./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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/memsafety-bftpd/bftpd_2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:57:29,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:57:29,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:57:29,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:57:29,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:57:29,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:57:29,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:57:29,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:57:29,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:57:29,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:57:29,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:57:29,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:57:29,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:57:29,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:57:29,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:57:29,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:57:29,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:57:29,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:57:29,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:57:29,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:57:29,735 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:57:29,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:57:29,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:57:29,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:57:29,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:57:29,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:57:29,746 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:57:29,746 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:57:29,747 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:57:29,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:57:29,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:57:29,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:57:29,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:57:29,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:57:29,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:57:29,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:57:29,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:57:29,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:57:29,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:57:29,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:57:29,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:57:29,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:57:29,759 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:57:29,802 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:57:29,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:57:29,803 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:57:29,803 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:57:29,804 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:57:29,804 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:57:29,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:57:29,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:57:29,805 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:57:29,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:57:29,806 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:57:29,806 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:57:29,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:57:29,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:57:29,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:57:29,807 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:57:29,807 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:57:29,808 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:57:29,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:57:29,808 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:57:29,808 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:57:29,808 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:57:29,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:57:29,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:57:29,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:57:29,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:57:29,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:57:29,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:57:29,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:57:29,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:57:29,810 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-07-21 17:57:30,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:57:30,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:57:30,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:57:30,150 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:57:30,151 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:57:30,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-07-21 17:57:30,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d6ad170b/8e519ddb6112415c8ca6341d2fb5a1fe/FLAG0cf1f5ed2 [2022-07-21 17:57:30,694 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:57:30,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-07-21 17:57:30,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d6ad170b/8e519ddb6112415c8ca6341d2fb5a1fe/FLAG0cf1f5ed2 [2022-07-21 17:57:31,038 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d6ad170b/8e519ddb6112415c8ca6341d2fb5a1fe [2022-07-21 17:57:31,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:57:31,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:57:31,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:57:31,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:57:31,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:57:31,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:57:31" (1/1) ... [2022-07-21 17:57:31,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ff1d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:57:31, skipping insertion in model container [2022-07-21 17:57:31,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:57:31" (1/1) ... [2022-07-21 17:57:31,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:57:31,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:57:31,448 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:57:31,462 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:57:31,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:57:31,560 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:57:31,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:57:31 WrapperNode [2022-07-21 17:57:31,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:57:31,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:57:31,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:57:31,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:57:31,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:57:31" (1/1) ... [2022-07-21 17:57:31,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:57:31" (1/1) ... [2022-07-21 17:57:31,635 INFO L137 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2022-07-21 17:57:31,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:57:31,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:57:31,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:57:31,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:57:31,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:57:31" (1/1) ... [2022-07-21 17:57:31,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:57:31" (1/1) ... [2022-07-21 17:57:31,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:57:31" (1/1) ... [2022-07-21 17:57:31,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:57:31" (1/1) ... [2022-07-21 17:57:31,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:57:31" (1/1) ... [2022-07-21 17:57:31,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:57:31" (1/1) ... [2022-07-21 17:57:31,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:57:31" (1/1) ... [2022-07-21 17:57:31,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:57:31,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:57:31,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:57:31,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:57:31,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:57:31" (1/1) ... [2022-07-21 17:57:31,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:57:31,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:31,717 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 17:57:31,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 17:57:31,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 17:57:31,761 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-07-21 17:57:31,762 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-07-21 17:57:31,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:57:31,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:57:31,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:57:31,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:57:31,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 17:57:31,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 17:57:31,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:57:31,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:57:31,856 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:57:31,857 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:57:32,106 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:57:32,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:57:32,115 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 17:57:32,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:57:32 BoogieIcfgContainer [2022-07-21 17:57:32,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:57:32,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:57:32,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:57:32,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:57:32,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:57:31" (1/3) ... [2022-07-21 17:57:32,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6684d721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:57:32, skipping insertion in model container [2022-07-21 17:57:32,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:57:31" (2/3) ... [2022-07-21 17:57:32,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6684d721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:57:32, skipping insertion in model container [2022-07-21 17:57:32,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:57:32" (3/3) ... [2022-07-21 17:57:32,124 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-07-21 17:57:32,136 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:57:32,137 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-07-21 17:57:32,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:57:32,189 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6fa8ee1d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e9cfc4d [2022-07-21 17:57:32,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-07-21 17:57:32,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:57:32,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:57:32,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:32,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:57:32,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:32,221 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2022-07-21 17:57:32,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:32,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726787027] [2022-07-21 17:57:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:32,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:32,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:32,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726787027] [2022-07-21 17:57:32,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726787027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:32,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:57:32,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:57:32,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436168031] [2022-07-21 17:57:32,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:32,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:57:32,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:32,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:57:32,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:57:32,519 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:32,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:32,728 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2022-07-21 17:57:32,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:57:32,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 17:57:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:32,744 INFO L225 Difference]: With dead ends: 124 [2022-07-21 17:57:32,744 INFO L226 Difference]: Without dead ends: 118 [2022-07-21 17:57:32,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:57:32,750 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 149 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:32,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 109 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:57:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-21 17:57:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 92. [2022-07-21 17:57:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 82 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-21 17:57:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 123 transitions. [2022-07-21 17:57:32,793 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 123 transitions. Word has length 6 [2022-07-21 17:57:32,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:32,793 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 123 transitions. [2022-07-21 17:57:32,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:32,794 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 123 transitions. [2022-07-21 17:57:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:57:32,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:32,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:57:32,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:57:32,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:32,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:32,796 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2022-07-21 17:57:32,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:32,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615687236] [2022-07-21 17:57:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:32,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:32,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:32,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615687236] [2022-07-21 17:57:32,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615687236] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:32,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:57:32,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:57:32,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285679862] [2022-07-21 17:57:32,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:32,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:57:32,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:32,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:57:32,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:57:32,884 INFO L87 Difference]: Start difference. First operand 92 states and 123 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:33,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:33,000 INFO L93 Difference]: Finished difference Result 221 states and 308 transitions. [2022-07-21 17:57:33,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:57:33,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 17:57:33,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:33,003 INFO L225 Difference]: With dead ends: 221 [2022-07-21 17:57:33,003 INFO L226 Difference]: Without dead ends: 221 [2022-07-21 17:57:33,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:57:33,005 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 120 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:33,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 207 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:57:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-21 17:57:33,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 168. [2022-07-21 17:57:33,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 133 states have (on average 1.6240601503759398) internal successors, (216), 150 states have internal predecessors, (216), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-21 17:57:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 261 transitions. [2022-07-21 17:57:33,030 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 261 transitions. Word has length 6 [2022-07-21 17:57:33,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:33,030 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 261 transitions. [2022-07-21 17:57:33,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 261 transitions. [2022-07-21 17:57:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:57:33,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:33,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:33,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 17:57:33,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:33,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:33,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2022-07-21 17:57:33,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:33,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716179722] [2022-07-21 17:57:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:33,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:33,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:33,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716179722] [2022-07-21 17:57:33,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716179722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:33,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:57:33,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:57:33,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92806881] [2022-07-21 17:57:33,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:33,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:57:33,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:33,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:57:33,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:57:33,169 INFO L87 Difference]: Start difference. First operand 168 states and 261 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:33,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:33,321 INFO L93 Difference]: Finished difference Result 244 states and 348 transitions. [2022-07-21 17:57:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:57:33,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 17:57:33,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:33,326 INFO L225 Difference]: With dead ends: 244 [2022-07-21 17:57:33,327 INFO L226 Difference]: Without dead ends: 244 [2022-07-21 17:57:33,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:57:33,332 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 136 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:33,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 162 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:57:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-21 17:57:33,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 171. [2022-07-21 17:57:33,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 136 states have (on average 1.6102941176470589) internal successors, (219), 153 states have internal predecessors, (219), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-21 17:57:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 264 transitions. [2022-07-21 17:57:33,364 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 264 transitions. Word has length 7 [2022-07-21 17:57:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:33,365 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 264 transitions. [2022-07-21 17:57:33,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:33,366 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 264 transitions. [2022-07-21 17:57:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 17:57:33,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:33,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:33,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 17:57:33,367 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:33,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:33,368 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2022-07-21 17:57:33,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:33,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302307606] [2022-07-21 17:57:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:33,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:33,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:33,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302307606] [2022-07-21 17:57:33,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302307606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:33,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:57:33,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:57:33,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137018172] [2022-07-21 17:57:33,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:33,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:57:33,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:33,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:57:33,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:57:33,555 INFO L87 Difference]: Start difference. First operand 171 states and 264 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:33,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:33,710 INFO L93 Difference]: Finished difference Result 223 states and 309 transitions. [2022-07-21 17:57:33,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:57:33,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 17:57:33,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:33,712 INFO L225 Difference]: With dead ends: 223 [2022-07-21 17:57:33,712 INFO L226 Difference]: Without dead ends: 223 [2022-07-21 17:57:33,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:57:33,713 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 89 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:33,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 204 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:57:33,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-21 17:57:33,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 171. [2022-07-21 17:57:33,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 136 states have (on average 1.5955882352941178) internal successors, (217), 153 states have internal predecessors, (217), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-21 17:57:33,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 262 transitions. [2022-07-21 17:57:33,724 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 262 transitions. Word has length 8 [2022-07-21 17:57:33,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:33,724 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 262 transitions. [2022-07-21 17:57:33,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:33,725 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 262 transitions. [2022-07-21 17:57:33,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 17:57:33,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:33,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:33,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 17:57:33,726 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:33,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:33,726 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2022-07-21 17:57:33,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:33,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497914276] [2022-07-21 17:57:33,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:33,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:33,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:33,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497914276] [2022-07-21 17:57:33,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497914276] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:33,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:57:33,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:57:33,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388007775] [2022-07-21 17:57:33,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:33,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:57:33,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:57:33,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:57:33,771 INFO L87 Difference]: Start difference. First operand 171 states and 262 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:33,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:33,865 INFO L93 Difference]: Finished difference Result 250 states and 344 transitions. [2022-07-21 17:57:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:57:33,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 17:57:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:33,867 INFO L225 Difference]: With dead ends: 250 [2022-07-21 17:57:33,867 INFO L226 Difference]: Without dead ends: 250 [2022-07-21 17:57:33,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:57:33,868 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 135 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:33,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 193 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:57:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-21 17:57:33,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 207. [2022-07-21 17:57:33,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 170 states have (on average 1.5705882352941176) internal successors, (267), 188 states have internal predecessors, (267), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-21 17:57:33,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 312 transitions. [2022-07-21 17:57:33,879 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 312 transitions. Word has length 9 [2022-07-21 17:57:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:33,880 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 312 transitions. [2022-07-21 17:57:33,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:33,880 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 312 transitions. [2022-07-21 17:57:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 17:57:33,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:33,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:33,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 17:57:33,881 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:33,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:33,881 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2022-07-21 17:57:33,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:33,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656529068] [2022-07-21 17:57:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:33,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:33,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:33,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656529068] [2022-07-21 17:57:33,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656529068] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:33,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:57:33,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:57:33,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129216286] [2022-07-21 17:57:33,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:33,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:57:33,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:33,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:57:33,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:57:33,946 INFO L87 Difference]: Start difference. First operand 207 states and 312 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:34,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:34,020 INFO L93 Difference]: Finished difference Result 245 states and 327 transitions. [2022-07-21 17:57:34,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:57:34,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-21 17:57:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:34,022 INFO L225 Difference]: With dead ends: 245 [2022-07-21 17:57:34,022 INFO L226 Difference]: Without dead ends: 245 [2022-07-21 17:57:34,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:57:34,023 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 160 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:34,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 194 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:57:34,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-21 17:57:34,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 217. [2022-07-21 17:57:34,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 179 states have (on average 1.5642458100558658) internal successors, (280), 198 states have internal predecessors, (280), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-21 17:57:34,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 325 transitions. [2022-07-21 17:57:34,032 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 325 transitions. Word has length 10 [2022-07-21 17:57:34,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:34,032 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 325 transitions. [2022-07-21 17:57:34,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:34,033 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 325 transitions. [2022-07-21 17:57:34,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 17:57:34,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:34,033 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:34,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 17:57:34,034 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:34,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:34,034 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2022-07-21 17:57:34,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:34,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11053511] [2022-07-21 17:57:34,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:34,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:34,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:34,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11053511] [2022-07-21 17:57:34,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11053511] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:34,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586589248] [2022-07-21 17:57:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:34,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:34,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:34,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:34,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 17:57:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:34,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:57:34,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:34,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:34,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586589248] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:34,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:57:34,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2022-07-21 17:57:34,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307541770] [2022-07-21 17:57:34,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:34,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:57:34,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:34,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:57:34,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:57:34,486 INFO L87 Difference]: Start difference. First operand 217 states and 325 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:34,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:34,732 INFO L93 Difference]: Finished difference Result 302 states and 415 transitions. [2022-07-21 17:57:34,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:57:34,733 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-21 17:57:34,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:34,737 INFO L225 Difference]: With dead ends: 302 [2022-07-21 17:57:34,740 INFO L226 Difference]: Without dead ends: 302 [2022-07-21 17:57:34,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-07-21 17:57:34,741 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 415 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:34,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 448 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:57:34,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-07-21 17:57:34,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 229. [2022-07-21 17:57:34,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 188 states have (on average 1.4893617021276595) internal successors, (280), 210 states have internal predecessors, (280), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (44), 11 states have call predecessors, (44), 11 states have call successors, (44) [2022-07-21 17:57:34,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 335 transitions. [2022-07-21 17:57:34,754 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 335 transitions. Word has length 14 [2022-07-21 17:57:34,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:34,755 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 335 transitions. [2022-07-21 17:57:34,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 335 transitions. [2022-07-21 17:57:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 17:57:34,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:34,756 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:34,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 17:57:34,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:34,976 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:34,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:34,976 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2022-07-21 17:57:34,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:34,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227281089] [2022-07-21 17:57:34,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:34,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:35,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:35,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227281089] [2022-07-21 17:57:35,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227281089] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:35,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473507070] [2022-07-21 17:57:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:35,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:35,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:35,092 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:35,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 17:57:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:35,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:57:35,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:35,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-21 17:57:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:35,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:35,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473507070] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:35,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:57:35,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-07-21 17:57:35,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869289721] [2022-07-21 17:57:35,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:35,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:57:35,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:35,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:57:35,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:57:35,354 INFO L87 Difference]: Start difference. First operand 229 states and 335 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:35,650 INFO L93 Difference]: Finished difference Result 335 states and 463 transitions. [2022-07-21 17:57:35,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:57:35,651 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-21 17:57:35,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:35,654 INFO L225 Difference]: With dead ends: 335 [2022-07-21 17:57:35,654 INFO L226 Difference]: Without dead ends: 335 [2022-07-21 17:57:35,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:57:35,655 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 221 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:35,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 411 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:57:35,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-07-21 17:57:35,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 239. [2022-07-21 17:57:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 197 states have (on average 1.482233502538071) internal successors, (292), 220 states have internal predecessors, (292), 11 states have call successors, (11), 7 states have call predecessors, (11), 13 states have return successors, (46), 11 states have call predecessors, (46), 11 states have call successors, (46) [2022-07-21 17:57:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 349 transitions. [2022-07-21 17:57:35,666 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 349 transitions. Word has length 15 [2022-07-21 17:57:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:35,666 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 349 transitions. [2022-07-21 17:57:35,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 349 transitions. [2022-07-21 17:57:35,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 17:57:35,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:35,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:35,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:35,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-21 17:57:35,884 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:35,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:35,884 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2022-07-21 17:57:35,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:35,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231278336] [2022-07-21 17:57:35,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:35,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:36,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:36,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231278336] [2022-07-21 17:57:36,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231278336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:36,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653036993] [2022-07-21 17:57:36,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:36,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:36,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:36,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:36,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 17:57:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:36,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 17:57:36,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:36,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-21 17:57:36,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-21 17:57:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:36,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:36,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653036993] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:36,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:57:36,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-07-21 17:57:36,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860700046] [2022-07-21 17:57:36,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:36,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:57:36,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:36,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:57:36,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:57:36,386 INFO L87 Difference]: Start difference. First operand 239 states and 349 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:36,957 INFO L93 Difference]: Finished difference Result 570 states and 775 transitions. [2022-07-21 17:57:36,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 17:57:36,958 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-21 17:57:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:36,961 INFO L225 Difference]: With dead ends: 570 [2022-07-21 17:57:36,961 INFO L226 Difference]: Without dead ends: 570 [2022-07-21 17:57:36,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:57:36,961 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 502 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:36,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 748 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:57:36,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-07-21 17:57:36,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 347. [2022-07-21 17:57:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 294 states have (on average 1.5136054421768708) internal successors, (445), 322 states have internal predecessors, (445), 14 states have call successors, (14), 10 states have call predecessors, (14), 21 states have return successors, (60), 14 states have call predecessors, (60), 14 states have call successors, (60) [2022-07-21 17:57:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 519 transitions. [2022-07-21 17:57:36,974 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 519 transitions. Word has length 16 [2022-07-21 17:57:36,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:36,975 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 519 transitions. [2022-07-21 17:57:36,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 519 transitions. [2022-07-21 17:57:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 17:57:36,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:36,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:37,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:37,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:37,201 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:37,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:37,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2022-07-21 17:57:37,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:37,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376683146] [2022-07-21 17:57:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:37,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:37,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:37,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376683146] [2022-07-21 17:57:37,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376683146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:37,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:57:37,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:57:37,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526269363] [2022-07-21 17:57:37,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:37,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:57:37,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:37,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:57:37,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:57:37,242 INFO L87 Difference]: Start difference. First operand 347 states and 519 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:37,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:37,260 INFO L93 Difference]: Finished difference Result 356 states and 501 transitions. [2022-07-21 17:57:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:57:37,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 17:57:37,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:37,263 INFO L225 Difference]: With dead ends: 356 [2022-07-21 17:57:37,263 INFO L226 Difference]: Without dead ends: 356 [2022-07-21 17:57:37,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:57:37,264 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 26 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:37,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 114 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:57:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-07-21 17:57:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 343. [2022-07-21 17:57:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 296 states have (on average 1.5067567567567568) internal successors, (446), 323 states have internal predecessors, (446), 11 states have call successors, (11), 8 states have call predecessors, (11), 18 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2022-07-21 17:57:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 495 transitions. [2022-07-21 17:57:37,274 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 495 transitions. Word has length 18 [2022-07-21 17:57:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:37,274 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 495 transitions. [2022-07-21 17:57:37,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:57:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 495 transitions. [2022-07-21 17:57:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:57:37,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:37,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:37,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 17:57:37,276 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:37,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:37,276 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2022-07-21 17:57:37,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:37,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146370159] [2022-07-21 17:57:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:37,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:37,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:37,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:37,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146370159] [2022-07-21 17:57:37,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146370159] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:37,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:57:37,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:57:37,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018179113] [2022-07-21 17:57:37,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:37,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:57:37,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:37,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:57:37,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:57:37,318 INFO L87 Difference]: Start difference. First operand 343 states and 495 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:37,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:37,369 INFO L93 Difference]: Finished difference Result 263 states and 368 transitions. [2022-07-21 17:57:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:57:37,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-07-21 17:57:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:37,372 INFO L225 Difference]: With dead ends: 263 [2022-07-21 17:57:37,372 INFO L226 Difference]: Without dead ends: 263 [2022-07-21 17:57:37,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:57:37,373 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 48 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:37,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 87 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:57:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-21 17:57:37,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-07-21 17:57:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 224 states have (on average 1.4910714285714286) internal successors, (334), 248 states have internal predecessors, (334), 8 states have call successors, (8), 6 states have call predecessors, (8), 13 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-07-21 17:57:37,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 368 transitions. [2022-07-21 17:57:37,393 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 368 transitions. Word has length 25 [2022-07-21 17:57:37,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:37,395 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 368 transitions. [2022-07-21 17:57:37,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 368 transitions. [2022-07-21 17:57:37,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 17:57:37,399 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:37,399 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:37,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 17:57:37,399 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:37,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:37,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2022-07-21 17:57:37,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:37,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366087328] [2022-07-21 17:57:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:37,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:37,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:37,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:37,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366087328] [2022-07-21 17:57:37,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366087328] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:37,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99519719] [2022-07-21 17:57:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:37,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:37,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:37,555 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:37,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 17:57:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:37,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 17:57:37,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:37,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:57:37,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:57:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:37,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:38,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99519719] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:38,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:57:38,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2022-07-21 17:57:38,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860664556] [2022-07-21 17:57:38,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:38,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:57:38,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:57:38,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:57:38,007 INFO L87 Difference]: Start difference. First operand 263 states and 368 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:57:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:38,713 INFO L93 Difference]: Finished difference Result 414 states and 529 transitions. [2022-07-21 17:57:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 17:57:38,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-07-21 17:57:38,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:38,718 INFO L225 Difference]: With dead ends: 414 [2022-07-21 17:57:38,718 INFO L226 Difference]: Without dead ends: 414 [2022-07-21 17:57:38,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2022-07-21 17:57:38,719 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 606 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:38,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 322 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 323 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-07-21 17:57:38,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-07-21 17:57:38,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 321. [2022-07-21 17:57:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 279 states have (on average 1.4838709677419355) internal successors, (414), 304 states have internal predecessors, (414), 9 states have call successors, (9), 7 states have call predecessors, (9), 15 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-07-21 17:57:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 450 transitions. [2022-07-21 17:57:38,730 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 450 transitions. Word has length 27 [2022-07-21 17:57:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:38,731 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 450 transitions. [2022-07-21 17:57:38,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:57:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 450 transitions. [2022-07-21 17:57:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 17:57:38,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:38,732 INFO L195 NwaCegarLoop]: 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] [2022-07-21 17:57:38,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:38,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:38,947 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:38,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:38,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2022-07-21 17:57:38,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:38,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634276147] [2022-07-21 17:57:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:38,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:38,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:39,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:39,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634276147] [2022-07-21 17:57:39,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634276147] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:39,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350605085] [2022-07-21 17:57:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:39,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:39,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:39,026 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:39,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 17:57:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:39,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:57:39,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:39,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:57:39,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350605085] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:39,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:57:39,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2022-07-21 17:57:39,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598294385] [2022-07-21 17:57:39,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:39,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:57:39,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:39,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:57:39,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:57:39,193 INFO L87 Difference]: Start difference. First operand 321 states and 450 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:39,302 INFO L93 Difference]: Finished difference Result 416 states and 561 transitions. [2022-07-21 17:57:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:57:39,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-07-21 17:57:39,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:39,310 INFO L225 Difference]: With dead ends: 416 [2022-07-21 17:57:39,310 INFO L226 Difference]: Without dead ends: 416 [2022-07-21 17:57:39,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:57:39,311 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 122 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:39,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 195 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:57:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-07-21 17:57:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 344. [2022-07-21 17:57:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 302 states have (on average 1.4735099337748345) internal successors, (445), 327 states have internal predecessors, (445), 9 states have call successors, (9), 7 states have call predecessors, (9), 15 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-07-21 17:57:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 481 transitions. [2022-07-21 17:57:39,319 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 481 transitions. Word has length 28 [2022-07-21 17:57:39,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:39,320 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 481 transitions. [2022-07-21 17:57:39,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:39,320 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 481 transitions. [2022-07-21 17:57:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:57:39,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:39,321 INFO L195 NwaCegarLoop]: 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] [2022-07-21 17:57:39,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:39,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 17:57:39,544 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:39,544 INFO L85 PathProgramCache]: Analyzing trace with hash -221078483, now seen corresponding path program 1 times [2022-07-21 17:57:39,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:39,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522534166] [2022-07-21 17:57:39,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:39,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:39,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:39,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:39,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522534166] [2022-07-21 17:57:39,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522534166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:39,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335728864] [2022-07-21 17:57:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:39,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:39,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:39,868 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:39,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 17:57:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:39,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 17:57:39,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:40,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:57:40,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:57:40,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:57:40,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:57:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:40,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:40,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335728864] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:40,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:57:40,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-07-21 17:57:40,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335776385] [2022-07-21 17:57:40,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:40,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 17:57:40,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:40,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 17:57:40,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:57:40,440 INFO L87 Difference]: Start difference. First operand 344 states and 481 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:57:41,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:41,728 INFO L93 Difference]: Finished difference Result 554 states and 693 transitions. [2022-07-21 17:57:41,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 17:57:41,729 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-07-21 17:57:41,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:41,731 INFO L225 Difference]: With dead ends: 554 [2022-07-21 17:57:41,731 INFO L226 Difference]: Without dead ends: 554 [2022-07-21 17:57:41,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=462, Invalid=1794, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 17:57:41,733 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 691 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:41,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 505 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 604 Invalid, 0 Unknown, 140 Unchecked, 0.4s Time] [2022-07-21 17:57:41,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-07-21 17:57:41,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 401. [2022-07-21 17:57:41,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 356 states have (on average 1.4915730337078652) internal successors, (531), 382 states have internal predecessors, (531), 10 states have call successors, (10), 8 states have call predecessors, (10), 17 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-07-21 17:57:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 571 transitions. [2022-07-21 17:57:41,743 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 571 transitions. Word has length 29 [2022-07-21 17:57:41,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:41,743 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 571 transitions. [2022-07-21 17:57:41,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:57:41,743 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 571 transitions. [2022-07-21 17:57:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 17:57:41,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:41,744 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:41,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:41,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:41,968 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:41,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:41,968 INFO L85 PathProgramCache]: Analyzing trace with hash -253201523, now seen corresponding path program 1 times [2022-07-21 17:57:41,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:41,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505995135] [2022-07-21 17:57:41,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:41,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:42,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:57:42,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:42,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505995135] [2022-07-21 17:57:42,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505995135] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:42,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210059329] [2022-07-21 17:57:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:42,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:42,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:42,052 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:42,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 17:57:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:42,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 17:57:42,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:57:42,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:57:42,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210059329] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:42,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:57:42,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-07-21 17:57:42,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447318652] [2022-07-21 17:57:42,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:42,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:57:42,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:42,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:57:42,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:57:42,237 INFO L87 Difference]: Start difference. First operand 401 states and 571 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:57:42,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:42,469 INFO L93 Difference]: Finished difference Result 558 states and 726 transitions. [2022-07-21 17:57:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:57:42,470 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-21 17:57:42,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:42,471 INFO L225 Difference]: With dead ends: 558 [2022-07-21 17:57:42,472 INFO L226 Difference]: Without dead ends: 558 [2022-07-21 17:57:42,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:57:42,472 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 389 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:42,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 213 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:57:42,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-07-21 17:57:42,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 478. [2022-07-21 17:57:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 431 states have (on average 1.443155452436195) internal successors, (622), 457 states have internal predecessors, (622), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2022-07-21 17:57:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 659 transitions. [2022-07-21 17:57:42,482 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 659 transitions. Word has length 30 [2022-07-21 17:57:42,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:42,482 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 659 transitions. [2022-07-21 17:57:42,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:57:42,483 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 659 transitions. [2022-07-21 17:57:42,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:57:42,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:42,483 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:42,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:42,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:42,707 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:42,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:42,707 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2022-07-21 17:57:42,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:42,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136246913] [2022-07-21 17:57:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:42,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:42,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:57:42,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:42,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136246913] [2022-07-21 17:57:42,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136246913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:42,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377779373] [2022-07-21 17:57:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:42,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:42,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:42,785 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:42,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 17:57:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:42,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 17:57:42,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:57:42,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:57:43,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377779373] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:43,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:57:43,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2022-07-21 17:57:43,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197402652] [2022-07-21 17:57:43,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:43,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:57:43,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:43,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:57:43,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:57:43,047 INFO L87 Difference]: Start difference. First operand 478 states and 659 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:57:43,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:43,387 INFO L93 Difference]: Finished difference Result 533 states and 692 transitions. [2022-07-21 17:57:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:57:43,387 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-07-21 17:57:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:43,389 INFO L225 Difference]: With dead ends: 533 [2022-07-21 17:57:43,389 INFO L226 Difference]: Without dead ends: 533 [2022-07-21 17:57:43,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:57:43,390 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 498 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:43,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 332 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:57:43,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-07-21 17:57:43,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 484. [2022-07-21 17:57:43,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 437 states have (on average 1.425629290617849) internal successors, (623), 463 states have internal predecessors, (623), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-21 17:57:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 659 transitions. [2022-07-21 17:57:43,402 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 659 transitions. Word has length 31 [2022-07-21 17:57:43,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:43,402 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 659 transitions. [2022-07-21 17:57:43,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:57:43,402 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 659 transitions. [2022-07-21 17:57:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 17:57:43,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:43,403 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:43,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:43,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 17:57:43,627 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:43,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:43,627 INFO L85 PathProgramCache]: Analyzing trace with hash -117381739, now seen corresponding path program 1 times [2022-07-21 17:57:43,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:43,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122882266] [2022-07-21 17:57:43,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:43,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:43,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:43,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:43,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122882266] [2022-07-21 17:57:43,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122882266] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:43,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107066765] [2022-07-21 17:57:43,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:43,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:43,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:43,794 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:43,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 17:57:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:43,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 17:57:43,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:44,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:57:44,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:57:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:44,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:44,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107066765] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:44,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:57:44,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2022-07-21 17:57:44,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100855094] [2022-07-21 17:57:44,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:44,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:57:44,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:44,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:57:44,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:57:44,339 INFO L87 Difference]: Start difference. First operand 484 states and 659 transitions. Second operand has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:57:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:45,159 INFO L93 Difference]: Finished difference Result 555 states and 698 transitions. [2022-07-21 17:57:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:57:45,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-07-21 17:57:45,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:45,161 INFO L225 Difference]: With dead ends: 555 [2022-07-21 17:57:45,161 INFO L226 Difference]: Without dead ends: 555 [2022-07-21 17:57:45,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 17:57:45,162 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 451 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:45,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 427 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 542 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-07-21 17:57:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-07-21 17:57:45,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 484. [2022-07-21 17:57:45,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 437 states have (on average 1.3958810068649885) internal successors, (610), 463 states have internal predecessors, (610), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-21 17:57:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 646 transitions. [2022-07-21 17:57:45,174 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 646 transitions. Word has length 35 [2022-07-21 17:57:45,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:45,175 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 646 transitions. [2022-07-21 17:57:45,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:57:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 646 transitions. [2022-07-21 17:57:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 17:57:45,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:45,176 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 17:57:45,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:45,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 17:57:45,384 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:45,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:45,384 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2022-07-21 17:57:45,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:45,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316577803] [2022-07-21 17:57:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:45,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:45,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:45,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:45,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316577803] [2022-07-21 17:57:45,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316577803] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:45,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196459159] [2022-07-21 17:57:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:45,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:45,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:45,484 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:45,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 17:57:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:45,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:57:45,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:45,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:45,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196459159] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:45,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:57:45,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-07-21 17:57:45,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388541316] [2022-07-21 17:57:45,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:45,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:57:45,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:45,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:57:45,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:57:45,644 INFO L87 Difference]: Start difference. First operand 484 states and 646 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-07-21 17:57:45,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:45,723 INFO L93 Difference]: Finished difference Result 513 states and 669 transitions. [2022-07-21 17:57:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:57:45,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 40 [2022-07-21 17:57:45,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:45,725 INFO L225 Difference]: With dead ends: 513 [2022-07-21 17:57:45,725 INFO L226 Difference]: Without dead ends: 513 [2022-07-21 17:57:45,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:57:45,726 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 84 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:45,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 70 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:57:45,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-07-21 17:57:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 482. [2022-07-21 17:57:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 437 states have (on average 1.3775743707093822) internal successors, (602), 461 states have internal predecessors, (602), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-21 17:57:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 638 transitions. [2022-07-21 17:57:45,740 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 638 transitions. Word has length 40 [2022-07-21 17:57:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:45,740 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 638 transitions. [2022-07-21 17:57:45,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-07-21 17:57:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 638 transitions. [2022-07-21 17:57:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 17:57:45,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:45,741 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 17:57:45,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:45,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 17:57:45,968 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:45,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:45,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2022-07-21 17:57:45,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:45,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702269838] [2022-07-21 17:57:45,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:45,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:46,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:46,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:46,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702269838] [2022-07-21 17:57:46,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702269838] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:46,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652971923] [2022-07-21 17:57:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:46,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:46,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:46,026 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:46,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 17:57:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:46,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:57:46,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:46,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:46,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652971923] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:46,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:57:46,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-07-21 17:57:46,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213117515] [2022-07-21 17:57:46,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:46,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:57:46,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:46,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:57:46,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:57:46,196 INFO L87 Difference]: Start difference. First operand 482 states and 638 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2022-07-21 17:57:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:46,285 INFO L93 Difference]: Finished difference Result 511 states and 661 transitions. [2022-07-21 17:57:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:57:46,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 41 [2022-07-21 17:57:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:46,287 INFO L225 Difference]: With dead ends: 511 [2022-07-21 17:57:46,287 INFO L226 Difference]: Without dead ends: 511 [2022-07-21 17:57:46,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:57:46,288 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 80 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:46,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 50 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:57:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-07-21 17:57:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 480. [2022-07-21 17:57:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 437 states have (on average 1.3592677345537758) internal successors, (594), 459 states have internal predecessors, (594), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-21 17:57:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 630 transitions. [2022-07-21 17:57:46,299 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 630 transitions. Word has length 41 [2022-07-21 17:57:46,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:46,299 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 630 transitions. [2022-07-21 17:57:46,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2022-07-21 17:57:46,299 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 630 transitions. [2022-07-21 17:57:46,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 17:57:46,300 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:46,300 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 17:57:46,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:46,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:46,511 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:46,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:46,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2022-07-21 17:57:46,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:46,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799822514] [2022-07-21 17:57:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:46,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:46,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:46,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:46,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799822514] [2022-07-21 17:57:46,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799822514] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:46,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86117717] [2022-07-21 17:57:46,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:46,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:46,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:46,580 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:46,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 17:57:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:46,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 17:57:46,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:46,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:57:46,684 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:57:46,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-21 17:57:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:46,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:46,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86117717] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:46,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:57:46,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2022-07-21 17:57:46,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921866508] [2022-07-21 17:57:46,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:46,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:57:46,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:46,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:57:46,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:57:46,843 INFO L87 Difference]: Start difference. First operand 480 states and 630 transitions. Second operand has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:57:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:46,960 INFO L93 Difference]: Finished difference Result 532 states and 675 transitions. [2022-07-21 17:57:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:57:46,961 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-07-21 17:57:46,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:46,963 INFO L225 Difference]: With dead ends: 532 [2022-07-21 17:57:46,963 INFO L226 Difference]: Without dead ends: 532 [2022-07-21 17:57:46,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:57:46,964 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 83 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:46,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 176 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 170 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2022-07-21 17:57:46,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-07-21 17:57:46,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 486. [2022-07-21 17:57:46,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 443 states have (on average 1.3544018058690745) internal successors, (600), 465 states have internal predecessors, (600), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-21 17:57:46,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 636 transitions. [2022-07-21 17:57:46,975 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 636 transitions. Word has length 42 [2022-07-21 17:57:46,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:46,975 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 636 transitions. [2022-07-21 17:57:46,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:57:46,975 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 636 transitions. [2022-07-21 17:57:46,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 17:57:46,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:46,976 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:47,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:47,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:47,200 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:47,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1200736699, now seen corresponding path program 1 times [2022-07-21 17:57:47,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:47,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386815851] [2022-07-21 17:57:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:47,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:47,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:47,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:47,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386815851] [2022-07-21 17:57:47,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386815851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:47,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196543225] [2022-07-21 17:57:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:47,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:47,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:47,267 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:47,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 17:57:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:47,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:57:47,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:57:47,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:57:47,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196543225] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:47,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:57:47,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-21 17:57:47,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72628106] [2022-07-21 17:57:47,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:47,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:57:47,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:47,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:57:47,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:57:47,360 INFO L87 Difference]: Start difference. First operand 486 states and 636 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:47,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:47,384 INFO L93 Difference]: Finished difference Result 580 states and 722 transitions. [2022-07-21 17:57:47,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:57:47,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-07-21 17:57:47,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:47,386 INFO L225 Difference]: With dead ends: 580 [2022-07-21 17:57:47,386 INFO L226 Difference]: Without dead ends: 580 [2022-07-21 17:57:47,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:57:47,387 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 68 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:47,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 156 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:57:47,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-07-21 17:57:47,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 476. [2022-07-21 17:57:47,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 433 states have (on average 1.327944572748268) internal successors, (575), 455 states have internal predecessors, (575), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-21 17:57:47,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 611 transitions. [2022-07-21 17:57:47,398 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 611 transitions. Word has length 45 [2022-07-21 17:57:47,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:47,398 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 611 transitions. [2022-07-21 17:57:47,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:47,398 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 611 transitions. [2022-07-21 17:57:47,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 17:57:47,399 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:47,399 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:47,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:47,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-21 17:57:47,619 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:47,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:47,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1458472979, now seen corresponding path program 1 times [2022-07-21 17:57:47,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:47,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482921807] [2022-07-21 17:57:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:47,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:47,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:47,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 17:57:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 17:57:47,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:47,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482921807] [2022-07-21 17:57:47,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482921807] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:47,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122880686] [2022-07-21 17:57:47,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:47,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:47,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:47,768 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:47,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 17:57:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:47,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 17:57:47,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:48,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:57:48,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:57:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 17:57:48,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:48,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122880686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:48,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:57:48,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2022-07-21 17:57:48,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908420147] [2022-07-21 17:57:48,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:48,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:57:48,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:48,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:57:48,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:57:48,291 INFO L87 Difference]: Start difference. First operand 476 states and 611 transitions. Second operand has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:57:48,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:48,800 INFO L93 Difference]: Finished difference Result 573 states and 691 transitions. [2022-07-21 17:57:48,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 17:57:48,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-07-21 17:57:48,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:48,804 INFO L225 Difference]: With dead ends: 573 [2022-07-21 17:57:48,804 INFO L226 Difference]: Without dead ends: 573 [2022-07-21 17:57:48,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2022-07-21 17:57:48,805 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 454 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:48,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 422 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 352 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-07-21 17:57:48,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-07-21 17:57:48,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 480. [2022-07-21 17:57:48,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 438 states have (on average 1.321917808219178) internal successors, (579), 459 states have internal predecessors, (579), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-07-21 17:57:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 613 transitions. [2022-07-21 17:57:48,816 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 613 transitions. Word has length 48 [2022-07-21 17:57:48,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:48,816 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 613 transitions. [2022-07-21 17:57:48,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:57:48,817 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 613 transitions. [2022-07-21 17:57:48,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 17:57:48,817 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:48,817 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:48,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:49,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:49,043 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:49,044 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2022-07-21 17:57:49,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:49,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622643200] [2022-07-21 17:57:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:49,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:49,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 17:57:49,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:49,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622643200] [2022-07-21 17:57:49,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622643200] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:49,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999268259] [2022-07-21 17:57:49,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:49,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:49,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:49,088 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:49,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 17:57:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:49,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:57:49,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 17:57:49,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:57:49,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999268259] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:49,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:57:49,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-07-21 17:57:49,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708561309] [2022-07-21 17:57:49,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:49,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:57:49,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:49,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:57:49,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:57:49,167 INFO L87 Difference]: Start difference. First operand 480 states and 613 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:49,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:49,173 INFO L93 Difference]: Finished difference Result 506 states and 634 transitions. [2022-07-21 17:57:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:57:49,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-07-21 17:57:49,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:49,175 INFO L225 Difference]: With dead ends: 506 [2022-07-21 17:57:49,175 INFO L226 Difference]: Without dead ends: 506 [2022-07-21 17:57:49,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:57:49,176 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 13 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:49,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 110 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:57:49,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-07-21 17:57:49,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 479. [2022-07-21 17:57:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 438 states have (on average 1.3082191780821917) internal successors, (573), 458 states have internal predecessors, (573), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-07-21 17:57:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 607 transitions. [2022-07-21 17:57:49,186 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 607 transitions. Word has length 47 [2022-07-21 17:57:49,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:49,187 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 607 transitions. [2022-07-21 17:57:49,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 607 transitions. [2022-07-21 17:57:49,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 17:57:49,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:49,188 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:49,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:49,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:49,408 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:49,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:49,408 INFO L85 PathProgramCache]: Analyzing trace with hash 296907458, now seen corresponding path program 1 times [2022-07-21 17:57:49,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:49,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202415530] [2022-07-21 17:57:49,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:49,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:49,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:49,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 17:57:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:57:49,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:49,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202415530] [2022-07-21 17:57:49,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202415530] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:49,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293925749] [2022-07-21 17:57:49,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:49,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:49,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:49,540 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:49,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 17:57:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:49,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:57:49,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:49,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:49,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293925749] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:49,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:57:49,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2022-07-21 17:57:49,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032136141] [2022-07-21 17:57:49,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:49,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:57:49,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:49,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:57:49,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:57:49,755 INFO L87 Difference]: Start difference. First operand 479 states and 607 transitions. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:57:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:49,987 INFO L93 Difference]: Finished difference Result 399 states and 478 transitions. [2022-07-21 17:57:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:57:49,987 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-07-21 17:57:49,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:49,989 INFO L225 Difference]: With dead ends: 399 [2022-07-21 17:57:49,989 INFO L226 Difference]: Without dead ends: 399 [2022-07-21 17:57:49,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-07-21 17:57:49,990 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 239 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:49,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 128 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:57:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-07-21 17:57:49,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 368. [2022-07-21 17:57:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 334 states have (on average 1.2754491017964071) internal successors, (426), 351 states have internal predecessors, (426), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-21 17:57:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 450 transitions. [2022-07-21 17:57:49,999 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 450 transitions. Word has length 48 [2022-07-21 17:57:49,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:49,999 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 450 transitions. [2022-07-21 17:57:49,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:57:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 450 transitions. [2022-07-21 17:57:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 17:57:50,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:50,000 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:50,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-21 17:57:50,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-21 17:57:50,201 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:50,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1661228621, now seen corresponding path program 1 times [2022-07-21 17:57:50,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:50,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840035112] [2022-07-21 17:57:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:50,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:50,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 17:57:50,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:50,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840035112] [2022-07-21 17:57:50,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840035112] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:50,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925617906] [2022-07-21 17:57:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:50,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:50,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:50,242 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:50,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 17:57:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:50,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:57:50,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 17:57:50,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:57:50,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925617906] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:50,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:57:50,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2022-07-21 17:57:50,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205306846] [2022-07-21 17:57:50,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:50,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:57:50,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:50,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:57:50,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:57:50,384 INFO L87 Difference]: Start difference. First operand 368 states and 450 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:50,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:50,405 INFO L93 Difference]: Finished difference Result 384 states and 462 transitions. [2022-07-21 17:57:50,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:57:50,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-07-21 17:57:50,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:50,407 INFO L225 Difference]: With dead ends: 384 [2022-07-21 17:57:50,407 INFO L226 Difference]: Without dead ends: 384 [2022-07-21 17:57:50,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:57:50,409 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 43 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:50,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 92 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:57:50,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-07-21 17:57:50,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 367. [2022-07-21 17:57:50,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 334 states have (on average 1.2604790419161678) internal successors, (421), 350 states have internal predecessors, (421), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-21 17:57:50,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 445 transitions. [2022-07-21 17:57:50,420 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 445 transitions. Word has length 48 [2022-07-21 17:57:50,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:50,420 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 445 transitions. [2022-07-21 17:57:50,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:50,425 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 445 transitions. [2022-07-21 17:57:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 17:57:50,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:50,425 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:50,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:50,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:50,649 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:50,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1433195828, now seen corresponding path program 1 times [2022-07-21 17:57:50,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:50,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304339385] [2022-07-21 17:57:50,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:50,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:50,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:50,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 17:57:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 17:57:51,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:51,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304339385] [2022-07-21 17:57:51,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304339385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:51,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911545863] [2022-07-21 17:57:51,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:51,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:51,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:51,012 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:51,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 17:57:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:51,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 17:57:51,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:51,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:57:51,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:57:51,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:57:51,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:57:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 17:57:51,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:51,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911545863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:51,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:57:51,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-07-21 17:57:51,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265870159] [2022-07-21 17:57:51,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:51,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 17:57:51,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:51,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 17:57:51,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:57:51,718 INFO L87 Difference]: Start difference. First operand 367 states and 445 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 15 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:57:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:52,637 INFO L93 Difference]: Finished difference Result 418 states and 477 transitions. [2022-07-21 17:57:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 17:57:52,637 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 15 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-07-21 17:57:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:52,639 INFO L225 Difference]: With dead ends: 418 [2022-07-21 17:57:52,639 INFO L226 Difference]: Without dead ends: 418 [2022-07-21 17:57:52,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 17:57:52,640 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 401 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:52,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 395 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 483 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-07-21 17:57:52,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-07-21 17:57:52,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 366. [2022-07-21 17:57:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 334 states have (on average 1.2574850299401197) internal successors, (420), 349 states have internal predecessors, (420), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-21 17:57:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 442 transitions. [2022-07-21 17:57:52,653 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 442 transitions. Word has length 50 [2022-07-21 17:57:52,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:52,653 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 442 transitions. [2022-07-21 17:57:52,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 15 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:57:52,654 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 442 transitions. [2022-07-21 17:57:52,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 17:57:52,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:52,654 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:52,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:52,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:52,875 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:52,876 INFO L85 PathProgramCache]: Analyzing trace with hash -41520225, now seen corresponding path program 1 times [2022-07-21 17:57:52,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:52,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379966351] [2022-07-21 17:57:52,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:52,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:52,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 17:57:52,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:52,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379966351] [2022-07-21 17:57:52,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379966351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:52,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121449359] [2022-07-21 17:57:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:52,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:52,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:52,922 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:52,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 17:57:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:52,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:57:52,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 17:57:53,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:57:53,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121449359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:53,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:57:53,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-07-21 17:57:53,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482419061] [2022-07-21 17:57:53,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:53,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:57:53,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:53,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:57:53,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:57:53,008 INFO L87 Difference]: Start difference. First operand 366 states and 442 transitions. Second operand has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:53,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:53,014 INFO L93 Difference]: Finished difference Result 384 states and 456 transitions. [2022-07-21 17:57:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:57:53,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-07-21 17:57:53,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:53,016 INFO L225 Difference]: With dead ends: 384 [2022-07-21 17:57:53,016 INFO L226 Difference]: Without dead ends: 384 [2022-07-21 17:57:53,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:57:53,017 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:53,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 107 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:57:53,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-07-21 17:57:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 365. [2022-07-21 17:57:53,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.2425149700598803) internal successors, (415), 348 states have internal predecessors, (415), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-21 17:57:53,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 437 transitions. [2022-07-21 17:57:53,024 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 437 transitions. Word has length 49 [2022-07-21 17:57:53,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:53,025 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 437 transitions. [2022-07-21 17:57:53,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 437 transitions. [2022-07-21 17:57:53,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:57:53,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:53,026 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:53,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:53,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:53,247 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:53,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:53,247 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2022-07-21 17:57:53,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:53,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986792013] [2022-07-21 17:57:53,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:53,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:53,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:53,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 17:57:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 17:57:53,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:53,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986792013] [2022-07-21 17:57:53,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986792013] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:53,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902210405] [2022-07-21 17:57:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:53,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:53,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:53,319 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:53,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 17:57:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:53,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:57:53,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 17:57:53,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 17:57:53,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902210405] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:53,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:57:53,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-07-21 17:57:53,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122801460] [2022-07-21 17:57:53,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:53,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:57:53,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:53,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:57:53,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:57:53,621 INFO L87 Difference]: Start difference. First operand 365 states and 437 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 17:57:53,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:53,849 INFO L93 Difference]: Finished difference Result 402 states and 463 transitions. [2022-07-21 17:57:53,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:57:53,850 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-07-21 17:57:53,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:53,851 INFO L225 Difference]: With dead ends: 402 [2022-07-21 17:57:53,851 INFO L226 Difference]: Without dead ends: 402 [2022-07-21 17:57:53,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:57:53,852 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 265 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:53,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 193 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:57:53,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-21 17:57:53,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 365. [2022-07-21 17:57:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.2335329341317365) internal successors, (412), 348 states have internal predecessors, (412), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-21 17:57:53,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 434 transitions. [2022-07-21 17:57:53,859 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 434 transitions. Word has length 51 [2022-07-21 17:57:53,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:53,859 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 434 transitions. [2022-07-21 17:57:53,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 17:57:53,860 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 434 transitions. [2022-07-21 17:57:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:57:53,860 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:53,861 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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] [2022-07-21 17:57:53,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:54,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-21 17:57:54,084 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:54,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:54,084 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2022-07-21 17:57:54,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:54,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41811253] [2022-07-21 17:57:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:54,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:54,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:54,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 17:57:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:57:54,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:54,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41811253] [2022-07-21 17:57:54,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41811253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:54,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538728300] [2022-07-21 17:57:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:54,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:54,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:54,217 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:54,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 17:57:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:54,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 17:57:54,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:54,389 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:57:54,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 17:57:54,478 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:57:54,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-21 17:57:54,512 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:57:54,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-21 17:57:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:54,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:54,610 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:57:54,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2022-07-21 17:57:54,749 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:57:54,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 105 [2022-07-21 17:57:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:54,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538728300] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:54,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:57:54,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 10] total 26 [2022-07-21 17:57:54,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448358515] [2022-07-21 17:57:54,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:54,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 17:57:54,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:54,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 17:57:54,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-07-21 17:57:54,921 INFO L87 Difference]: Start difference. First operand 365 states and 434 transitions. Second operand has 27 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 17:57:55,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:55,160 INFO L93 Difference]: Finished difference Result 393 states and 460 transitions. [2022-07-21 17:57:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:57:55,161 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 51 [2022-07-21 17:57:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:55,163 INFO L225 Difference]: With dead ends: 393 [2022-07-21 17:57:55,163 INFO L226 Difference]: Without dead ends: 393 [2022-07-21 17:57:55,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 17:57:55,164 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 416 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:55,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 96 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 184 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-07-21 17:57:55,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-21 17:57:55,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 365. [2022-07-21 17:57:55,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.2305389221556886) internal successors, (411), 348 states have internal predecessors, (411), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-21 17:57:55,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 433 transitions. [2022-07-21 17:57:55,171 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 433 transitions. Word has length 51 [2022-07-21 17:57:55,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:55,171 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 433 transitions. [2022-07-21 17:57:55,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 17:57:55,171 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 433 transitions. [2022-07-21 17:57:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:57:55,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:55,172 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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] [2022-07-21 17:57:55,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:55,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-21 17:57:55,387 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:55,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:55,388 INFO L85 PathProgramCache]: Analyzing trace with hash -563187968, now seen corresponding path program 1 times [2022-07-21 17:57:55,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:55,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726823080] [2022-07-21 17:57:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:55,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:55,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:55,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 17:57:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:57:55,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:55,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726823080] [2022-07-21 17:57:55,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726823080] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:55,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687524061] [2022-07-21 17:57:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:55,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:55,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:55,516 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:55,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 17:57:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:55,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:57:55,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:55,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:57:55,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-21 17:57:55,747 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:57:55,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 17:57:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:57:55,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:57:55,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687524061] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:55,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:57:55,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2022-07-21 17:57:55,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209665968] [2022-07-21 17:57:55,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:55,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:57:55,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:55,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:57:55,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:57:55,821 INFO L87 Difference]: Start difference. First operand 365 states and 433 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:57:55,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:55,948 INFO L93 Difference]: Finished difference Result 443 states and 508 transitions. [2022-07-21 17:57:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:57:55,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-07-21 17:57:55,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:55,950 INFO L225 Difference]: With dead ends: 443 [2022-07-21 17:57:55,950 INFO L226 Difference]: Without dead ends: 443 [2022-07-21 17:57:55,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:57:55,952 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 233 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:55,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 80 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:57:55,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-07-21 17:57:55,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 365. [2022-07-21 17:57:55,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.221556886227545) internal successors, (408), 348 states have internal predecessors, (408), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-21 17:57:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 430 transitions. [2022-07-21 17:57:55,960 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 430 transitions. Word has length 51 [2022-07-21 17:57:55,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:55,960 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 430 transitions. [2022-07-21 17:57:55,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:57:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 430 transitions. [2022-07-21 17:57:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:57:55,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:55,961 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:55,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:56,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:56,187 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:56,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:56,187 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2022-07-21 17:57:56,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:56,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740180050] [2022-07-21 17:57:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:56,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:56,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:56,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 17:57:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 17:57:56,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:56,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740180050] [2022-07-21 17:57:56,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740180050] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:56,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712778802] [2022-07-21 17:57:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:56,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:56,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:56,264 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:56,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 17:57:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:56,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 17:57:56,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 17:57:56,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 17:57:56,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712778802] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:56,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:57:56,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2022-07-21 17:57:56,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666327247] [2022-07-21 17:57:56,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:56,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:57:56,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:56,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:57:56,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:57:56,631 INFO L87 Difference]: Start difference. First operand 365 states and 430 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 17:57:56,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:56,945 INFO L93 Difference]: Finished difference Result 396 states and 455 transitions. [2022-07-21 17:57:56,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:57:56,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2022-07-21 17:57:56,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:56,947 INFO L225 Difference]: With dead ends: 396 [2022-07-21 17:57:56,947 INFO L226 Difference]: Without dead ends: 396 [2022-07-21 17:57:56,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:57:56,948 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 343 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:56,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 270 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:57:56,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-07-21 17:57:56,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 364. [2022-07-21 17:57:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 334 states have (on average 1.2065868263473054) internal successors, (403), 347 states have internal predecessors, (403), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-21 17:57:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 425 transitions. [2022-07-21 17:57:56,954 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 425 transitions. Word has length 52 [2022-07-21 17:57:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:56,955 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 425 transitions. [2022-07-21 17:57:56,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 17:57:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 425 transitions. [2022-07-21 17:57:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:57:56,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:56,956 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 17:57:56,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:57,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:57,171 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:57,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:57,172 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2022-07-21 17:57:57,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:57,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489995827] [2022-07-21 17:57:57,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:57,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:57,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:57,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 17:57:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:57:57,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:57,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489995827] [2022-07-21 17:57:57,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489995827] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:57,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559487602] [2022-07-21 17:57:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:57,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:57,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:57,629 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:57,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 17:57:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:57,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 17:57:57,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:57,864 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:57:57,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 17:57:58,047 INFO L356 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-07-21 17:57:58,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-07-21 17:57:58,081 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-21 17:57:58,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-07-21 17:57:58,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:57:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:58,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:58,296 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-21 17:57:58,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 165 [2022-07-21 17:57:58,552 INFO L356 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2022-07-21 17:57:58,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 101 [2022-07-21 17:57:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:58,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559487602] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:58,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:57:58,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 14] total 44 [2022-07-21 17:57:58,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399883342] [2022-07-21 17:57:58,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:58,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 17:57:58,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:58,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 17:57:58,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 17:57:58,845 INFO L87 Difference]: Start difference. First operand 364 states and 425 transitions. Second operand has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:57:59,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:59,602 INFO L93 Difference]: Finished difference Result 451 states and 511 transitions. [2022-07-21 17:57:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:57:59,603 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2022-07-21 17:57:59,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:59,604 INFO L225 Difference]: With dead ends: 451 [2022-07-21 17:57:59,605 INFO L226 Difference]: Without dead ends: 451 [2022-07-21 17:57:59,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=579, Invalid=2843, Unknown=0, NotChecked=0, Total=3422 [2022-07-21 17:57:59,606 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 660 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:59,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 253 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 726 Invalid, 0 Unknown, 35 Unchecked, 0.4s Time] [2022-07-21 17:57:59,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-07-21 17:57:59,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 364. [2022-07-21 17:57:59,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 334 states have (on average 1.2035928143712575) internal successors, (402), 347 states have internal predecessors, (402), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-21 17:57:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 424 transitions. [2022-07-21 17:57:59,613 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 424 transitions. Word has length 52 [2022-07-21 17:57:59,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:59,613 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 424 transitions. [2022-07-21 17:57:59,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:57:59,614 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 424 transitions. [2022-07-21 17:57:59,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:57:59,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:59,614 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:59,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-21 17:57:59,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:59,827 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:57:59,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:59,828 INFO L85 PathProgramCache]: Analyzing trace with hash 21635793, now seen corresponding path program 1 times [2022-07-21 17:57:59,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:57:59,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724998667] [2022-07-21 17:57:59,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:59,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:57:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:59,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:57:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 17:57:59,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:57:59,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724998667] [2022-07-21 17:57:59,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724998667] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:57:59,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408392542] [2022-07-21 17:57:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:59,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:57:59,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:57:59,866 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:57:59,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 17:57:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:59,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:57:59,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 17:57:59,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:57:59,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408392542] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:59,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:57:59,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-21 17:57:59,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341706351] [2022-07-21 17:57:59,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:59,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:57:59,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:57:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:57:59,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:57:59,954 INFO L87 Difference]: Start difference. First operand 364 states and 424 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:59,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:59,957 INFO L93 Difference]: Finished difference Result 306 states and 346 transitions. [2022-07-21 17:57:59,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:57:59,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-07-21 17:57:59,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:59,959 INFO L225 Difference]: With dead ends: 306 [2022-07-21 17:57:59,959 INFO L226 Difference]: Without dead ends: 306 [2022-07-21 17:57:59,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:57:59,960 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 4 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:59,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 98 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:57:59,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-21 17:57:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 289. [2022-07-21 17:57:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.178030303030303) internal successors, (311), 274 states have internal predecessors, (311), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-21 17:57:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 329 transitions. [2022-07-21 17:57:59,969 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 329 transitions. Word has length 52 [2022-07-21 17:57:59,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:59,969 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 329 transitions. [2022-07-21 17:57:59,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:59,969 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 329 transitions. [2022-07-21 17:57:59,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 17:57:59,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:59,970 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 17:57:59,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:00,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-21 17:58:00,179 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:00,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:00,180 INFO L85 PathProgramCache]: Analyzing trace with hash -57759457, now seen corresponding path program 1 times [2022-07-21 17:58:00,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:58:00,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80631034] [2022-07-21 17:58:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:00,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:58:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:00,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:58:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:00,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 17:58:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:58:00,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:58:00,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80631034] [2022-07-21 17:58:00,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80631034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:58:00,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371151850] [2022-07-21 17:58:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:00,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:58:00,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:58:00,704 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:58:00,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 17:58:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:00,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:58:00,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:00,996 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-21 17:58:00,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-21 17:58:01,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 17:58:01,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-21 17:58:01,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:58:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:58:01,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:58:01,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:58:01,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-07-21 17:58:01,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-07-21 17:58:01,445 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:58:01,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2022-07-21 17:58:01,524 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:58:01,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-07-21 17:58:01,565 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-07-21 17:58:01,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2022-07-21 17:58:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:58:01,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371151850] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:58:01,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:58:01,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 10] total 35 [2022-07-21 17:58:01,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374976899] [2022-07-21 17:58:01,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:58:01,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 17:58:01,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:58:01,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 17:58:01,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 17:58:01,617 INFO L87 Difference]: Start difference. First operand 289 states and 329 transitions. Second operand has 36 states, 34 states have (on average 4.235294117647059) internal successors, (144), 32 states have internal predecessors, (144), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:58:02,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:02,456 INFO L93 Difference]: Finished difference Result 353 states and 392 transitions. [2022-07-21 17:58:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:58:02,457 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 4.235294117647059) internal successors, (144), 32 states have internal predecessors, (144), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2022-07-21 17:58:02,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:02,458 INFO L225 Difference]: With dead ends: 353 [2022-07-21 17:58:02,458 INFO L226 Difference]: Without dead ends: 353 [2022-07-21 17:58:02,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=463, Invalid=1987, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 17:58:02,459 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 458 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:02,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 155 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 431 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-07-21 17:58:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-07-21 17:58:02,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 289. [2022-07-21 17:58:02,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.1742424242424243) internal successors, (310), 274 states have internal predecessors, (310), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-21 17:58:02,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 328 transitions. [2022-07-21 17:58:02,465 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 328 transitions. Word has length 53 [2022-07-21 17:58:02,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:02,465 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 328 transitions. [2022-07-21 17:58:02,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 4.235294117647059) internal successors, (144), 32 states have internal predecessors, (144), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:58:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 328 transitions. [2022-07-21 17:58:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 17:58:02,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:02,466 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:02,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:02,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-21 17:58:02,690 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2022-07-21 17:58:02,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:58:02,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464783926] [2022-07-21 17:58:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:02,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:58:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:02,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:58:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:02,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 17:58:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:58:02,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:58:02,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464783926] [2022-07-21 17:58:02,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464783926] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:58:02,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295772954] [2022-07-21 17:58:02,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:02,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:58:02,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:58:02,903 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:58:02,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 17:58:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:02,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 17:58:02,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:03,071 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:58:03,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-21 17:58:03,195 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-07-21 17:58:03,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-07-21 17:58:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:03,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:58:03,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295772954] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:58:03,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:58:03,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2022-07-21 17:58:03,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033827212] [2022-07-21 17:58:03,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:58:03,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:58:03,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:58:03,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:58:03,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-07-21 17:58:03,482 INFO L87 Difference]: Start difference. First operand 289 states and 328 transitions. Second operand has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:58:04,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:04,014 INFO L93 Difference]: Finished difference Result 307 states and 344 transitions. [2022-07-21 17:58:04,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 17:58:04,015 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-07-21 17:58:04,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:04,016 INFO L225 Difference]: With dead ends: 307 [2022-07-21 17:58:04,016 INFO L226 Difference]: Without dead ends: 307 [2022-07-21 17:58:04,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 17:58:04,017 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 336 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:04,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 264 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 295 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-07-21 17:58:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-07-21 17:58:04,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 288. [2022-07-21 17:58:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 264 states have (on average 1.1704545454545454) internal successors, (309), 273 states have internal predecessors, (309), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-21 17:58:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 327 transitions. [2022-07-21 17:58:04,022 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 327 transitions. Word has length 54 [2022-07-21 17:58:04,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:04,022 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 327 transitions. [2022-07-21 17:58:04,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:58:04,023 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 327 transitions. [2022-07-21 17:58:04,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 17:58:04,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:04,024 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:04,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:04,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-21 17:58:04,237 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:04,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:04,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1889386740, now seen corresponding path program 2 times [2022-07-21 17:58:04,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:58:04,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332420148] [2022-07-21 17:58:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:04,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:58:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:04,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:58:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:04,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 17:58:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 17:58:04,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:58:04,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332420148] [2022-07-21 17:58:04,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332420148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:58:04,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860426128] [2022-07-21 17:58:04,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:58:04,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:58:04,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:58:04,406 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:58:04,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 17:58:04,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:58:04,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:58:04,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 17:58:04,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:04,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:04,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:58:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 17:58:04,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:58:05,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860426128] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:58:05,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:58:05,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2022-07-21 17:58:05,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676527705] [2022-07-21 17:58:05,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:58:05,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:58:05,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:58:05,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:58:05,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:58:05,082 INFO L87 Difference]: Start difference. First operand 288 states and 327 transitions. Second operand has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 14 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:58:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:05,635 INFO L93 Difference]: Finished difference Result 312 states and 347 transitions. [2022-07-21 17:58:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 17:58:05,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 14 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2022-07-21 17:58:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:05,637 INFO L225 Difference]: With dead ends: 312 [2022-07-21 17:58:05,637 INFO L226 Difference]: Without dead ends: 312 [2022-07-21 17:58:05,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 17:58:05,637 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 339 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:05,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 261 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 359 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-07-21 17:58:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-07-21 17:58:05,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 288. [2022-07-21 17:58:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 264 states have (on average 1.1590909090909092) internal successors, (306), 273 states have internal predecessors, (306), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-21 17:58:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 324 transitions. [2022-07-21 17:58:05,643 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 324 transitions. Word has length 56 [2022-07-21 17:58:05,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:05,643 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 324 transitions. [2022-07-21 17:58:05,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 14 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:58:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 324 transitions. [2022-07-21 17:58:05,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 17:58:05,645 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:05,645 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:05,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:05,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:58:05,868 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:05,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:05,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1842875129, now seen corresponding path program 1 times [2022-07-21 17:58:05,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:58:05,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455051838] [2022-07-21 17:58:05,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:05,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:58:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:06,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 17:58:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:06,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 17:58:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:06,108 ERROR L253 erpolLogProxyWrapper]: Interpolant 12 not inductive [2022-07-21 17:58:06,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-21 17:58:06,112 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:233) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:879) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:803) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:352) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:192) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:284) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:327) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:379) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-21 17:58:06,118 INFO L158 Benchmark]: Toolchain (without parser) took 35076.45ms. Allocated memory was 50.3MB in the beginning and 161.5MB in the end (delta: 111.1MB). Free memory was 26.3MB in the beginning and 88.7MB in the end (delta: -62.4MB). Peak memory consumption was 48.7MB. Max. memory is 16.1GB. [2022-07-21 17:58:06,118 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 50.3MB. Free memory was 31.7MB in the beginning and 31.6MB in the end (delta: 37.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:58:06,121 INFO L158 Benchmark]: CACSL2BoogieTranslator took 517.27ms. Allocated memory was 50.3MB in the beginning and 62.9MB in the end (delta: 12.6MB). Free memory was 26.2MB in the beginning and 37.6MB in the end (delta: -11.4MB). Peak memory consumption was 6.0MB. Max. memory is 16.1GB. [2022-07-21 17:58:06,122 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.32ms. Allocated memory is still 62.9MB. Free memory was 37.6MB in the beginning and 35.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:58:06,123 INFO L158 Benchmark]: Boogie Preprocessor took 41.84ms. Allocated memory is still 62.9MB. Free memory was 35.4MB in the beginning and 33.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:58:06,124 INFO L158 Benchmark]: RCFGBuilder took 438.56ms. Allocated memory is still 62.9MB. Free memory was 33.8MB in the beginning and 33.2MB in the end (delta: 638.6kB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. [2022-07-21 17:58:06,124 INFO L158 Benchmark]: TraceAbstraction took 33998.30ms. Allocated memory was 62.9MB in the beginning and 161.5MB in the end (delta: 98.6MB). Free memory was 32.7MB in the beginning and 88.7MB in the end (delta: -56.0MB). Peak memory consumption was 42.5MB. Max. memory is 16.1GB. [2022-07-21 17:58:06,125 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 50.3MB. Free memory was 31.7MB in the beginning and 31.6MB in the end (delta: 37.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 517.27ms. Allocated memory was 50.3MB in the beginning and 62.9MB in the end (delta: 12.6MB). Free memory was 26.2MB in the beginning and 37.6MB in the end (delta: -11.4MB). Peak memory consumption was 6.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 73.32ms. Allocated memory is still 62.9MB. Free memory was 37.6MB in the beginning and 35.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.84ms. Allocated memory is still 62.9MB. Free memory was 35.4MB in the beginning and 33.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 438.56ms. Allocated memory is still 62.9MB. Free memory was 33.8MB in the beginning and 33.2MB in the end (delta: 638.6kB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. * TraceAbstraction took 33998.30ms. Allocated memory was 62.9MB in the beginning and 161.5MB in the end (delta: 98.6MB). Free memory was 32.7MB in the beginning and 88.7MB in the end (delta: -56.0MB). Peak memory consumption was 42.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:233) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-21 17:58:06,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/memsafety-bftpd/bftpd_2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:58:08,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:58:08,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:58:08,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:58:08,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:58:08,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:58:08,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:58:08,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:58:08,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:58:08,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:58:08,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:58:08,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:58:08,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:58:08,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:58:08,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:58:08,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:58:08,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:58:08,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:58:08,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:58:08,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:58:08,115 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:58:08,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:58:08,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:58:08,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:58:08,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:58:08,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:58:08,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:58:08,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:58:08,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:58:08,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:58:08,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:58:08,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:58:08,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:58:08,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:58:08,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:58:08,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:58:08,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:58:08,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:58:08,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:58:08,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:58:08,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:58:08,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:58:08,149 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-21 17:58:08,175 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:58:08,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:58:08,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:58:08,177 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:58:08,177 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:58:08,178 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:58:08,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:58:08,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:58:08,179 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:58:08,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:58:08,180 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:58:08,180 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:58:08,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:58:08,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:58:08,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:58:08,181 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:58:08,181 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:58:08,181 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:58:08,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:58:08,182 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:58:08,182 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 17:58:08,182 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 17:58:08,182 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:58:08,183 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:58:08,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:58:08,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:58:08,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:58:08,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:58:08,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:58:08,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:58:08,184 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 17:58:08,184 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 17:58:08,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 17:58:08,185 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-07-21 17:58:08,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:58:08,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:58:08,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:58:08,548 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:58:08,549 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:58:08,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-07-21 17:58:08,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/881d44295/79aef8133ce849a892b72dc8ba53072b/FLAG7f2a63253 [2022-07-21 17:58:09,134 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:58:09,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-07-21 17:58:09,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/881d44295/79aef8133ce849a892b72dc8ba53072b/FLAG7f2a63253 [2022-07-21 17:58:09,607 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/881d44295/79aef8133ce849a892b72dc8ba53072b [2022-07-21 17:58:09,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:58:09,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:58:09,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:58:09,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:58:09,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:58:09,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:58:09" (1/1) ... [2022-07-21 17:58:09,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44975b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:58:09, skipping insertion in model container [2022-07-21 17:58:09,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:58:09" (1/1) ... [2022-07-21 17:58:09,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:58:09,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:58:09,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:58:09,998 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:58:10,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:58:10,065 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:58:10,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:58:10 WrapperNode [2022-07-21 17:58:10,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:58:10,067 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:58:10,067 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:58:10,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:58:10,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:58:10" (1/1) ... [2022-07-21 17:58:10,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:58:10" (1/1) ... [2022-07-21 17:58:10,122 INFO L137 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2022-07-21 17:58:10,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:58:10,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:58:10,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:58:10,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:58:10,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:58:10" (1/1) ... [2022-07-21 17:58:10,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:58:10" (1/1) ... [2022-07-21 17:58:10,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:58:10" (1/1) ... [2022-07-21 17:58:10,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:58:10" (1/1) ... [2022-07-21 17:58:10,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:58:10" (1/1) ... [2022-07-21 17:58:10,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:58:10" (1/1) ... [2022-07-21 17:58:10,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:58:10" (1/1) ... [2022-07-21 17:58:10,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:58:10,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:58:10,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:58:10,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:58:10,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:58:10" (1/1) ... [2022-07-21 17:58:10,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:58:10,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:58:10,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 17:58:10,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 17:58:10,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-21 17:58:10,230 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-07-21 17:58:10,230 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-07-21 17:58:10,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:58:10,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:58:10,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:58:10,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:58:10,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 17:58:10,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 17:58:10,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:58:10,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:58:10,329 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:58:10,331 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:58:10,590 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:58:10,596 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:58:10,596 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 17:58:10,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:58:10 BoogieIcfgContainer [2022-07-21 17:58:10,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:58:10,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:58:10,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:58:10,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:58:10,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:58:09" (1/3) ... [2022-07-21 17:58:10,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74205eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:58:10, skipping insertion in model container [2022-07-21 17:58:10,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:58:10" (2/3) ... [2022-07-21 17:58:10,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74205eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:58:10, skipping insertion in model container [2022-07-21 17:58:10,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:58:10" (3/3) ... [2022-07-21 17:58:10,605 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-07-21 17:58:10,618 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:58:10,618 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-07-21 17:58:10,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:58:10,663 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7c0907c6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1f8ef6a [2022-07-21 17:58:10,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-07-21 17:58:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:58:10,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:58:10,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:10,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:58:10,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:10,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:10,684 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2022-07-21 17:58:10,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:10,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630629355] [2022-07-21 17:58:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:10,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:10,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:10,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:10,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 17:58:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:10,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:58:10,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:10,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:58:10,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:10,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630629355] [2022-07-21 17:58:10,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630629355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:58:10,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:58:10,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-21 17:58:10,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382983638] [2022-07-21 17:58:10,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:58:10,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:58:10,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:10,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:58:10,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:58:10,958 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:11,137 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2022-07-21 17:58:11,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:58:11,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 17:58:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:11,156 INFO L225 Difference]: With dead ends: 110 [2022-07-21 17:58:11,159 INFO L226 Difference]: Without dead ends: 106 [2022-07-21 17:58:11,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:58:11,169 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 52 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:11,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:58:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-21 17:58:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2022-07-21 17:58:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 76 states have internal predecessors, (97), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:58:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2022-07-21 17:58:11,228 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 6 [2022-07-21 17:58:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:11,229 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2022-07-21 17:58:11,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2022-07-21 17:58:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:58:11,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:11,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:58:11,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:11,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:11,442 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:11,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:11,443 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2022-07-21 17:58:11,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:11,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825630997] [2022-07-21 17:58:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:11,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:11,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:11,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:11,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 17:58:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:11,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:58:11,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:11,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:58:11,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:11,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825630997] [2022-07-21 17:58:11,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825630997] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:58:11,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:58:11,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:58:11,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262478421] [2022-07-21 17:58:11,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:58:11,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:58:11,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:58:11,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:58:11,602 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:11,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:11,803 INFO L93 Difference]: Finished difference Result 206 states and 278 transitions. [2022-07-21 17:58:11,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:58:11,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 17:58:11,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:11,806 INFO L225 Difference]: With dead ends: 206 [2022-07-21 17:58:11,806 INFO L226 Difference]: Without dead ends: 206 [2022-07-21 17:58:11,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:58:11,808 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 125 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:11,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 142 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:58:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-21 17:58:11,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2022-07-21 17:58:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 119 states have (on average 1.7394957983193278) internal successors, (207), 138 states have internal predecessors, (207), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-21 17:58:11,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 238 transitions. [2022-07-21 17:58:11,836 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 238 transitions. Word has length 6 [2022-07-21 17:58:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:11,837 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 238 transitions. [2022-07-21 17:58:11,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:11,837 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 238 transitions. [2022-07-21 17:58:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:58:11,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:11,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:11,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:12,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:12,048 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:12,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:12,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2022-07-21 17:58:12,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:12,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043061706] [2022-07-21 17:58:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:12,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:12,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:12,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:12,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 17:58:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:12,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:58:12,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:12,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:58:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:12,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:58:12,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:12,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043061706] [2022-07-21 17:58:12,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043061706] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:58:12,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:58:12,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:58:12,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303041426] [2022-07-21 17:58:12,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:58:12,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:58:12,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:12,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:58:12,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:58:12,252 INFO L87 Difference]: Start difference. First operand 152 states and 238 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:12,497 INFO L93 Difference]: Finished difference Result 228 states and 325 transitions. [2022-07-21 17:58:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:58:12,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 17:58:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:12,500 INFO L225 Difference]: With dead ends: 228 [2022-07-21 17:58:12,500 INFO L226 Difference]: Without dead ends: 228 [2022-07-21 17:58:12,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:58:12,501 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 136 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:12,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 164 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:58:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-21 17:58:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2022-07-21 17:58:12,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.721311475409836) internal successors, (210), 141 states have internal predecessors, (210), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-21 17:58:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 241 transitions. [2022-07-21 17:58:12,526 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 241 transitions. Word has length 7 [2022-07-21 17:58:12,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:12,526 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 241 transitions. [2022-07-21 17:58:12,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 241 transitions. [2022-07-21 17:58:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 17:58:12,527 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:12,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:12,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:12,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:12,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:12,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:12,744 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2022-07-21 17:58:12,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:12,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922323232] [2022-07-21 17:58:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:12,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:12,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:12,746 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:12,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 17:58:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:12,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:58:12,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:12,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:58:12,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:58:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:12,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:58:12,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:12,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922323232] [2022-07-21 17:58:12,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922323232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:58:12,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:58:12,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:58:12,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567549597] [2022-07-21 17:58:12,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:58:12,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:58:12,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:12,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:58:12,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:58:12,946 INFO L87 Difference]: Start difference. First operand 155 states and 241 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:13,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:13,149 INFO L93 Difference]: Finished difference Result 208 states and 279 transitions. [2022-07-21 17:58:13,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:58:13,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 17:58:13,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:13,151 INFO L225 Difference]: With dead ends: 208 [2022-07-21 17:58:13,152 INFO L226 Difference]: Without dead ends: 208 [2022-07-21 17:58:13,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:58:13,153 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 128 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:13,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 190 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:58:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-21 17:58:13,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2022-07-21 17:58:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.7049180327868851) internal successors, (208), 141 states have internal predecessors, (208), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-21 17:58:13,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 239 transitions. [2022-07-21 17:58:13,174 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 239 transitions. Word has length 8 [2022-07-21 17:58:13,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:13,174 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 239 transitions. [2022-07-21 17:58:13,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:13,174 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 239 transitions. [2022-07-21 17:58:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 17:58:13,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:13,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:13,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:13,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:13,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:13,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:13,385 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2022-07-21 17:58:13,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:13,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832533603] [2022-07-21 17:58:13,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:13,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:13,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:13,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:13,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 17:58:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:13,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:58:13,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:13,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:58:13,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:13,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832533603] [2022-07-21 17:58:13,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832533603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:58:13,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:58:13,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:58:13,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681566889] [2022-07-21 17:58:13,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:58:13,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:58:13,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:13,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:58:13,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:58:13,498 INFO L87 Difference]: Start difference. First operand 155 states and 239 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:13,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:13,675 INFO L93 Difference]: Finished difference Result 234 states and 321 transitions. [2022-07-21 17:58:13,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:58:13,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 17:58:13,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:13,677 INFO L225 Difference]: With dead ends: 234 [2022-07-21 17:58:13,677 INFO L226 Difference]: Without dead ends: 234 [2022-07-21 17:58:13,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:58:13,678 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 140 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:13,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 183 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:58:13,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-21 17:58:13,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 191. [2022-07-21 17:58:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 156 states have (on average 1.6538461538461537) internal successors, (258), 176 states have internal predecessors, (258), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-21 17:58:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 289 transitions. [2022-07-21 17:58:13,690 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 289 transitions. Word has length 9 [2022-07-21 17:58:13,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:13,690 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 289 transitions. [2022-07-21 17:58:13,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 289 transitions. [2022-07-21 17:58:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 17:58:13,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:13,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:13,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-21 17:58:13,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:13,908 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:13,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:13,909 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2022-07-21 17:58:13,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:13,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409343950] [2022-07-21 17:58:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:13,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:13,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:13,910 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:13,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 17:58:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:13,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:58:13,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:14,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:58:14,017 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:14,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409343950] [2022-07-21 17:58:14,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409343950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:58:14,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:58:14,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:58:14,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046715016] [2022-07-21 17:58:14,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:58:14,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:58:14,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:14,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:58:14,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:58:14,020 INFO L87 Difference]: Start difference. First operand 191 states and 289 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:14,212 INFO L93 Difference]: Finished difference Result 231 states and 304 transitions. [2022-07-21 17:58:14,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:58:14,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-21 17:58:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:14,214 INFO L225 Difference]: With dead ends: 231 [2022-07-21 17:58:14,214 INFO L226 Difference]: Without dead ends: 231 [2022-07-21 17:58:14,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:58:14,215 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:14,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 227 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:58:14,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-21 17:58:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2022-07-21 17:58:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 186 states have internal predecessors, (271), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-21 17:58:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 302 transitions. [2022-07-21 17:58:14,232 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 302 transitions. Word has length 10 [2022-07-21 17:58:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:14,233 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 302 transitions. [2022-07-21 17:58:14,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:14,234 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 302 transitions. [2022-07-21 17:58:14,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 17:58:14,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:14,239 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:14,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-21 17:58:14,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:14,445 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:14,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:14,446 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2022-07-21 17:58:14,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:14,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346477220] [2022-07-21 17:58:14,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:14,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:14,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:14,448 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:14,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 17:58:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:14,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:58:14,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:14,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:58:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:15,143 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:15,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346477220] [2022-07-21 17:58:15,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346477220] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:58:15,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:58:15,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-07-21 17:58:15,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335866042] [2022-07-21 17:58:15,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:58:15,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:58:15,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:15,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:58:15,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:58:15,145 INFO L87 Difference]: Start difference. First operand 201 states and 302 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:15,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:15,644 INFO L93 Difference]: Finished difference Result 367 states and 495 transitions. [2022-07-21 17:58:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:58:15,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-21 17:58:15,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:15,647 INFO L225 Difference]: With dead ends: 367 [2022-07-21 17:58:15,647 INFO L226 Difference]: Without dead ends: 367 [2022-07-21 17:58:15,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:58:15,648 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 258 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:15,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 312 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:58:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-07-21 17:58:15,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 239. [2022-07-21 17:58:15,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 200 states have (on average 1.62) internal successors, (324), 224 states have internal predecessors, (324), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-07-21 17:58:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 363 transitions. [2022-07-21 17:58:15,662 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 363 transitions. Word has length 14 [2022-07-21 17:58:15,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:15,662 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 363 transitions. [2022-07-21 17:58:15,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 363 transitions. [2022-07-21 17:58:15,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 17:58:15,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:15,663 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:15,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:15,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:15,878 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:15,878 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2022-07-21 17:58:15,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:15,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4455636] [2022-07-21 17:58:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:15,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:15,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:15,880 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:15,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 17:58:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:15,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:58:15,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:16,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:58:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:16,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:58:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:16,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:16,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4455636] [2022-07-21 17:58:16,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4455636] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:58:16,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:58:16,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-21 17:58:16,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934610098] [2022-07-21 17:58:16,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:58:16,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:58:16,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:16,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:58:16,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:58:16,240 INFO L87 Difference]: Start difference. First operand 239 states and 363 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:16,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:16,652 INFO L93 Difference]: Finished difference Result 405 states and 567 transitions. [2022-07-21 17:58:16,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:58:16,653 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-21 17:58:16,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:16,655 INFO L225 Difference]: With dead ends: 405 [2022-07-21 17:58:16,655 INFO L226 Difference]: Without dead ends: 405 [2022-07-21 17:58:16,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:58:16,656 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 267 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:16,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 323 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:58:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-07-21 17:58:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 249. [2022-07-21 17:58:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 210 states have (on average 1.6142857142857143) internal successors, (339), 234 states have internal predecessors, (339), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-07-21 17:58:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 378 transitions. [2022-07-21 17:58:16,667 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 378 transitions. Word has length 15 [2022-07-21 17:58:16,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:16,668 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 378 transitions. [2022-07-21 17:58:16,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 378 transitions. [2022-07-21 17:58:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 17:58:16,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:16,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:16,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:16,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:16,878 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:16,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:16,879 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2022-07-21 17:58:16,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:16,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834833278] [2022-07-21 17:58:16,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:16,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:16,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:16,881 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:16,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 17:58:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:16,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 17:58:16,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:17,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:58:17,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:58:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:17,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:58:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:17,351 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:17,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834833278] [2022-07-21 17:58:17,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834833278] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:58:17,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:58:17,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-21 17:58:17,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496705866] [2022-07-21 17:58:17,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:58:17,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:58:17,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:17,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:58:17,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:58:17,352 INFO L87 Difference]: Start difference. First operand 249 states and 378 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:18,309 INFO L93 Difference]: Finished difference Result 626 states and 845 transitions. [2022-07-21 17:58:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:58:18,311 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-21 17:58:18,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:18,314 INFO L225 Difference]: With dead ends: 626 [2022-07-21 17:58:18,314 INFO L226 Difference]: Without dead ends: 626 [2022-07-21 17:58:18,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:58:18,315 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 460 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:18,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 606 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 17:58:18,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-07-21 17:58:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 349. [2022-07-21 17:58:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 303 states have (on average 1.6336633663366336) internal successors, (495), 330 states have internal predecessors, (495), 11 states have call successors, (11), 7 states have call predecessors, (11), 15 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2022-07-21 17:58:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 548 transitions. [2022-07-21 17:58:18,335 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 548 transitions. Word has length 16 [2022-07-21 17:58:18,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:18,335 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 548 transitions. [2022-07-21 17:58:18,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 548 transitions. [2022-07-21 17:58:18,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 17:58:18,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:18,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:18,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:18,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:18,549 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:18,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:18,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2022-07-21 17:58:18,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:18,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137968958] [2022-07-21 17:58:18,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:18,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:18,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:18,552 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:18,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 17:58:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:18,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:58:18,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:18,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:58:18,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:18,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137968958] [2022-07-21 17:58:18,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137968958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:58:18,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:58:18,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:58:18,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593710601] [2022-07-21 17:58:18,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:58:18,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:58:18,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:18,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:58:18,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:58:18,670 INFO L87 Difference]: Start difference. First operand 349 states and 548 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:18,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:18,694 INFO L93 Difference]: Finished difference Result 378 states and 554 transitions. [2022-07-21 17:58:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:58:18,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 17:58:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:18,697 INFO L225 Difference]: With dead ends: 378 [2022-07-21 17:58:18,697 INFO L226 Difference]: Without dead ends: 378 [2022-07-21 17:58:18,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:58:18,698 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 27 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:18,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 118 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:58:18,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-07-21 17:58:18,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 367. [2022-07-21 17:58:18,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 318 states have (on average 1.5628930817610063) internal successors, (497), 347 states have internal predecessors, (497), 11 states have call successors, (11), 8 states have call predecessors, (11), 18 states have return successors, (43), 11 states have call predecessors, (43), 11 states have call successors, (43) [2022-07-21 17:58:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 551 transitions. [2022-07-21 17:58:18,711 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 551 transitions. Word has length 18 [2022-07-21 17:58:18,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:18,712 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 551 transitions. [2022-07-21 17:58:18,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:18,712 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 551 transitions. [2022-07-21 17:58:18,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 17:58:18,713 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:18,713 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-21 17:58:18,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:18,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:18,927 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:18,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:18,927 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 2 times [2022-07-21 17:58:18,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:18,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142882166] [2022-07-21 17:58:18,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:58:18,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:18,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:18,929 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:18,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 17:58:18,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:58:18,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:58:18,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:58:18,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:19,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:58:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:19,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:19,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142882166] [2022-07-21 17:58:19,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142882166] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:58:19,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:58:19,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-07-21 17:58:19,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64511789] [2022-07-21 17:58:19,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:58:19,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:58:19,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:19,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:58:19,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:58:19,933 INFO L87 Difference]: Start difference. First operand 367 states and 551 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:21,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:21,823 INFO L93 Difference]: Finished difference Result 620 states and 878 transitions. [2022-07-21 17:58:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:58:21,825 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-21 17:58:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:21,828 INFO L225 Difference]: With dead ends: 620 [2022-07-21 17:58:21,829 INFO L226 Difference]: Without dead ends: 620 [2022-07-21 17:58:21,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:58:21,830 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 458 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:21,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 360 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-21 17:58:21,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-07-21 17:58:21,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 402. [2022-07-21 17:58:21,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 354 states have (on average 1.612994350282486) internal successors, (571), 382 states have internal predecessors, (571), 11 states have call successors, (11), 8 states have call predecessors, (11), 17 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-07-21 17:58:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 618 transitions. [2022-07-21 17:58:21,843 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 618 transitions. Word has length 22 [2022-07-21 17:58:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:21,844 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 618 transitions. [2022-07-21 17:58:21,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:58:21,845 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 618 transitions. [2022-07-21 17:58:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:58:21,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:21,848 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:21,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:22,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:22,058 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:22,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:22,059 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2022-07-21 17:58:22,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:22,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36217832] [2022-07-21 17:58:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:22,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:22,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:22,061 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:22,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 17:58:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:22,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 17:58:22,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:22,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:58:22,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:22,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36217832] [2022-07-21 17:58:22,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36217832] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:58:22,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:58:22,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:58:22,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622294232] [2022-07-21 17:58:22,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:58:22,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:58:22,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:22,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:58:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:58:22,131 INFO L87 Difference]: Start difference. First operand 402 states and 618 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:58:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:22,139 INFO L93 Difference]: Finished difference Result 303 states and 456 transitions. [2022-07-21 17:58:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:58:22,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-07-21 17:58:22,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:22,142 INFO L225 Difference]: With dead ends: 303 [2022-07-21 17:58:22,142 INFO L226 Difference]: Without dead ends: 303 [2022-07-21 17:58:22,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:58:22,144 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:22,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:58:22,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-21 17:58:22,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2022-07-21 17:58:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 263 states have (on average 1.6121673003802282) internal successors, (424), 288 states have internal predecessors, (424), 8 states have call successors, (8), 6 states have call predecessors, (8), 12 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-07-21 17:58:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 456 transitions. [2022-07-21 17:58:22,153 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 456 transitions. Word has length 25 [2022-07-21 17:58:22,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:22,153 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 456 transitions. [2022-07-21 17:58:22,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:58:22,153 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 456 transitions. [2022-07-21 17:58:22,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 17:58:22,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:22,157 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:22,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:22,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:22,366 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:22,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:22,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2022-07-21 17:58:22,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:22,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966692506] [2022-07-21 17:58:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:22,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:22,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:22,369 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:22,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-21 17:58:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:22,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 17:58:22,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:24,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:24,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:58:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:24,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:58:27,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:27,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966692506] [2022-07-21 17:58:27,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966692506] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:58:27,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [491269845] [2022-07-21 17:58:27,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:27,315 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:58:27,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:58:27,317 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:58:27,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-07-21 17:58:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:27,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 17:58:27,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:29,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:29,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:58:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:29,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:58:32,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [491269845] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:58:32,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:58:32,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-07-21 17:58:32,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298832910] [2022-07-21 17:58:32,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:58:32,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:58:32,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:32,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:58:32,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=64, Unknown=2, NotChecked=0, Total=90 [2022-07-21 17:58:32,188 INFO L87 Difference]: Start difference. First operand 303 states and 456 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:58:36,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:36,750 INFO L93 Difference]: Finished difference Result 526 states and 738 transitions. [2022-07-21 17:58:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:58:36,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-07-21 17:58:36,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:36,753 INFO L225 Difference]: With dead ends: 526 [2022-07-21 17:58:36,753 INFO L226 Difference]: Without dead ends: 526 [2022-07-21 17:58:36,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=74, Invalid=162, Unknown=4, NotChecked=0, Total=240 [2022-07-21 17:58:36,754 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 297 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:36,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 203 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 121 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-07-21 17:58:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-07-21 17:58:36,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 426. [2022-07-21 17:58:36,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 379 states have (on average 1.6094986807387863) internal successors, (610), 407 states have internal predecessors, (610), 10 states have call successors, (10), 8 states have call predecessors, (10), 17 states have return successors, (34), 10 states have call predecessors, (34), 10 states have call successors, (34) [2022-07-21 17:58:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 654 transitions. [2022-07-21 17:58:36,764 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 654 transitions. Word has length 27 [2022-07-21 17:58:36,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:36,764 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 654 transitions. [2022-07-21 17:58:36,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:58:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 654 transitions. [2022-07-21 17:58:36,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 17:58:36,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:36,765 INFO L195 NwaCegarLoop]: 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] [2022-07-21 17:58:36,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:36,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:37,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:37,169 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2022-07-21 17:58:37,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:37,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639701827] [2022-07-21 17:58:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:37,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:37,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:37,171 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:37,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-21 17:58:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:37,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:58:37,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:37,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:58:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:37,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:37,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639701827] [2022-07-21 17:58:37,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639701827] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:58:37,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:58:37,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-07-21 17:58:37,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901519954] [2022-07-21 17:58:37,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:58:37,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:58:37,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:37,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:58:37,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:58:37,514 INFO L87 Difference]: Start difference. First operand 426 states and 654 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:58:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:38,081 INFO L93 Difference]: Finished difference Result 593 states and 828 transitions. [2022-07-21 17:58:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:58:38,081 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-07-21 17:58:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:38,083 INFO L225 Difference]: With dead ends: 593 [2022-07-21 17:58:38,083 INFO L226 Difference]: Without dead ends: 593 [2022-07-21 17:58:38,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:58:38,084 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 305 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:38,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 277 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:58:38,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-07-21 17:58:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 518. [2022-07-21 17:58:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 468 states have (on average 1.5320512820512822) internal successors, (717), 497 states have internal predecessors, (717), 10 states have call successors, (10), 10 states have call predecessors, (10), 20 states have return successors, (34), 10 states have call predecessors, (34), 10 states have call successors, (34) [2022-07-21 17:58:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 761 transitions. [2022-07-21 17:58:38,097 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 761 transitions. Word has length 28 [2022-07-21 17:58:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:38,097 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 761 transitions. [2022-07-21 17:58:38,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:58:38,097 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 761 transitions. [2022-07-21 17:58:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:58:38,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:38,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:38,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:38,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:38,312 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:38,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:38,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1128469823, now seen corresponding path program 1 times [2022-07-21 17:58:38,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:38,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66541317] [2022-07-21 17:58:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:38,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:38,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:38,315 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:38,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-21 17:58:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:38,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:58:38,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:38,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:58:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:38,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:38,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66541317] [2022-07-21 17:58:38,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66541317] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:58:38,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:58:38,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-21 17:58:38,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673778855] [2022-07-21 17:58:38,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:58:38,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:58:38,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:38,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:58:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:58:38,711 INFO L87 Difference]: Start difference. First operand 518 states and 761 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:58:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:39,283 INFO L93 Difference]: Finished difference Result 571 states and 788 transitions. [2022-07-21 17:58:39,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:58:39,292 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-07-21 17:58:39,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:39,295 INFO L225 Difference]: With dead ends: 571 [2022-07-21 17:58:39,295 INFO L226 Difference]: Without dead ends: 571 [2022-07-21 17:58:39,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-07-21 17:58:39,303 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 348 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:39,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 316 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:58:39,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-07-21 17:58:39,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 522. [2022-07-21 17:58:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 471 states have (on average 1.494692144373673) internal successors, (704), 501 states have internal predecessors, (704), 10 states have call successors, (10), 10 states have call predecessors, (10), 21 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-07-21 17:58:39,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 746 transitions. [2022-07-21 17:58:39,330 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 746 transitions. Word has length 29 [2022-07-21 17:58:39,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:39,330 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 746 transitions. [2022-07-21 17:58:39,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:58:39,330 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 746 transitions. [2022-07-21 17:58:39,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:58:39,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:39,333 INFO L195 NwaCegarLoop]: 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] [2022-07-21 17:58:39,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:39,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:39,542 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:39,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:39,543 INFO L85 PathProgramCache]: Analyzing trace with hash -221078483, now seen corresponding path program 1 times [2022-07-21 17:58:39,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:39,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241556595] [2022-07-21 17:58:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:39,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:39,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:39,545 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:39,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-21 17:58:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:39,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 17:58:39,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:42,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:42,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:58:42,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:58:42,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:58:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:42,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:58:44,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:44,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241556595] [2022-07-21 17:58:44,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241556595] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:58:44,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1397680569] [2022-07-21 17:58:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:44,489 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:58:44,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:58:44,490 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:58:44,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-07-21 17:58:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:44,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 17:58:44,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:49,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:49,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:58:49,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:58:49,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:58:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:49,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:58:51,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1397680569] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:58:51,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:58:51,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2022-07-21 17:58:51,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194351648] [2022-07-21 17:58:51,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:58:51,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:58:51,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:51,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:58:51,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2022-07-21 17:58:51,378 INFO L87 Difference]: Start difference. First operand 522 states and 746 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:58:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:58,204 INFO L93 Difference]: Finished difference Result 705 states and 930 transitions. [2022-07-21 17:58:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:58:58,205 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-07-21 17:58:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:58,207 INFO L225 Difference]: With dead ends: 705 [2022-07-21 17:58:58,208 INFO L226 Difference]: Without dead ends: 705 [2022-07-21 17:58:58,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2022-07-21 17:58:58,208 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 255 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:58,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 293 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 218 Invalid, 0 Unknown, 74 Unchecked, 0.5s Time] [2022-07-21 17:58:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-07-21 17:58:58,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 527. [2022-07-21 17:58:58,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 479 states have (on average 1.5052192066805845) internal successors, (721), 506 states have internal predecessors, (721), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-21 17:58:58,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 757 transitions. [2022-07-21 17:58:58,222 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 757 transitions. Word has length 29 [2022-07-21 17:58:58,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:58,222 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 757 transitions. [2022-07-21 17:58:58,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:58:58,223 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 757 transitions. [2022-07-21 17:58:58,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 17:58:58,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:58,224 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:58,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:58,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:58,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:58,627 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:58:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:58,627 INFO L85 PathProgramCache]: Analyzing trace with hash -117381739, now seen corresponding path program 1 times [2022-07-21 17:58:58,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:58,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536348371] [2022-07-21 17:58:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:58,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:58,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:58,629 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:58,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-21 17:58:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:58,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 17:58:58,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:59:01,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:59:01,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:59:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:59:01,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:59:04,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:59:04,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536348371] [2022-07-21 17:59:04,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536348371] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:59:04,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [276264243] [2022-07-21 17:59:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:59:04,161 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:59:04,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:59:04,162 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:59:04,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-07-21 17:59:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:59:04,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 17:59:04,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:59:06,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:59:06,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:59:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:59:06,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:59:09,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [276264243] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:59:09,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:59:09,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-21 17:59:09,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724392269] [2022-07-21 17:59:09,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:59:09,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:59:09,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:59:09,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:59:09,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=98, Unknown=2, NotChecked=0, Total=132 [2022-07-21 17:59:09,334 INFO L87 Difference]: Start difference. First operand 527 states and 757 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:59:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:59:14,105 INFO L93 Difference]: Finished difference Result 836 states and 1086 transitions. [2022-07-21 17:59:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 17:59:14,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-07-21 17:59:14,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:59:14,109 INFO L225 Difference]: With dead ends: 836 [2022-07-21 17:59:14,109 INFO L226 Difference]: Without dead ends: 836 [2022-07-21 17:59:14,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=106, Invalid=270, Unknown=4, NotChecked=0, Total=380 [2022-07-21 17:59:14,110 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 422 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:59:14,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 315 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 198 Invalid, 0 Unknown, 79 Unchecked, 0.5s Time] [2022-07-21 17:59:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-07-21 17:59:14,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 529. [2022-07-21 17:59:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 481 states have (on average 1.4636174636174637) internal successors, (704), 508 states have internal predecessors, (704), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-21 17:59:14,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 740 transitions. [2022-07-21 17:59:14,132 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 740 transitions. Word has length 35 [2022-07-21 17:59:14,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:59:14,134 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 740 transitions. [2022-07-21 17:59:14,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:59:14,134 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 740 transitions. [2022-07-21 17:59:14,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 17:59:14,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:59:14,135 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:59:14,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-21 17:59:14,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-07-21 17:59:14,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:59:14,549 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:59:14,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:59:14,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1271207958, now seen corresponding path program 1 times [2022-07-21 17:59:14,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:59:14,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213332425] [2022-07-21 17:59:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:59:14,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:59:14,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:59:14,552 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:59:14,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-21 17:59:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:59:14,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:59:14,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:59:15,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-07-21 17:59:15,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-21 17:59:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:59:15,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:59:16,088 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-21 17:59:16,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2022-07-21 17:59:16,098 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-07-21 17:59:16,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 12 [2022-07-21 17:59:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:59:16,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:59:16,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213332425] [2022-07-21 17:59:16,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213332425] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:59:16,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:59:16,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-21 17:59:16,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565660270] [2022-07-21 17:59:16,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:59:16,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:59:16,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:59:16,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:59:16,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:59:16,133 INFO L87 Difference]: Start difference. First operand 529 states and 740 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:59:16,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:59:16,833 INFO L93 Difference]: Finished difference Result 576 states and 756 transitions. [2022-07-21 17:59:16,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:59:16,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-07-21 17:59:16,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:59:16,837 INFO L225 Difference]: With dead ends: 576 [2022-07-21 17:59:16,837 INFO L226 Difference]: Without dead ends: 576 [2022-07-21 17:59:16,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-21 17:59:16,838 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 231 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:59:16,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 410 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:59:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-07-21 17:59:16,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 486. [2022-07-21 17:59:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 441 states have (on average 1.4285714285714286) internal successors, (630), 467 states have internal predecessors, (630), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-07-21 17:59:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 662 transitions. [2022-07-21 17:59:16,851 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 662 transitions. Word has length 39 [2022-07-21 17:59:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:59:16,852 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 662 transitions. [2022-07-21 17:59:16,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:59:16,852 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 662 transitions. [2022-07-21 17:59:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 17:59:16,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:59:16,853 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 17:59:16,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-21 17:59:17,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:59:17,059 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:59:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:59:17,060 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2022-07-21 17:59:17,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:59:17,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902487979] [2022-07-21 17:59:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:59:17,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:59:17,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:59:17,069 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:59:17,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-21 17:59:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:59:17,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:59:17,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:59:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:59:17,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:59:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:59:17,279 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:59:17,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902487979] [2022-07-21 17:59:17,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902487979] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:59:17,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:59:17,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-21 17:59:17,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286958174] [2022-07-21 17:59:17,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:59:17,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:59:17,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:59:17,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:59:17,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:59:17,280 INFO L87 Difference]: Start difference. First operand 486 states and 662 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:59:17,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:59:17,316 INFO L93 Difference]: Finished difference Result 496 states and 668 transitions. [2022-07-21 17:59:17,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:59:17,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-07-21 17:59:17,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:59:17,318 INFO L225 Difference]: With dead ends: 496 [2022-07-21 17:59:17,318 INFO L226 Difference]: Without dead ends: 496 [2022-07-21 17:59:17,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:59:17,319 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 51 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:59:17,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 113 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:59:17,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-07-21 17:59:17,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 484. [2022-07-21 17:59:17,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 441 states have (on average 1.4149659863945578) internal successors, (624), 465 states have internal predecessors, (624), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-07-21 17:59:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 656 transitions. [2022-07-21 17:59:17,330 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 656 transitions. Word has length 40 [2022-07-21 17:59:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:59:17,330 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 656 transitions. [2022-07-21 17:59:17,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:59:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 656 transitions. [2022-07-21 17:59:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 17:59:17,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:59:17,331 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 17:59:17,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-21 17:59:17,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:59:17,540 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:59:17,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:59:17,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2022-07-21 17:59:17,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:59:17,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646441283] [2022-07-21 17:59:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:59:17,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:59:17,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:59:17,543 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:59:17,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-21 17:59:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:59:17,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:59:17,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:59:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:59:17,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:59:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:59:17,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:59:17,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646441283] [2022-07-21 17:59:17,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646441283] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:59:17,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:59:17,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-07-21 17:59:17,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997035195] [2022-07-21 17:59:17,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:59:17,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:59:17,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:59:17,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:59:17,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:59:17,890 INFO L87 Difference]: Start difference. First operand 484 states and 656 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:59:18,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:59:18,118 INFO L93 Difference]: Finished difference Result 432 states and 566 transitions. [2022-07-21 17:59:18,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:59:18,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-07-21 17:59:18,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:59:18,121 INFO L225 Difference]: With dead ends: 432 [2022-07-21 17:59:18,121 INFO L226 Difference]: Without dead ends: 432 [2022-07-21 17:59:18,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:59:18,122 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 137 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:59:18,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 162 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:59:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-07-21 17:59:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 402. [2022-07-21 17:59:18,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 366 states have (on average 1.407103825136612) internal successors, (515), 385 states have internal predecessors, (515), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-21 17:59:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 539 transitions. [2022-07-21 17:59:18,139 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 539 transitions. Word has length 41 [2022-07-21 17:59:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:59:18,139 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 539 transitions. [2022-07-21 17:59:18,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:59:18,140 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 539 transitions. [2022-07-21 17:59:18,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 17:59:18,140 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:59:18,140 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 17:59:18,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-21 17:59:18,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:59:18,351 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:59:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:59:18,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2022-07-21 17:59:18,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:59:18,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389320951] [2022-07-21 17:59:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:59:18,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:59:18,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:59:18,353 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:59:18,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-21 17:59:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:59:18,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:59:18,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:59:18,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:59:18,543 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:59:18,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-21 17:59:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:59:18,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:59:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:59:18,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:59:18,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389320951] [2022-07-21 17:59:18,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389320951] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:59:18,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:59:18,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-21 17:59:18,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542869814] [2022-07-21 17:59:18,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:59:18,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:59:18,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:59:18,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:59:18,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:59:18,693 INFO L87 Difference]: Start difference. First operand 402 states and 539 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:59:18,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:59:18,896 INFO L93 Difference]: Finished difference Result 434 states and 560 transitions. [2022-07-21 17:59:18,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:59:18,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-07-21 17:59:18,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:59:18,897 INFO L225 Difference]: With dead ends: 434 [2022-07-21 17:59:18,897 INFO L226 Difference]: Without dead ends: 434 [2022-07-21 17:59:18,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:59:18,898 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 36 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:59:18,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 163 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:59:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-07-21 17:59:18,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 410. [2022-07-21 17:59:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.3983957219251337) internal successors, (523), 393 states have internal predecessors, (523), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-21 17:59:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 547 transitions. [2022-07-21 17:59:18,907 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 547 transitions. Word has length 42 [2022-07-21 17:59:18,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:59:18,907 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 547 transitions. [2022-07-21 17:59:18,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:59:18,908 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 547 transitions. [2022-07-21 17:59:18,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 17:59:18,908 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:59:18,908 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:59:18,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-21 17:59:19,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:59:19,119 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:59:19,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:59:19,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1701301426, now seen corresponding path program 1 times [2022-07-21 17:59:19,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:59:19,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836208533] [2022-07-21 17:59:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:59:19,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:59:19,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:59:19,121 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:59:19,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-21 17:59:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:59:19,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:59:19,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:59:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:59:19,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:59:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:59:19,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:59:19,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836208533] [2022-07-21 17:59:19,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836208533] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:59:19,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:59:19,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-21 17:59:19,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690635585] [2022-07-21 17:59:19,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:59:19,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:59:19,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:59:19,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:59:19,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:59:19,463 INFO L87 Difference]: Start difference. First operand 410 states and 547 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:59:19,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:59:19,665 INFO L93 Difference]: Finished difference Result 413 states and 499 transitions. [2022-07-21 17:59:19,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:59:19,669 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-07-21 17:59:19,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:59:19,671 INFO L225 Difference]: With dead ends: 413 [2022-07-21 17:59:19,671 INFO L226 Difference]: Without dead ends: 413 [2022-07-21 17:59:19,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:59:19,671 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 178 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:59:19,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 356 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:59:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-07-21 17:59:19,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 352. [2022-07-21 17:59:19,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 316 states have (on average 1.3227848101265822) internal successors, (418), 335 states have internal predecessors, (418), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-21 17:59:19,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 442 transitions. [2022-07-21 17:59:19,685 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 442 transitions. Word has length 44 [2022-07-21 17:59:19,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:59:19,685 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 442 transitions. [2022-07-21 17:59:19,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:59:19,685 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 442 transitions. [2022-07-21 17:59:19,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 17:59:19,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:59:19,686 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:59:19,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-21 17:59:19,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:59:19,887 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:59:19,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:59:19,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1458472979, now seen corresponding path program 1 times [2022-07-21 17:59:19,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:59:19,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618631099] [2022-07-21 17:59:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:59:19,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:59:19,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:59:19,889 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:59:19,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-21 17:59:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:59:20,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 17:59:20,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:59:22,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:59:22,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:59:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 17:59:22,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:59:25,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:59:25,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618631099] [2022-07-21 17:59:25,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618631099] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:59:25,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [636155346] [2022-07-21 17:59:25,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:59:25,405 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:59:25,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:59:25,406 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:59:25,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-21 17:59:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:59:25,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 17:59:25,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:59:28,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:59:28,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:59:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 17:59:28,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:59:30,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [636155346] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:59:30,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:59:30,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-07-21 17:59:30,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842557557] [2022-07-21 17:59:30,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:59:30,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:59:30,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:59:30,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:59:30,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2022-07-21 17:59:30,549 INFO L87 Difference]: Start difference. First operand 352 states and 442 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:59:35,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:59:35,145 INFO L93 Difference]: Finished difference Result 413 states and 485 transitions. [2022-07-21 17:59:35,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:59:35,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-07-21 17:59:35,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:59:35,147 INFO L225 Difference]: With dead ends: 413 [2022-07-21 17:59:35,147 INFO L226 Difference]: Without dead ends: 413 [2022-07-21 17:59:35,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=127, Invalid=289, Unknown=4, NotChecked=0, Total=420 [2022-07-21 17:59:35,148 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 294 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:59:35,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 247 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 132 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-07-21 17:59:35,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-07-21 17:59:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 351. [2022-07-21 17:59:35,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 315 states have (on average 1.3142857142857143) internal successors, (414), 334 states have internal predecessors, (414), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-21 17:59:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 438 transitions. [2022-07-21 17:59:35,155 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 438 transitions. Word has length 48 [2022-07-21 17:59:35,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:59:35,155 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 438 transitions. [2022-07-21 17:59:35,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:59:35,155 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 438 transitions. [2022-07-21 17:59:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 17:59:35,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:59:35,156 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:59:35,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-07-21 17:59:35,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-21 17:59:35,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:59:35,564 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:59:35,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:59:35,564 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2022-07-21 17:59:35,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:59:35,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255247897] [2022-07-21 17:59:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:59:35,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:59:35,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:59:35,584 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:59:35,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-21 17:59:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:59:35,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:59:35,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:59:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 17:59:35,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:59:35,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:59:35,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255247897] [2022-07-21 17:59:35,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255247897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:59:35,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:59:35,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:59:35,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087985260] [2022-07-21 17:59:35,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:59:35,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:59:35,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:59:35,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:59:35,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:59:35,678 INFO L87 Difference]: Start difference. First operand 351 states and 438 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:59:35,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:59:35,682 INFO L93 Difference]: Finished difference Result 296 states and 351 transitions. [2022-07-21 17:59:35,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:59:35,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-07-21 17:59:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:59:35,684 INFO L225 Difference]: With dead ends: 296 [2022-07-21 17:59:35,684 INFO L226 Difference]: Without dead ends: 296 [2022-07-21 17:59:35,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:59:35,685 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 4 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:59:35,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:59:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-21 17:59:35,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 281. [2022-07-21 17:59:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 252 states have (on average 1.253968253968254) internal successors, (316), 266 states have internal predecessors, (316), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-21 17:59:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 336 transitions. [2022-07-21 17:59:35,691 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 336 transitions. Word has length 47 [2022-07-21 17:59:35,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:59:35,692 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 336 transitions. [2022-07-21 17:59:35,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:59:35,692 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 336 transitions. [2022-07-21 17:59:35,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 17:59:35,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:59:35,693 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:59:35,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-21 17:59:35,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:59:35,893 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:59:35,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:59:35,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1433195828, now seen corresponding path program 1 times [2022-07-21 17:59:35,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:59:35,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385255907] [2022-07-21 17:59:35,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:59:35,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:59:35,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:59:35,896 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:59:35,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-21 17:59:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:59:36,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 17:59:36,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:59:38,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:59:38,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:59:39,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:59:39,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:59:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 17:59:39,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:59:41,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:59:41,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385255907] [2022-07-21 17:59:41,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385255907] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:59:41,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1311241703] [2022-07-21 17:59:41,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:59:41,358 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:59:41,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:59:41,359 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:59:41,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-07-21 17:59:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:59:41,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:59:41,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:59:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:59:46,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:59:46,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:59:46,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:59:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 17:59:46,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:59:48,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1311241703] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:59:48,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:59:48,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2022-07-21 17:59:48,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268218798] [2022-07-21 17:59:48,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:59:48,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:59:48,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:59:48,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:59:48,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2022-07-21 17:59:48,905 INFO L87 Difference]: Start difference. First operand 281 states and 336 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:59:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:59:55,707 INFO L93 Difference]: Finished difference Result 326 states and 374 transitions. [2022-07-21 17:59:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:59:55,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-07-21 17:59:55,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:59:55,708 INFO L225 Difference]: With dead ends: 326 [2022-07-21 17:59:55,708 INFO L226 Difference]: Without dead ends: 326 [2022-07-21 17:59:55,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2022-07-21 17:59:55,709 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 126 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:59:55,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 231 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 182 Invalid, 0 Unknown, 54 Unchecked, 0.4s Time] [2022-07-21 17:59:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-21 17:59:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2022-07-21 17:59:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 252 states have (on average 1.25) internal successors, (315), 266 states have internal predecessors, (315), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-21 17:59:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 335 transitions. [2022-07-21 17:59:55,715 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 335 transitions. Word has length 50 [2022-07-21 17:59:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:59:55,715 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 335 transitions. [2022-07-21 17:59:55,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:59:55,715 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 335 transitions. [2022-07-21 17:59:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:59:55,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:59:55,716 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:59:55,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-21 17:59:55,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-07-21 17:59:56,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:59:56,127 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:59:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:59:56,128 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2022-07-21 17:59:56,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:59:56,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314808014] [2022-07-21 17:59:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:59:56,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:59:56,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:59:56,129 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:59:56,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-21 17:59:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:59:56,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:59:56,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:59:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 17:59:56,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:59:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 17:59:56,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:59:56,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314808014] [2022-07-21 17:59:56,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314808014] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:59:56,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:59:56,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-07-21 17:59:56,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681755740] [2022-07-21 17:59:56,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:59:56,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:59:56,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:59:56,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:59:56,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:59:56,750 INFO L87 Difference]: Start difference. First operand 281 states and 335 transitions. Second operand has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 17:59:57,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:59:57,197 INFO L93 Difference]: Finished difference Result 303 states and 345 transitions. [2022-07-21 17:59:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:59:57,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-07-21 17:59:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:59:57,198 INFO L225 Difference]: With dead ends: 303 [2022-07-21 17:59:57,199 INFO L226 Difference]: Without dead ends: 303 [2022-07-21 17:59:57,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:59:57,199 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 221 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:59:57,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 187 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:59:57,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-21 17:59:57,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 281. [2022-07-21 17:59:57,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 252 states have (on average 1.2380952380952381) internal successors, (312), 266 states have internal predecessors, (312), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-21 17:59:57,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 332 transitions. [2022-07-21 17:59:57,205 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 332 transitions. Word has length 51 [2022-07-21 17:59:57,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:59:57,206 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 332 transitions. [2022-07-21 17:59:57,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 17:59:57,206 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 332 transitions. [2022-07-21 17:59:57,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:59:57,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:59:57,207 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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] [2022-07-21 17:59:57,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-21 17:59:57,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:59:57,417 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 17:59:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:59:57,417 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2022-07-21 17:59:57,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:59:57,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904606036] [2022-07-21 17:59:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:59:57,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:59:57,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:59:57,419 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:59:57,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-21 17:59:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:59:57,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:59:57,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:59:57,746 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:59:57,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 18:00:00,371 INFO L356 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2022-07-21 18:00:00,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 36 [2022-07-21 18:00:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 18:00:00,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 18:00:00,545 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 18:00:00,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 108 [2022-07-21 18:00:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 18:00:04,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 18:00:04,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904606036] [2022-07-21 18:00:04,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904606036] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 18:00:04,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 18:00:04,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-07-21 18:00:04,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763355932] [2022-07-21 18:00:04,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 18:00:04,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 18:00:04,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 18:00:04,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 18:00:04,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=303, Unknown=2, NotChecked=0, Total=380 [2022-07-21 18:00:04,344 INFO L87 Difference]: Start difference. First operand 281 states and 332 transitions. Second operand has 20 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 18:00:09,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 18:00:09,306 INFO L93 Difference]: Finished difference Result 314 states and 353 transitions. [2022-07-21 18:00:09,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 18:00:09,307 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2022-07-21 18:00:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 18:00:09,308 INFO L225 Difference]: With dead ends: 314 [2022-07-21 18:00:09,308 INFO L226 Difference]: Without dead ends: 314 [2022-07-21 18:00:09,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=151, Invalid=547, Unknown=4, NotChecked=0, Total=702 [2022-07-21 18:00:09,309 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 213 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 18:00:09,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 418 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 259 Invalid, 0 Unknown, 173 Unchecked, 0.6s Time] [2022-07-21 18:00:09,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-21 18:00:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 288. [2022-07-21 18:00:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 262 states have (on average 1.2061068702290076) internal successors, (316), 273 states have internal predecessors, (316), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-21 18:00:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 335 transitions. [2022-07-21 18:00:09,315 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 335 transitions. Word has length 51 [2022-07-21 18:00:09,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 18:00:09,315 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 335 transitions. [2022-07-21 18:00:09,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 18:00:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 335 transitions. [2022-07-21 18:00:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 18:00:09,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 18:00:09,318 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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] [2022-07-21 18:00:09,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-21 18:00:09,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 18:00:09,530 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 18:00:09,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 18:00:09,530 INFO L85 PathProgramCache]: Analyzing trace with hash -563187968, now seen corresponding path program 1 times [2022-07-21 18:00:09,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 18:00:09,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356510209] [2022-07-21 18:00:09,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 18:00:09,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 18:00:09,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 18:00:09,532 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 18:00:09,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-21 18:00:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 18:00:09,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 18:00:09,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 18:00:12,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 18:00:12,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 18:00:14,458 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 18:00:14,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 18:00:14,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 18:00:14,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 18:00:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 18:00:15,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 18:00:15,433 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 18:00:15,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-07-21 18:00:18,085 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 18:00:18,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-07-21 18:00:22,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 18:00:22,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356510209] [2022-07-21 18:00:22,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356510209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 18:00:22,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [291423841] [2022-07-21 18:00:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 18:00:22,881 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 18:00:22,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 18:00:22,882 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 18:00:22,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-21 18:00:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 18:00:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 18:00:23,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 18:00:25,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 18:00:25,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 18:00:25,734 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 18:00:25,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 18:00:26,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 18:00:26,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 18:00:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 18:00:26,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 18:00:26,417 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 18:00:26,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-07-21 18:00:28,933 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 18:00:28,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-07-21 18:00:33,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [291423841] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 18:00:33,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 18:00:33,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-21 18:00:33,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441967822] [2022-07-21 18:00:33,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 18:00:33,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 18:00:33,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 18:00:33,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 18:00:33,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=155, Unknown=5, NotChecked=0, Total=210 [2022-07-21 18:00:33,508 INFO L87 Difference]: Start difference. First operand 288 states and 335 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 18:00:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 18:00:38,117 INFO L93 Difference]: Finished difference Result 335 states and 377 transitions. [2022-07-21 18:00:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 18:00:38,118 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-07-21 18:00:38,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 18:00:38,119 INFO L225 Difference]: With dead ends: 335 [2022-07-21 18:00:38,119 INFO L226 Difference]: Without dead ends: 335 [2022-07-21 18:00:38,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=122, Invalid=291, Unknown=7, NotChecked=0, Total=420 [2022-07-21 18:00:38,120 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 169 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 18:00:38,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 107 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 85 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-07-21 18:00:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-07-21 18:00:38,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 288. [2022-07-21 18:00:38,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 262 states have (on average 1.1946564885496183) internal successors, (313), 273 states have internal predecessors, (313), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-21 18:00:38,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 332 transitions. [2022-07-21 18:00:38,126 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 332 transitions. Word has length 51 [2022-07-21 18:00:38,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 18:00:38,126 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 332 transitions. [2022-07-21 18:00:38,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 18:00:38,127 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 332 transitions. [2022-07-21 18:00:38,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 18:00:38,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 18:00:38,128 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 18:00:38,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-07-21 18:00:38,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-07-21 18:00:38,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 18:00:38,536 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 18:00:38,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 18:00:38,536 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2022-07-21 18:00:38,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 18:00:38,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192810176] [2022-07-21 18:00:38,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 18:00:38,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 18:00:38,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 18:00:38,537 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 18:00:38,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-21 18:00:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 18:00:38,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 18:00:38,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 18:00:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 18:00:38,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 18:00:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 18:00:39,340 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 18:00:39,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192810176] [2022-07-21 18:00:39,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192810176] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 18:00:39,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 18:00:39,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-21 18:00:39,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511305209] [2022-07-21 18:00:39,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 18:00:39,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 18:00:39,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 18:00:39,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 18:00:39,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-21 18:00:39,341 INFO L87 Difference]: Start difference. First operand 288 states and 332 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 18:00:39,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 18:00:39,954 INFO L93 Difference]: Finished difference Result 299 states and 339 transitions. [2022-07-21 18:00:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 18:00:39,955 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-07-21 18:00:39,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 18:00:39,956 INFO L225 Difference]: With dead ends: 299 [2022-07-21 18:00:39,956 INFO L226 Difference]: Without dead ends: 299 [2022-07-21 18:00:39,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-07-21 18:00:39,956 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 228 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 18:00:39,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 243 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 18:00:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-07-21 18:00:39,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 287. [2022-07-21 18:00:39,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 262 states have (on average 1.1793893129770991) internal successors, (309), 272 states have internal predecessors, (309), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-21 18:00:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 328 transitions. [2022-07-21 18:00:39,962 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 328 transitions. Word has length 52 [2022-07-21 18:00:39,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 18:00:39,962 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 328 transitions. [2022-07-21 18:00:39,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 18:00:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 328 transitions. [2022-07-21 18:00:39,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 18:00:39,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 18:00:39,963 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 18:00:39,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-21 18:00:40,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 18:00:40,171 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 18:00:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 18:00:40,172 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2022-07-21 18:00:40,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 18:00:40,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307472902] [2022-07-21 18:00:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 18:00:40,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 18:00:40,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 18:00:40,173 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 18:00:40,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-21 18:00:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 18:00:40,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 18:00:40,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 18:00:40,677 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 18:00:40,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-21 18:00:43,564 INFO L356 Elim1Store]: treesize reduction 34, result has 49.3 percent of original size [2022-07-21 18:00:43,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 49 [2022-07-21 18:00:43,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 18:00:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 18:00:43,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 18:00:44,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 18:00:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307472902] [2022-07-21 18:00:44,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307472902] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 18:00:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [416398452] [2022-07-21 18:00:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 18:00:44,110 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 18:00:44,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 18:00:44,111 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 18:00:44,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-07-21 18:00:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 18:00:44,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 18:00:44,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 18:00:44,693 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-21 18:00:44,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 39 [2022-07-21 18:00:47,498 INFO L356 Elim1Store]: treesize reduction 49, result has 47.9 percent of original size [2022-07-21 18:00:47,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 66 [2022-07-21 18:00:47,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 18:00:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 18:00:47,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 18:00:48,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [416398452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 18:00:48,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 18:00:48,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2022-07-21 18:00:48,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924594327] [2022-07-21 18:00:48,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 18:00:48,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 18:00:48,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 18:00:48,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 18:00:48,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=471, Unknown=1, NotChecked=0, Total=552 [2022-07-21 18:00:48,492 INFO L87 Difference]: Start difference. First operand 287 states and 328 transitions. Second operand has 20 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 18:00:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 18:00:56,689 INFO L93 Difference]: Finished difference Result 305 states and 339 transitions. [2022-07-21 18:00:56,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 18:00:56,689 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2022-07-21 18:00:56,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 18:00:56,690 INFO L225 Difference]: With dead ends: 305 [2022-07-21 18:00:56,690 INFO L226 Difference]: Without dead ends: 305 [2022-07-21 18:00:56,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=234, Invalid=952, Unknown=4, NotChecked=0, Total=1190 [2022-07-21 18:00:56,691 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 398 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 18:00:56,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 308 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 239 Invalid, 0 Unknown, 172 Unchecked, 0.5s Time] [2022-07-21 18:00:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-07-21 18:00:56,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 287. [2022-07-21 18:00:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 262 states have (on average 1.1755725190839694) internal successors, (308), 272 states have internal predecessors, (308), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-21 18:00:56,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 327 transitions. [2022-07-21 18:00:56,697 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 327 transitions. Word has length 52 [2022-07-21 18:00:56,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 18:00:56,698 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 327 transitions. [2022-07-21 18:00:56,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 18:00:56,698 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 327 transitions. [2022-07-21 18:00:56,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 18:00:56,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 18:00:56,699 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 18:00:56,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-21 18:00:56,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-07-21 18:00:57,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 18:00:57,111 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 18:00:57,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 18:00:57,111 INFO L85 PathProgramCache]: Analyzing trace with hash -57759457, now seen corresponding path program 1 times [2022-07-21 18:00:57,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 18:00:57,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508791642] [2022-07-21 18:00:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 18:00:57,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 18:00:57,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 18:00:57,113 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 18:00:57,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-21 18:00:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 18:00:57,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 18:00:57,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 18:00:57,840 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 18:00:57,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-21 18:00:58,501 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-21 18:00:58,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-21 18:00:58,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 18:00:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 18:00:59,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 18:00:59,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 18:00:59,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 18:00:59,677 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 18:00:59,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 18:00:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 18:00:59,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 18:01:00,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-07-21 18:01:00,377 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-21 18:01:00,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-07-21 18:01:00,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 18:01:00,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508791642] [2022-07-21 18:01:00,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508791642] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 18:01:00,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1508753839] [2022-07-21 18:01:00,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 18:01:00,512 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 18:01:00,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 18:01:00,513 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 18:01:00,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-07-21 18:01:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 18:01:00,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 18:01:00,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 18:01:01,324 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 18:01:01,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-21 18:01:01,761 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-21 18:01:01,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-21 18:01:02,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 18:01:02,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 18:01:02,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 18:01:02,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 18:01:02,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 18:01:02,577 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 18:01:02,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 18:01:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 18:01:02,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 18:01:02,834 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-21 18:01:02,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-07-21 18:01:02,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-07-21 18:01:02,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1508753839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 18:01:02,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 18:01:02,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2022-07-21 18:01:02,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798585258] [2022-07-21 18:01:02,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 18:01:02,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 18:01:02,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 18:01:02,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 18:01:02,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-07-21 18:01:02,964 INFO L87 Difference]: Start difference. First operand 287 states and 327 transitions. Second operand has 18 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 18:01:11,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 18:01:11,945 INFO L93 Difference]: Finished difference Result 398 states and 451 transitions. [2022-07-21 18:01:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 18:01:11,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-07-21 18:01:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 18:01:11,947 INFO L225 Difference]: With dead ends: 398 [2022-07-21 18:01:11,947 INFO L226 Difference]: Without dead ends: 398 [2022-07-21 18:01:11,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=343, Invalid=1137, Unknown=2, NotChecked=0, Total=1482 [2022-07-21 18:01:11,948 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 201 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 18:01:11,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 337 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 150 Invalid, 0 Unknown, 206 Unchecked, 0.4s Time] [2022-07-21 18:01:11,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-07-21 18:01:11,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 344. [2022-07-21 18:01:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 314 states have (on average 1.1624203821656052) internal successors, (365), 325 states have internal predecessors, (365), 9 states have call successors, (9), 9 states have call predecessors, (9), 13 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-21 18:01:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 392 transitions. [2022-07-21 18:01:11,955 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 392 transitions. Word has length 53 [2022-07-21 18:01:11,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 18:01:11,956 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 392 transitions. [2022-07-21 18:01:11,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 18:01:11,956 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 392 transitions. [2022-07-21 18:01:11,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 18:01:11,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 18:01:11,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 18:01:11,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-21 18:01:12,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-07-21 18:01:12,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 18:01:12,368 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-21 18:01:12,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 18:01:12,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2022-07-21 18:01:12,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 18:01:12,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654003405] [2022-07-21 18:01:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 18:01:12,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 18:01:12,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 18:01:12,370 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 18:01:12,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-21 18:01:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 18:01:12,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 18:01:12,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 18:01:12,690 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 18:01:12,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-21 18:01:15,152 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-21 18:01:15,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 41 [2022-07-21 18:01:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 18:01:15,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 18:01:17,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 18:01:17,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654003405] [2022-07-21 18:01:17,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654003405] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 18:01:17,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [698189364] [2022-07-21 18:01:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 18:01:17,530 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 18:01:17,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 18:01:17,531 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 18:01:17,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-07-21 18:01:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 18:01:17,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 18:01:17,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 18:01:22,203 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 18:01:22,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-21 18:01:28,804 INFO L356 Elim1Store]: treesize reduction 18, result has 53.8 percent of original size [2022-07-21 18:01:28,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 31 [2022-07-21 18:01:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 18:01:28,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 18:01:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 18:01:35,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [698189364] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 18:01:35,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 18:01:35,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-07-21 18:01:35,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10736671] [2022-07-21 18:01:35,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 18:01:35,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 18:01:35,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 18:01:35,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 18:01:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=471, Unknown=8, NotChecked=0, Total=600 [2022-07-21 18:01:35,956 INFO L87 Difference]: Start difference. First operand 344 states and 392 transitions. Second operand has 24 states, 21 states have (on average 5.380952380952381) internal successors, (113), 19 states have internal predecessors, (113), 3 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6)