15:49,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20717157] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:15:49,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:15:49,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-18 20:15:49,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119101602] [2021-12-18 20:15:49,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:15:49,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 20:15:49,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:49,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 20:15:49,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-12-18 20:15:49,413 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 20 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 10 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 20:15:49,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:49,863 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2021-12-18 20:15:49,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 20:15:49,863 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 10 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 31 [2021-12-18 20:15:49,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:49,864 INFO L225 Difference]: With dead ends: 95 [2021-12-18 20:15:49,864 INFO L226 Difference]: Without dead ends: 95 [2021-12-18 20:15:49,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-12-18 20:15:49,865 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 168 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:49,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 339 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 514 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time] [2021-12-18 20:15:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-18 20:15:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 64. [2021-12-18 20:15:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 48 states have internal predecessors, (53), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:15:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-12-18 20:15:49,868 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 31 [2021-12-18 20:15:49,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:49,869 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-12-18 20:15:49,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 10 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 20:15:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-12-18 20:15:49,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 20:15:49,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:49,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:49,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 20:15:50,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-18 20:15:50,072 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:15:50,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:50,072 INFO L85 PathProgramCache]: Analyzing trace with hash -322891913, now seen corresponding path program 1 times [2021-12-18 20:15:50,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:50,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153450830] [2021-12-18 20:15:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:50,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:50,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:15:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:50,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 20:15:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:50,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 20:15:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:15:50,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:50,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153450830] [2021-12-18 20:15:50,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153450830] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:15:50,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791058577] [2021-12-18 20:15:50,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:50,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:15:50,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:15:50,198 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:15:50,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 20:15:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:50,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-18 20:15:50,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:15:50,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:15:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:50,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:15:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:15:50,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791058577] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:15:50,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:15:50,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-18 20:15:50,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878524791] [2021-12-18 20:15:50,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:15:50,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 20:15:50,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:50,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 20:15:50,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-12-18 20:15:50,947 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 20 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 20:15:51,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:51,531 INFO L93 Difference]: Finished difference Result 129 states and 154 transitions. [2021-12-18 20:15:51,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 20:15:51,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 32 [2021-12-18 20:15:51,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:51,532 INFO L225 Difference]: With dead ends: 129 [2021-12-18 20:15:51,532 INFO L226 Difference]: Without dead ends: 129 [2021-12-18 20:15:51,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2021-12-18 20:15:51,533 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 243 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:51,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 317 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 553 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2021-12-18 20:15:51,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-18 20:15:51,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 40. [2021-12-18 20:15:51,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 30 states have internal predecessors, (32), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 20:15:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-12-18 20:15:51,536 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 32 [2021-12-18 20:15:51,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:51,537 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-12-18 20:15:51,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-18 20:15:51,537 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-12-18 20:15:51,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 20:15:51,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:51,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:51,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 20:15:51,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:15:51,738 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:15:51,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:51,739 INFO L85 PathProgramCache]: Analyzing trace with hash -682717183, now seen corresponding path program 1 times [2021-12-18 20:15:51,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:51,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808484669] [2021-12-18 20:15:51,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:51,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:51,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:15:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:51,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 20:15:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:51,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-18 20:15:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:51,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-18 20:15:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:15:51,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:51,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808484669] [2021-12-18 20:15:51,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808484669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:15:51,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018475648] [2021-12-18 20:15:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:51,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:15:51,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:15:51,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:15:51,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 20:15:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:51,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 20:15:51,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:15:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:15:52,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:15:52,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-12-18 20:15:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:15:52,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018475648] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:15:52,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:15:52,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2021-12-18 20:15:52,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950587727] [2021-12-18 20:15:52,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:15:52,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 20:15:52,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:52,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 20:15:52,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-12-18 20:15:52,446 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-18 20:15:52,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:52,933 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2021-12-18 20:15:52,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 20:15:52,934 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 33 [2021-12-18 20:15:52,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:52,935 INFO L225 Difference]: With dead ends: 86 [2021-12-18 20:15:52,935 INFO L226 Difference]: Without dead ends: 86 [2021-12-18 20:15:52,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 20:15:52,936 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 202 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:52,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 357 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:15:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-18 20:15:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 39. [2021-12-18 20:15:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 20:15:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-12-18 20:15:52,938 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 33 [2021-12-18 20:15:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:52,938 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-12-18 20:15:52,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-18 20:15:52,939 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-12-18 20:15:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-18 20:15:52,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:52,939 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:52,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 20:15:53,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:15:53,146 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:15:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:53,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1038783170, now seen corresponding path program 1 times [2021-12-18 20:15:53,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:53,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570132973] [2021-12-18 20:15:53,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:53,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:53,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:15:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:53,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 20:15:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:53,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-18 20:15:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:53,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-18 20:15:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:15:53,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:53,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570132973] [2021-12-18 20:15:53,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570132973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:15:53,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722062736] [2021-12-18 20:15:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:53,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:15:53,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:15:53,304 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:15:53,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 20:15:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:53,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 20:15:53,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:15:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:53,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:15:53,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-18 20:15:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:15:54,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722062736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:15:54,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:15:54,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 35 [2021-12-18 20:15:54,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353853176] [2021-12-18 20:15:54,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:15:54,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 20:15:54,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:54,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 20:15:54,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 20:15:54,116 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 36 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 30 states have internal predecessors, (56), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:15:55,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:55,306 INFO L93 Difference]: Finished difference Result 153 states and 195 transitions. [2021-12-18 20:15:55,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-18 20:15:55,306 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 30 states have internal predecessors, (56), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 35 [2021-12-18 20:15:55,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:55,307 INFO L225 Difference]: With dead ends: 153 [2021-12-18 20:15:55,307 INFO L226 Difference]: Without dead ends: 153 [2021-12-18 20:15:55,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=468, Invalid=3314, Unknown=0, NotChecked=0, Total=3782 [2021-12-18 20:15:55,309 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 309 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:55,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 841 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1008 Invalid, 0 Unknown, 287 Unchecked, 0.5s Time] [2021-12-18 20:15:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-18 20:15:55,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2021-12-18 20:15:55,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 77 states have (on average 1.12987012987013) internal successors, (87), 84 states have internal predecessors, (87), 22 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (38), 21 states have call predecessors, (38), 21 states have call successors, (38) [2021-12-18 20:15:55,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 147 transitions. [2021-12-18 20:15:55,322 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 147 transitions. Word has length 35 [2021-12-18 20:15:55,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:55,322 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 147 transitions. [2021-12-18 20:15:55,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 30 states have internal predecessors, (56), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:15:55,322 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 147 transitions. [2021-12-18 20:15:55,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 20:15:55,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:55,323 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:55,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-18 20:15:55,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-18 20:15:55,542 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:15:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:55,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1388154949, now seen corresponding path program 1 times [2021-12-18 20:15:55,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:55,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249906689] [2021-12-18 20:15:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:55,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:55,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:15:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:55,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 20:15:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:55,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-18 20:15:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:55,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-18 20:15:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:15:55,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:55,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249906689] [2021-12-18 20:15:55,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249906689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:15:55,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925512524] [2021-12-18 20:15:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:55,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:15:55,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:15:55,647 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:15:55,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 20:15:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:55,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 20:15:55,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:15:55,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-12-18 20:15:57,751 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_19 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_19) ((as const (Array Int Int)) 0))) is different from true [2021-12-18 20:15:59,776 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_20 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_20) ((as const (Array Int Int)) 0))) is different from true [2021-12-18 20:16:01,797 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_21 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_21) ((as const (Array Int Int)) 0))) is different from true [2021-12-18 20:16:01,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-12-18 20:16:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-18 20:16:01,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:16:04,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925512524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:16:04,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:16:04,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-12-18 20:16:04,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101716230] [2021-12-18 20:16:04,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:16:04,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 20:16:04,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:16:04,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 20:16:04,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=492, Unknown=3, NotChecked=138, Total=702 [2021-12-18 20:16:04,061 INFO L87 Difference]: Start difference. First operand 113 states and 147 transitions. Second operand has 22 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 6 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-18 20:16:04,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:16:04,245 INFO L93 Difference]: Finished difference Result 115 states and 148 transitions. [2021-12-18 20:16:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 20:16:04,246 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 6 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 40 [2021-12-18 20:16:04,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:16:04,248 INFO L225 Difference]: With dead ends: 115 [2021-12-18 20:16:04,248 INFO L226 Difference]: Without dead ends: 115 [2021-12-18 20:16:04,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=125, Invalid=814, Unknown=3, NotChecked=180, Total=1122 [2021-12-18 20:16:04,249 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 29 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:16:04,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 297 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 258 Unchecked, 0.1s Time] [2021-12-18 20:16:04,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-18 20:16:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-12-18 20:16:04,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 85 states have internal predecessors, (88), 22 states have call successors, (22), 8 states have call predecessors, (22), 13 states have return successors, (38), 21 states have call predecessors, (38), 21 states have call successors, (38) [2021-12-18 20:16:04,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 148 transitions. [2021-12-18 20:16:04,260 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 148 transitions. Word has length 40 [2021-12-18 20:16:04,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:16:04,260 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 148 transitions. [2021-12-18 20:16:04,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 6 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-18 20:16:04,261 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 148 transitions. [2021-12-18 20:16:04,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-18 20:16:04,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:16:04,265 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:16:04,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 20:16:04,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-18 20:16:04,475 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:16:04,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:16:04,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1870573688, now seen corresponding path program 1 times [2021-12-18 20:16:04,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:16:04,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818544186] [2021-12-18 20:16:04,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:16:04,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:16:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:04,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:16:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:04,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 20:16:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:04,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 20:16:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:04,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 20:16:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:04,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:16:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:04,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:16:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:04,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 20:16:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:04,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 20:16:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:04,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 20:16:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-18 20:16:04,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:16:04,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818544186] [2021-12-18 20:16:04,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818544186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:16:04,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274382560] [2021-12-18 20:16:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:16:04,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:16:04,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:16:04,590 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:16:04,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 20:16:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:04,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 20:16:04,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:16:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 20:16:05,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:16:06,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274382560] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:16:06,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:16:06,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18] total 25 [2021-12-18 20:16:06,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857082213] [2021-12-18 20:16:06,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:16:06,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 20:16:06,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:16:06,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 20:16:06,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2021-12-18 20:16:06,145 INFO L87 Difference]: Start difference. First operand 115 states and 148 transitions. Second operand has 25 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 11 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 20:16:07,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:16:07,846 INFO L93 Difference]: Finished difference Result 197 states and 248 transitions. [2021-12-18 20:16:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-18 20:16:07,847 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 11 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) Word has length 77 [2021-12-18 20:16:07,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:16:07,848 INFO L225 Difference]: With dead ends: 197 [2021-12-18 20:16:07,848 INFO L226 Difference]: Without dead ends: 175 [2021-12-18 20:16:07,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=491, Invalid=3415, Unknown=0, NotChecked=0, Total=3906 [2021-12-18 20:16:07,850 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 263 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:16:07,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 937 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1064 Invalid, 0 Unknown, 70 Unchecked, 0.6s Time] [2021-12-18 20:16:07,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-18 20:16:07,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 136. [2021-12-18 20:16:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 98 states have internal predecessors, (104), 25 states have call successors, (25), 9 states have call predecessors, (25), 14 states have return successors, (43), 28 states have call predecessors, (43), 24 states have call successors, (43) [2021-12-18 20:16:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 172 transitions. [2021-12-18 20:16:07,874 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 172 transitions. Word has length 77 [2021-12-18 20:16:07,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:16:07,875 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 172 transitions. [2021-12-18 20:16:07,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 11 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 20:16:07,875 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 172 transitions. [2021-12-18 20:16:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-18 20:16:07,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:16:07,877 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2021-12-18 20:16:07,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 20:16:08,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:16:08,094 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:16:08,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:16:08,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1737991961, now seen corresponding path program 1 times [2021-12-18 20:16:08,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:16:08,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200834603] [2021-12-18 20:16:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:16:08,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:16:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:08,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:16:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:08,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 20:16:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:08,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-18 20:16:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:08,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:16:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:08,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:16:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:08,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 20:16:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:08,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 20:16:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:08,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 20:16:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 20:16:08,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:16:08,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200834603] [2021-12-18 20:16:08,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200834603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:16:08,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398734762] [2021-12-18 20:16:08,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:16:08,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:16:08,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:16:08,384 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) [2021-12-18 20:16:08,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 20:16:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:08,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 20:16:08,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:16:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 20:16:08,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:16:09,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398734762] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:16:09,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:16:09,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 29 [2021-12-18 20:16:09,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625605749] [2021-12-18 20:16:09,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:16:09,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 20:16:09,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:16:09,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 20:16:09,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 20:16:09,800 INFO L87 Difference]: Start difference. First operand 136 states and 172 transitions. Second operand has 30 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 25 states have internal predecessors, (59), 14 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-18 20:16:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:16:11,196 INFO L93 Difference]: Finished difference Result 177 states and 222 transitions. [2021-12-18 20:16:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 20:16:11,197 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 25 states have internal predecessors, (59), 14 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 65 [2021-12-18 20:16:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:16:11,198 INFO L225 Difference]: With dead ends: 177 [2021-12-18 20:16:11,198 INFO L226 Difference]: Without dead ends: 108 [2021-12-18 20:16:11,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=439, Invalid=3101, Unknown=0, NotChecked=0, Total=3540 [2021-12-18 20:16:11,199 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 217 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:16:11,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 850 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 924 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2021-12-18 20:16:11,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-18 20:16:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2021-12-18 20:16:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 63 states have internal predecessors, (65), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (23), 15 states have call predecessors, (23), 16 states have call successors, (23) [2021-12-18 20:16:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2021-12-18 20:16:11,204 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 65 [2021-12-18 20:16:11,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:16:11,204 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2021-12-18 20:16:11,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 25 states have internal predecessors, (59), 14 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-18 20:16:11,205 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2021-12-18 20:16:11,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-18 20:16:11,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:16:11,206 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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] [2021-12-18 20:16:11,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 20:16:11,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-18 20:16:11,415 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-18 20:16:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:16:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1810378519, now seen corresponding path program 2 times [2021-12-18 20:16:11,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:16:11,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526890919] [2021-12-18 20:16:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:16:11,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:16:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:11,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:16:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:11,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 20:16:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:11,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-18 20:16:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:11,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 20:16:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:11,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:16:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:11,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 20:16:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:11,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 20:16:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:11,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 20:16:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-18 20:16:11,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:16:11,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526890919] [2021-12-18 20:16:11,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526890919] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:16:11,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802799717] [2021-12-18 20:16:11,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:16:11,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:16:11,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:16:11,591 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) [2021-12-18 20:16:11,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 20:16:11,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:16:11,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:16:11,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 20:16:11,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:16:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 20:16:12,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:16:12,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802799717] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:16:12,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:16:12,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 27 [2021-12-18 20:16:12,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992096807] [2021-12-18 20:16:12,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:16:12,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 20:16:12,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:16:12,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 20:16:12,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2021-12-18 20:16:12,956 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand has 27 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 13 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-18 20:16:13,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:16:13,263 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-12-18 20:16:13,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 20:16:13,263 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 13 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) Word has length 65 [2021-12-18 20:16:13,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:16:13,263 INFO L225 Difference]: With dead ends: 30 [2021-12-18 20:16:13,264 INFO L226 Difference]: Without dead ends: 0 [2021-12-18 20:16:13,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=1402, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 20:16:13,264 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:16:13,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 236 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 158 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2021-12-18 20:16:13,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-18 20:16:13,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-18 20:16:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:16:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-18 20:16:13,265 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2021-12-18 20:16:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:16:13,266 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-18 20:16:13,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 13 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-18 20:16:13,266 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-18 20:16:13,266 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-18 20:16:13,268 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE (12 of 13 remaining) [2021-12-18 20:16:13,268 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE (11 of 13 remaining) [2021-12-18 20:16:13,268 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (10 of 13 remaining) [2021-12-18 20:16:13,269 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2021-12-18 20:16:13,269 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATION (8 of 13 remaining) [2021-12-18 20:16:13,269 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATION (7 of 13 remaining) [2021-12-18 20:16:13,269 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATION (6 of 13 remaining) [2021-12-18 20:16:13,269 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATION (5 of 13 remaining) [2021-12-18 20:16:13,269 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATION (4 of 13 remaining) [2021-12-18 20:16:13,269 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATION (3 of 13 remaining) [2021-12-18 20:16:13,269 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATION (2 of 13 remaining) [2021-12-18 20:16:13,270 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATION (1 of 13 remaining) [2021-12-18 20:16:13,270 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2021-12-18 20:16:13,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 20:16:13,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-18 20:16:13,484 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:16:13,484 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 20:16:13,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 08:16:13 BoogieIcfgContainer [2021-12-18 20:16:13,487 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 20:16:13,487 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 20:16:13,488 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 20:16:13,488 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 20:16:13,489 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:15:46" (3/4) ... [2021-12-18 20:16:13,490 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-18 20:16:13,494 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-12-18 20:16:13,494 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-12-18 20:16:13,495 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-18 20:16:13,500 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2021-12-18 20:16:13,500 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-12-18 20:16:13,500 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-18 20:16:13,500 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-18 20:16:13,523 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-18 20:16:13,523 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 20:16:13,524 INFO L158 Benchmark]: Toolchain (without parser) took 27994.77ms. Allocated memory was 92.3MB in the beginning and 151.0MB in the end (delta: 58.7MB). Free memory was 61.5MB in the beginning and 50.7MB in the end (delta: 10.8MB). Peak memory consumption was 69.8MB. Max. memory is 16.1GB. [2021-12-18 20:16:13,524 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 92.3MB. Free memory was 49.5MB in the beginning and 49.4MB in the end (delta: 43.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 20:16:13,524 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.78ms. Allocated memory is still 92.3MB. Free memory was 61.3MB in the beginning and 68.1MB in the end (delta: -6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 20:16:13,524 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.54ms. Allocated memory is still 92.3MB. Free memory was 68.1MB in the beginning and 66.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 20:16:13,524 INFO L158 Benchmark]: Boogie Preprocessor took 14.25ms. Allocated memory is still 92.3MB. Free memory was 66.6MB in the beginning and 65.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 20:16:13,525 INFO L158 Benchmark]: RCFGBuilder took 291.63ms. Allocated memory is still 92.3MB. Free memory was 65.4MB in the beginning and 53.5MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-18 20:16:13,525 INFO L158 Benchmark]: TraceAbstraction took 27450.51ms. Allocated memory was 92.3MB in the beginning and 151.0MB in the end (delta: 58.7MB). Free memory was 53.1MB in the beginning and 53.7MB in the end (delta: -639.9kB). Peak memory consumption was 60.3MB. Max. memory is 16.1GB. [2021-12-18 20:16:13,525 INFO L158 Benchmark]: Witness Printer took 35.90ms. Allocated memory is still 151.0MB. Free memory was 53.7MB in the beginning and 50.7MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 20:16:13,526 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 92.3MB. Free memory was 49.5MB in the beginning and 49.4MB in the end (delta: 43.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 177.78ms. Allocated memory is still 92.3MB. Free memory was 61.3MB in the beginning and 68.1MB in the end (delta: -6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.54ms. Allocated memory is still 92.3MB. Free memory was 68.1MB in the beginning and 66.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.25ms. Allocated memory is still 92.3MB. Free memory was 66.6MB in the beginning and 65.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 291.63ms. Allocated memory is still 92.3MB. Free memory was 65.4MB in the beginning and 53.5MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 27450.51ms. Allocated memory was 92.3MB in the beginning and 151.0MB in the end (delta: 58.7MB). Free memory was 53.1MB in the beginning and 53.7MB in the end (delta: -639.9kB). Peak memory consumption was 60.3MB. Max. memory is 16.1GB. * Witness Printer took 35.90ms. Allocated memory is still 151.0MB. Free memory was 53.7MB in the beginning and 50.7MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 41]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 53 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 27.4s, OverallIterations: 18, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1776 SdHoareTripleChecker+Valid, 3.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1761 mSDsluCounter, 5671 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 826 IncrementalHoareTripleChecker+Unchecked, 4802 mSDsCounter, 998 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5552 IncrementalHoareTripleChecker+Invalid, 7376 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 998 mSolverCounterUnsat, 869 mSDtfsCounter, 5552 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1020 GetRequests, 588 SyntacticMatches, 32 SemanticMatches, 400 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2712 ImplicationChecksByTransitivity, 14.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=136occurred in iteration=16, InterpolantAutomatonStates: 246, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 335 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 17.2s InterpolantComputationTime, 972 NumberOfCodeBlocks, 972 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1072 ConstructedInterpolants, 47 QuantifiedInterpolants, 6911 SizeOfPredicates, 92 NumberOfNonLiveVariables, 1833 ConjunctsInSsa, 241 ConjunctsInUnsatCore, 31 InterpolantComputations, 10 PerfectInterpolantSequences, 277/437 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-18 20:16:13,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE