./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-bftpd/bftpd_1.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 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 22:33:36,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 22:33:36,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 22:33:36,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 22:33:36,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 22:33:36,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 22:33:36,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 22:33:36,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 22:33:36,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 22:33:36,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 22:33:36,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 22:33:36,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 22:33:36,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 22:33:36,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 22:33:36,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 22:33:36,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 22:33:36,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 22:33:36,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 22:33:36,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 22:33:36,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 22:33:36,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 22:33:36,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 22:33:36,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 22:33:36,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 22:33:36,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 22:33:36,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 22:33:36,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 22:33:36,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 22:33:36,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 22:33:36,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 22:33:36,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 22:33:36,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 22:33:36,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 22:33:36,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 22:33:36,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 22:33:36,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 22:33:36,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 22:33:36,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 22:33:36,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 22:33:36,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 22:33:36,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 22:33:36,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 22:33:36,217 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 22:33:36,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 22:33:36,217 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 22:33:36,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 22:33:36,218 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 22:33:36,218 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 22:33:36,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 22:33:36,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 22:33:36,219 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 22:33:36,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 22:33:36,219 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 22:33:36,220 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 22:33:36,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 22:33:36,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 22:33:36,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 22:33:36,220 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 22:33:36,220 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 22:33:36,221 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 22:33:36,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 22:33:36,221 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 22:33:36,221 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 22:33:36,221 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 22:33:36,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 22:33:36,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 22:33:36,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 22:33:36,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 22:33:36,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 22:33:36,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 22:33:36,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 22:33:36,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 22:33:36,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 22:33:36,223 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2021-12-18 22:33:36,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 22:33:36,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 22:33:36,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 22:33:36,441 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 22:33:36,441 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 22:33:36,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-12-18 22:33:36,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abaf68ee/93f72f1739384cce99396c98940e6e4b/FLAG32b218058 [2021-12-18 22:33:36,854 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 22:33:36,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-12-18 22:33:36,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abaf68ee/93f72f1739384cce99396c98940e6e4b/FLAG32b218058 [2021-12-18 22:33:37,242 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abaf68ee/93f72f1739384cce99396c98940e6e4b [2021-12-18 22:33:37,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 22:33:37,246 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 22:33:37,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 22:33:37,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 22:33:37,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 22:33:37,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 10:33:37" (1/1) ... [2021-12-18 22:33:37,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6479e36c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:33:37, skipping insertion in model container [2021-12-18 22:33:37,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 10:33:37" (1/1) ... [2021-12-18 22:33:37,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 22:33:37,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 22:33:37,558 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 22:33:37,565 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 22:33:37,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 22:33:37,633 INFO L208 MainTranslator]: Completed translation [2021-12-18 22:33:37,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:33:37 WrapperNode [2021-12-18 22:33:37,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 22:33:37,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 22:33:37,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 22:33:37,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 22:33:37,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:33:37" (1/1) ... [2021-12-18 22:33:37,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:33:37" (1/1) ... [2021-12-18 22:33:37,678 INFO L137 Inliner]: procedures = 168, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 99 [2021-12-18 22:33:37,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 22:33:37,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 22:33:37,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 22:33:37,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 22:33:37,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:33:37" (1/1) ... [2021-12-18 22:33:37,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:33:37" (1/1) ... [2021-12-18 22:33:37,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:33:37" (1/1) ... [2021-12-18 22:33:37,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:33:37" (1/1) ... [2021-12-18 22:33:37,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:33:37" (1/1) ... [2021-12-18 22:33:37,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:33:37" (1/1) ... [2021-12-18 22:33:37,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:33:37" (1/1) ... [2021-12-18 22:33:37,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 22:33:37,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 22:33:37,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 22:33:37,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 22:33:37,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:33:37" (1/1) ... [2021-12-18 22:33:37,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 22:33:37,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:37,746 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 22:33:37,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 22:33:37,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 22:33:37,773 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-12-18 22:33:37,773 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-12-18 22:33:37,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 22:33:37,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 22:33:37,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 22:33:37,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 22:33:37,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 22:33:37,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 22:33:37,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 22:33:37,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 22:33:37,842 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 22:33:37,843 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 22:33:38,042 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 22:33:38,046 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 22:33:38,047 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-18 22:33:38,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 10:33:38 BoogieIcfgContainer [2021-12-18 22:33:38,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 22:33:38,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 22:33:38,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 22:33:38,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 22:33:38,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 10:33:37" (1/3) ... [2021-12-18 22:33:38,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d362db4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 10:33:38, skipping insertion in model container [2021-12-18 22:33:38,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:33:37" (2/3) ... [2021-12-18 22:33:38,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d362db4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 10:33:38, skipping insertion in model container [2021-12-18 22:33:38,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 10:33:38" (3/3) ... [2021-12-18 22:33:38,077 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2021-12-18 22:33:38,082 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 22:33:38,082 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-12-18 22:33:38,121 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 22:33:38,126 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 22:33:38,126 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-12-18 22:33:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 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) [2021-12-18 22:33:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 22:33:38,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:38,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 22:33:38,141 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:38,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:38,144 INFO L85 PathProgramCache]: Analyzing trace with hash -594954629, now seen corresponding path program 1 times [2021-12-18 22:33:38,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:38,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233754825] [2021-12-18 22:33:38,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:38,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:38,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:38,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233754825] [2021-12-18 22:33:38,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233754825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:33:38,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:33:38,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 22:33:38,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032896944] [2021-12-18 22:33:38,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:33:38,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 22:33:38,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:38,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 22:33:38,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 22:33:38,388 INFO L87 Difference]: Start difference. First operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 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) [2021-12-18 22:33:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:38,524 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2021-12-18 22:33:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 22:33:38,527 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 [2021-12-18 22:33:38,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:38,536 INFO L225 Difference]: With dead ends: 134 [2021-12-18 22:33:38,536 INFO L226 Difference]: Without dead ends: 128 [2021-12-18 22:33:38,537 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:33:38,539 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 114 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:38,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 130 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:33:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-18 22:33:38,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2021-12-18 22:33:38,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 65 states have (on average 1.646153846153846) internal successors, (107), 85 states have internal predecessors, (107), 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) [2021-12-18 22:33:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 125 transitions. [2021-12-18 22:33:38,572 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 125 transitions. Word has length 6 [2021-12-18 22:33:38,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:38,573 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 125 transitions. [2021-12-18 22:33:38,573 INFO L471 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) [2021-12-18 22:33:38,573 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 125 transitions. [2021-12-18 22:33:38,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 22:33:38,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:38,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 22:33:38,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 22:33:38,574 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:38,575 INFO L85 PathProgramCache]: Analyzing trace with hash -594954628, now seen corresponding path program 1 times [2021-12-18 22:33:38,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:38,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659697482] [2021-12-18 22:33:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:38,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:38,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:38,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659697482] [2021-12-18 22:33:38,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659697482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:33:38,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:33:38,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:33:38,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819980297] [2021-12-18 22:33:38,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:33:38,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:33:38,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:38,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:33:38,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:33:38,666 INFO L87 Difference]: Start difference. First operand 95 states and 125 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) [2021-12-18 22:33:38,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:38,790 INFO L93 Difference]: Finished difference Result 222 states and 302 transitions. [2021-12-18 22:33:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 22:33:38,791 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 [2021-12-18 22:33:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:38,795 INFO L225 Difference]: With dead ends: 222 [2021-12-18 22:33:38,796 INFO L226 Difference]: Without dead ends: 222 [2021-12-18 22:33:38,796 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:33:38,800 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 138 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:38,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 212 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:33:38,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-18 22:33:38,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 169. [2021-12-18 22:33:38,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 131 states have (on average 1.6641221374045803) internal successors, (218), 151 states have internal predecessors, (218), 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) [2021-12-18 22:33:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 263 transitions. [2021-12-18 22:33:38,820 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 263 transitions. Word has length 6 [2021-12-18 22:33:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:38,820 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 263 transitions. [2021-12-18 22:33:38,820 INFO L471 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) [2021-12-18 22:33:38,821 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 263 transitions. [2021-12-18 22:33:38,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 22:33:38,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:38,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:33:38,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 22:33:38,821 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:38,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1263724334, now seen corresponding path program 1 times [2021-12-18 22:33:38,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:38,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178880509] [2021-12-18 22:33:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:38,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:38,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:38,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178880509] [2021-12-18 22:33:38,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178880509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:33:38,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:33:38,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:33:38,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971011494] [2021-12-18 22:33:38,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:33:38,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:33:38,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:38,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:33:38,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:33:38,947 INFO L87 Difference]: Start difference. First operand 169 states and 263 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) [2021-12-18 22:33:39,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:39,072 INFO L93 Difference]: Finished difference Result 260 states and 371 transitions. [2021-12-18 22:33:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:33:39,072 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 [2021-12-18 22:33:39,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:39,074 INFO L225 Difference]: With dead ends: 260 [2021-12-18 22:33:39,075 INFO L226 Difference]: Without dead ends: 260 [2021-12-18 22:33:39,075 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:33:39,076 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 108 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:39,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 189 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:33:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-18 22:33:39,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 172. [2021-12-18 22:33:39,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 134 states have (on average 1.6492537313432836) internal successors, (221), 154 states have internal predecessors, (221), 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) [2021-12-18 22:33:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 266 transitions. [2021-12-18 22:33:39,088 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 266 transitions. Word has length 7 [2021-12-18 22:33:39,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:39,088 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 266 transitions. [2021-12-18 22:33:39,089 INFO L471 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) [2021-12-18 22:33:39,089 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 266 transitions. [2021-12-18 22:33:39,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 22:33:39,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:39,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:33:39,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 22:33:39,090 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:39,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:39,090 INFO L85 PathProgramCache]: Analyzing trace with hash -520748645, now seen corresponding path program 1 times [2021-12-18 22:33:39,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:39,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587802275] [2021-12-18 22:33:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:39,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:39,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:39,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587802275] [2021-12-18 22:33:39,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587802275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:33:39,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:33:39,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:33:39,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914083248] [2021-12-18 22:33:39,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:33:39,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:33:39,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:39,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:33:39,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:33:39,247 INFO L87 Difference]: Start difference. First operand 172 states and 266 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) [2021-12-18 22:33:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:39,346 INFO L93 Difference]: Finished difference Result 224 states and 303 transitions. [2021-12-18 22:33:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:33:39,347 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 [2021-12-18 22:33:39,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:39,349 INFO L225 Difference]: With dead ends: 224 [2021-12-18 22:33:39,350 INFO L226 Difference]: Without dead ends: 224 [2021-12-18 22:33:39,350 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:33:39,358 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 139 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:39,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 208 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:33:39,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-18 22:33:39,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 172. [2021-12-18 22:33:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 134 states have (on average 1.6343283582089552) internal successors, (219), 154 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) [2021-12-18 22:33:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 264 transitions. [2021-12-18 22:33:39,380 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 264 transitions. Word has length 8 [2021-12-18 22:33:39,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:39,381 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 264 transitions. [2021-12-18 22:33:39,381 INFO L471 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) [2021-12-18 22:33:39,381 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 264 transitions. [2021-12-18 22:33:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 22:33:39,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:39,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:33:39,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 22:33:39,382 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:39,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:39,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1036661236, now seen corresponding path program 1 times [2021-12-18 22:33:39,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:39,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407729633] [2021-12-18 22:33:39,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:39,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:39,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:39,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407729633] [2021-12-18 22:33:39,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407729633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:33:39,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:33:39,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:33:39,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192389109] [2021-12-18 22:33:39,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:33:39,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:33:39,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:39,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:33:39,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:33:39,430 INFO L87 Difference]: Start difference. First operand 172 states and 264 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) [2021-12-18 22:33:39,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:39,503 INFO L93 Difference]: Finished difference Result 266 states and 366 transitions. [2021-12-18 22:33:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:33:39,504 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 [2021-12-18 22:33:39,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:39,505 INFO L225 Difference]: With dead ends: 266 [2021-12-18 22:33:39,505 INFO L226 Difference]: Without dead ends: 266 [2021-12-18 22:33:39,506 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:33:39,506 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 147 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:39,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 207 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:33:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-18 22:33:39,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 205. [2021-12-18 22:33:39,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 165 states have (on average 1.606060606060606) internal successors, (265), 186 states have internal predecessors, (265), 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) [2021-12-18 22:33:39,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 310 transitions. [2021-12-18 22:33:39,515 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 310 transitions. Word has length 9 [2021-12-18 22:33:39,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:39,515 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 310 transitions. [2021-12-18 22:33:39,515 INFO L471 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) [2021-12-18 22:33:39,516 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 310 transitions. [2021-12-18 22:33:39,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 22:33:39,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:39,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:33:39,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 22:33:39,516 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:39,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:39,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2071727293, now seen corresponding path program 1 times [2021-12-18 22:33:39,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:39,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293431044] [2021-12-18 22:33:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:39,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:39,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:39,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293431044] [2021-12-18 22:33:39,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293431044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:33:39,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:33:39,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:33:39,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86373452] [2021-12-18 22:33:39,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:33:39,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:33:39,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:39,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:33:39,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:33:39,559 INFO L87 Difference]: Start difference. First operand 205 states and 310 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) [2021-12-18 22:33:39,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:39,634 INFO L93 Difference]: Finished difference Result 253 states and 333 transitions. [2021-12-18 22:33:39,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:33:39,634 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 [2021-12-18 22:33:39,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:39,635 INFO L225 Difference]: With dead ends: 253 [2021-12-18 22:33:39,635 INFO L226 Difference]: Without dead ends: 253 [2021-12-18 22:33:39,635 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:33:39,636 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 139 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:39,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 235 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:33:39,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-18 22:33:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 219. [2021-12-18 22:33:39,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 178 states have (on average 1.6067415730337078) internal successors, (286), 200 states have internal predecessors, (286), 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) [2021-12-18 22:33:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 331 transitions. [2021-12-18 22:33:39,643 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 331 transitions. Word has length 10 [2021-12-18 22:33:39,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:39,643 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 331 transitions. [2021-12-18 22:33:39,643 INFO L471 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) [2021-12-18 22:33:39,643 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 331 transitions. [2021-12-18 22:33:39,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 22:33:39,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:39,644 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:33:39,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 22:33:39,644 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:39,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:39,644 INFO L85 PathProgramCache]: Analyzing trace with hash 288674115, now seen corresponding path program 1 times [2021-12-18 22:33:39,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:39,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639218943] [2021-12-18 22:33:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:39,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:39,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:39,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639218943] [2021-12-18 22:33:39,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639218943] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:39,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407432193] [2021-12-18 22:33:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:39,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:39,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:39,720 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:33:39,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 22:33:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:39,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 22:33:39,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:39,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:33:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:40,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407432193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:33:40,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:33:40,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2021-12-18 22:33:40,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481154311] [2021-12-18 22:33:40,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:33:40,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 22:33:40,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:40,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 22:33:40,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-18 22:33:40,083 INFO L87 Difference]: Start difference. First operand 219 states and 331 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) [2021-12-18 22:33:40,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:40,281 INFO L93 Difference]: Finished difference Result 291 states and 398 transitions. [2021-12-18 22:33:40,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 22:33:40,282 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 [2021-12-18 22:33:40,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:40,283 INFO L225 Difference]: With dead ends: 291 [2021-12-18 22:33:40,284 INFO L226 Difference]: Without dead ends: 291 [2021-12-18 22:33:40,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-18 22:33:40,284 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 469 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:40,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 489 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:33:40,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-18 22:33:40,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 225. [2021-12-18 22:33:40,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 183 states have (on average 1.540983606557377) internal successors, (282), 206 states have internal predecessors, (282), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2021-12-18 22:33:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 332 transitions. [2021-12-18 22:33:40,291 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 332 transitions. Word has length 14 [2021-12-18 22:33:40,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:40,292 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 332 transitions. [2021-12-18 22:33:40,292 INFO L471 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) [2021-12-18 22:33:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 332 transitions. [2021-12-18 22:33:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 22:33:40,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:40,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:33:40,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 22:33:40,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:40,510 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:40,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:40,511 INFO L85 PathProgramCache]: Analyzing trace with hash 358962923, now seen corresponding path program 1 times [2021-12-18 22:33:40,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:40,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703328249] [2021-12-18 22:33:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:40,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:40,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:40,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703328249] [2021-12-18 22:33:40,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703328249] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:40,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638583125] [2021-12-18 22:33:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:40,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:40,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:40,612 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:33:40,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 22:33:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:40,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 22:33:40,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:40,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 22:33:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:40,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:33:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:40,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638583125] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:33:40,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:33:40,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-18 22:33:40,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605623652] [2021-12-18 22:33:40,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:33:40,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 22:33:40,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 22:33:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-18 22:33:40,843 INFO L87 Difference]: Start difference. First operand 225 states and 332 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) [2021-12-18 22:33:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:41,086 INFO L93 Difference]: Finished difference Result 336 states and 471 transitions. [2021-12-18 22:33:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 22:33:41,086 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 [2021-12-18 22:33:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:41,090 INFO L225 Difference]: With dead ends: 336 [2021-12-18 22:33:41,091 INFO L226 Difference]: Without dead ends: 336 [2021-12-18 22:33:41,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-18 22:33:41,092 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 428 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:41,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 317 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 22:33:41,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-18 22:33:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 239. [2021-12-18 22:33:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 194 states have (on average 1.5257731958762886) internal successors, (296), 220 states have internal predecessors, (296), 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) [2021-12-18 22:33:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 353 transitions. [2021-12-18 22:33:41,106 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 353 transitions. Word has length 15 [2021-12-18 22:33:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:41,110 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 353 transitions. [2021-12-18 22:33:41,110 INFO L471 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) [2021-12-18 22:33:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 353 transitions. [2021-12-18 22:33:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 22:33:41,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:41,111 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:33:41,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 22:33:41,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-18 22:33:41,320 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:41,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:41,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1757051230, now seen corresponding path program 1 times [2021-12-18 22:33:41,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:41,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094893704] [2021-12-18 22:33:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:41,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:41,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:41,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094893704] [2021-12-18 22:33:41,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094893704] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:41,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005183920] [2021-12-18 22:33:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:41,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:41,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:41,436 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:33:41,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 22:33:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:41,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 22:33:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:41,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 22:33:41,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 22:33:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:41,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:33:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:41,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005183920] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:33:41,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:33:41,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2021-12-18 22:33:41,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960635146] [2021-12-18 22:33:41,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:33:41,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 22:33:41,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:41,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 22:33:41,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-18 22:33:41,752 INFO L87 Difference]: Start difference. First operand 239 states and 353 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) [2021-12-18 22:33:42,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:42,243 INFO L93 Difference]: Finished difference Result 550 states and 739 transitions. [2021-12-18 22:33:42,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 22:33:42,243 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 [2021-12-18 22:33:42,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:42,245 INFO L225 Difference]: With dead ends: 550 [2021-12-18 22:33:42,245 INFO L226 Difference]: Without dead ends: 550 [2021-12-18 22:33:42,246 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:33:42,246 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 433 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:42,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 1026 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 22:33:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-12-18 22:33:42,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 345. [2021-12-18 22:33:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 289 states have (on average 1.5536332179930796) internal successors, (449), 320 states have internal predecessors, (449), 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) [2021-12-18 22:33:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 523 transitions. [2021-12-18 22:33:42,256 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 523 transitions. Word has length 16 [2021-12-18 22:33:42,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:42,256 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 523 transitions. [2021-12-18 22:33:42,257 INFO L471 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) [2021-12-18 22:33:42,257 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 523 transitions. [2021-12-18 22:33:42,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 22:33:42,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:42,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:33:42,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 22:33:42,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:42,469 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:42,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:42,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986564, now seen corresponding path program 1 times [2021-12-18 22:33:42,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:42,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780458277] [2021-12-18 22:33:42,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:42,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:42,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:42,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780458277] [2021-12-18 22:33:42,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780458277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:33:42,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:33:42,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-18 22:33:42,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544735917] [2021-12-18 22:33:42,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:33:42,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:33:42,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:42,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:33:42,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:33:42,490 INFO L87 Difference]: Start difference. First operand 345 states and 523 transitions. Second operand has 3 states, 2 states have (on average 8.5) 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) [2021-12-18 22:33:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:42,507 INFO L93 Difference]: Finished difference Result 495 states and 752 transitions. [2021-12-18 22:33:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:33:42,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) 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 [2021-12-18 22:33:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:42,510 INFO L225 Difference]: With dead ends: 495 [2021-12-18 22:33:42,510 INFO L226 Difference]: Without dead ends: 495 [2021-12-18 22:33:42,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:33:42,511 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 52 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:42,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 117 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:33:42,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-12-18 22:33:42,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 479. [2021-12-18 22:33:42,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 409 states have (on average 1.5574572127139363) internal successors, (637), 445 states have internal predecessors, (637), 19 states have call successors, (19), 14 states have call predecessors, (19), 30 states have return successors, (91), 19 states have call predecessors, (91), 19 states have call successors, (91) [2021-12-18 22:33:42,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 747 transitions. [2021-12-18 22:33:42,525 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 747 transitions. Word has length 18 [2021-12-18 22:33:42,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:42,525 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 747 transitions. [2021-12-18 22:33:42,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) 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) [2021-12-18 22:33:42,525 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 747 transitions. [2021-12-18 22:33:42,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 22:33:42,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:42,526 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:33:42,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-18 22:33:42,526 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:42,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:42,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986820, now seen corresponding path program 1 times [2021-12-18 22:33:42,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:42,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968484417] [2021-12-18 22:33:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:42,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:42,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:42,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968484417] [2021-12-18 22:33:42,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968484417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:33:42,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:33:42,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:33:42,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594892624] [2021-12-18 22:33:42,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:33:42,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:33:42,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:42,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:33:42,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:33:42,553 INFO L87 Difference]: Start difference. First operand 479 states and 747 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2021-12-18 22:33:42,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:42,557 INFO L93 Difference]: Finished difference Result 441 states and 681 transitions. [2021-12-18 22:33:42,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:33:42,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 [2021-12-18 22:33:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:42,560 INFO L225 Difference]: With dead ends: 441 [2021-12-18 22:33:42,560 INFO L226 Difference]: Without dead ends: 441 [2021-12-18 22:33:42,560 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:33:42,561 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 10 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 114 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 [2021-12-18 22:33:42,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 114 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:33:42,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-12-18 22:33:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2021-12-18 22:33:42,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 377 states have (on average 1.5145888594164456) internal successors, (571), 407 states have internal predecessors, (571), 19 states have call successors, (19), 14 states have call predecessors, (19), 30 states have return successors, (91), 19 states have call predecessors, (91), 19 states have call successors, (91) [2021-12-18 22:33:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 681 transitions. [2021-12-18 22:33:42,575 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 681 transitions. Word has length 18 [2021-12-18 22:33:42,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:42,575 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 681 transitions. [2021-12-18 22:33:42,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2021-12-18 22:33:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 681 transitions. [2021-12-18 22:33:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 22:33:42,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:42,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:33:42,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 22:33:42,577 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:42,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:42,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2137943300, now seen corresponding path program 1 times [2021-12-18 22:33:42,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:42,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492491681] [2021-12-18 22:33:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:42,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:42,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:42,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492491681] [2021-12-18 22:33:42,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492491681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:33:42,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:33:42,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-18 22:33:42,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851064043] [2021-12-18 22:33:42,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:33:42,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:33:42,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:42,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:33:42,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:33:42,607 INFO L87 Difference]: Start difference. First operand 441 states and 681 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-12-18 22:33:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:42,629 INFO L93 Difference]: Finished difference Result 509 states and 761 transitions. [2021-12-18 22:33:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:33:42,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 19 [2021-12-18 22:33:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:42,632 INFO L225 Difference]: With dead ends: 509 [2021-12-18 22:33:42,632 INFO L226 Difference]: Without dead ends: 509 [2021-12-18 22:33:42,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:33:42,633 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 33 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:42,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 96 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:33:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-12-18 22:33:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 491. [2021-12-18 22:33:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 424 states have (on average 1.5047169811320755) internal successors, (638), 455 states have internal predecessors, (638), 20 states have call successors, (20), 15 states have call predecessors, (20), 32 states have return successors, (94), 20 states have call predecessors, (94), 20 states have call successors, (94) [2021-12-18 22:33:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 752 transitions. [2021-12-18 22:33:42,646 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 752 transitions. Word has length 19 [2021-12-18 22:33:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:42,647 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 752 transitions. [2021-12-18 22:33:42,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-12-18 22:33:42,647 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 752 transitions. [2021-12-18 22:33:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 22:33:42,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:42,648 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:33:42,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-18 22:33:42,648 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:42,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:42,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1078444150, now seen corresponding path program 1 times [2021-12-18 22:33:42,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:42,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884723192] [2021-12-18 22:33:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:42,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:42,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:42,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:42,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884723192] [2021-12-18 22:33:42,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884723192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:33:42,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:33:42,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 22:33:42,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600623714] [2021-12-18 22:33:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:33:42,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 22:33:42,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:42,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 22:33:42,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 22:33:42,693 INFO L87 Difference]: Start difference. First operand 491 states and 752 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) [2021-12-18 22:33:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:42,736 INFO L93 Difference]: Finished difference Result 351 states and 521 transitions. [2021-12-18 22:33:42,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 22:33:42,737 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 [2021-12-18 22:33:42,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:42,738 INFO L225 Difference]: With dead ends: 351 [2021-12-18 22:33:42,738 INFO L226 Difference]: Without dead ends: 351 [2021-12-18 22:33:42,739 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:33:42,739 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 45 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 66 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 [2021-12-18 22:33:42,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 66 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:33:42,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-12-18 22:33:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2021-12-18 22:33:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 299 states have (on average 1.4782608695652173) internal successors, (442), 324 states have internal predecessors, (442), 15 states have call successors, (15), 11 states have call predecessors, (15), 22 states have return successors, (64), 15 states have call predecessors, (64), 15 states have call successors, (64) [2021-12-18 22:33:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 521 transitions. [2021-12-18 22:33:42,750 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 521 transitions. Word has length 25 [2021-12-18 22:33:42,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:42,750 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 521 transitions. [2021-12-18 22:33:42,750 INFO L471 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) [2021-12-18 22:33:42,750 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 521 transitions. [2021-12-18 22:33:42,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 22:33:42,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:42,751 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:33:42,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-18 22:33:42,751 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:42,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:42,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1446375410, now seen corresponding path program 1 times [2021-12-18 22:33:42,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:42,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848165991] [2021-12-18 22:33:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:42,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:42,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:42,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:42,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848165991] [2021-12-18 22:33:42,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848165991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:42,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702355579] [2021-12-18 22:33:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:42,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:42,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:42,872 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:33:42,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 22:33:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:42,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 22:33:42,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:43,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:33:43,172 INFO L388 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 [2021-12-18 22:33:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:43,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:33:43,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702355579] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:43,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:33:43,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2021-12-18 22:33:43,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230319560] [2021-12-18 22:33:43,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:33:43,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 22:33:43,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:43,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 22:33:43,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-12-18 22:33:43,344 INFO L87 Difference]: Start difference. First operand 351 states and 521 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) [2021-12-18 22:33:43,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:43,927 INFO L93 Difference]: Finished difference Result 531 states and 739 transitions. [2021-12-18 22:33:43,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 22:33:43,927 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 [2021-12-18 22:33:43,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:43,930 INFO L225 Difference]: With dead ends: 531 [2021-12-18 22:33:43,930 INFO L226 Difference]: Without dead ends: 531 [2021-12-18 22:33:43,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2021-12-18 22:33:43,930 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 498 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:43,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 281 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 376 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2021-12-18 22:33:43,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-18 22:33:43,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 452. [2021-12-18 22:33:43,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 391 states have (on average 1.4757033248081841) internal successors, (577), 420 states have internal predecessors, (577), 17 states have call successors, (17), 14 states have call predecessors, (17), 29 states have return successors, (72), 17 states have call predecessors, (72), 17 states have call successors, (72) [2021-12-18 22:33:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 666 transitions. [2021-12-18 22:33:43,941 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 666 transitions. Word has length 27 [2021-12-18 22:33:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:43,941 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 666 transitions. [2021-12-18 22:33:43,941 INFO L471 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) [2021-12-18 22:33:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 666 transitions. [2021-12-18 22:33:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 22:33:43,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:43,942 INFO L514 BasicCegarLoop]: 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, 1] [2021-12-18 22:33:43,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 22:33:44,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:44,155 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:44,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:44,156 INFO L85 PathProgramCache]: Analyzing trace with hash 308487171, now seen corresponding path program 1 times [2021-12-18 22:33:44,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:44,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899155032] [2021-12-18 22:33:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:44,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:44,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:44,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:44,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:44,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899155032] [2021-12-18 22:33:44,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899155032] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:44,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628647301] [2021-12-18 22:33:44,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:44,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:44,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:44,267 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:33:44,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 22:33:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:44,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 22:33:44,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:44,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:33:44,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628647301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:33:44,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 22:33:44,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2021-12-18 22:33:44,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792668873] [2021-12-18 22:33:44,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:33:44,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 22:33:44,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:44,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 22:33:44,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-18 22:33:44,441 INFO L87 Difference]: Start difference. First operand 452 states and 666 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) [2021-12-18 22:33:44,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:44,525 INFO L93 Difference]: Finished difference Result 566 states and 816 transitions. [2021-12-18 22:33:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 22:33:44,525 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 [2021-12-18 22:33:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:44,528 INFO L225 Difference]: With dead ends: 566 [2021-12-18 22:33:44,528 INFO L226 Difference]: Without dead ends: 566 [2021-12-18 22:33:44,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-12-18 22:33:44,530 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 138 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:44,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 164 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:33:44,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-12-18 22:33:44,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 473. [2021-12-18 22:33:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 416 states have (on average 1.4615384615384615) internal successors, (608), 441 states have internal predecessors, (608), 17 states have call successors, (17), 14 states have call predecessors, (17), 25 states have return successors, (68), 17 states have call predecessors, (68), 17 states have call successors, (68) [2021-12-18 22:33:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 693 transitions. [2021-12-18 22:33:44,544 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 693 transitions. Word has length 28 [2021-12-18 22:33:44,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:44,544 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 693 transitions. [2021-12-18 22:33:44,544 INFO L471 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) [2021-12-18 22:33:44,544 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 693 transitions. [2021-12-18 22:33:44,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 22:33:44,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:44,546 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:33:44,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 22:33:44,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-18 22:33:44,764 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:44,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:44,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1602633389, now seen corresponding path program 1 times [2021-12-18 22:33:44,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:44,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919068150] [2021-12-18 22:33:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:44,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:44,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:45,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:45,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919068150] [2021-12-18 22:33:45,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919068150] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:45,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17573551] [2021-12-18 22:33:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:45,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:45,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:45,046 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:33:45,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 22:33:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:45,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 22:33:45,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:45,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:33:45,427 INFO L388 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 [2021-12-18 22:33:45,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:33:45,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:33:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:45,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:33:45,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17573551] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:45,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:33:45,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2021-12-18 22:33:45,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146339444] [2021-12-18 22:33:45,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:33:45,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-18 22:33:45,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:45,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-18 22:33:45,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-12-18 22:33:45,647 INFO L87 Difference]: Start difference. First operand 473 states and 693 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) [2021-12-18 22:33:47,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:47,029 INFO L93 Difference]: Finished difference Result 798 states and 1074 transitions. [2021-12-18 22:33:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 22:33:47,030 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 [2021-12-18 22:33:47,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:47,036 INFO L225 Difference]: With dead ends: 798 [2021-12-18 22:33:47,036 INFO L226 Difference]: Without dead ends: 798 [2021-12-18 22:33:47,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=542, Invalid=2110, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 22:33:47,037 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 966 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:47,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 366 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 719 Invalid, 0 Unknown, 227 Unchecked, 0.5s Time] [2021-12-18 22:33:47,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-12-18 22:33:47,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 628. [2021-12-18 22:33:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 562 states have (on average 1.4750889679715302) internal successors, (829), 590 states have internal predecessors, (829), 20 states have call successors, (20), 17 states have call predecessors, (20), 31 states have return successors, (79), 20 states have call predecessors, (79), 20 states have call successors, (79) [2021-12-18 22:33:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 928 transitions. [2021-12-18 22:33:47,059 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 928 transitions. Word has length 29 [2021-12-18 22:33:47,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:47,059 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 928 transitions. [2021-12-18 22:33:47,059 INFO L471 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) [2021-12-18 22:33:47,060 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 928 transitions. [2021-12-18 22:33:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 22:33:47,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:47,062 INFO L514 BasicCegarLoop]: 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, 1, 1, 1] [2021-12-18 22:33:47,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 22:33:47,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-18 22:33:47,276 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:47,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1182683565, now seen corresponding path program 1 times [2021-12-18 22:33:47,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:47,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581877135] [2021-12-18 22:33:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:47,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:47,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:47,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:47,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581877135] [2021-12-18 22:33:47,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581877135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:33:47,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:33:47,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 22:33:47,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99993926] [2021-12-18 22:33:47,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:33:47,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 22:33:47,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:47,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 22:33:47,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 22:33:47,332 INFO L87 Difference]: Start difference. First operand 628 states and 928 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-12-18 22:33:47,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:47,470 INFO L93 Difference]: Finished difference Result 535 states and 758 transitions. [2021-12-18 22:33:47,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 22:33:47,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 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 30 [2021-12-18 22:33:47,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:47,472 INFO L225 Difference]: With dead ends: 535 [2021-12-18 22:33:47,472 INFO L226 Difference]: Without dead ends: 534 [2021-12-18 22:33:47,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-12-18 22:33:47,473 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 118 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:47,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 128 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:33:47,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-12-18 22:33:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 517. [2021-12-18 22:33:47,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 461 states have (on average 1.4598698481561823) internal successors, (673), 489 states have internal predecessors, (673), 15 states have call successors, (15), 12 states have call predecessors, (15), 26 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) [2021-12-18 22:33:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 742 transitions. [2021-12-18 22:33:47,483 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 742 transitions. Word has length 30 [2021-12-18 22:33:47,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:47,483 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 742 transitions. [2021-12-18 22:33:47,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-12-18 22:33:47,484 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 742 transitions. [2021-12-18 22:33:47,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 22:33:47,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:47,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:33:47,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-18 22:33:47,484 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:47,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1857972446, now seen corresponding path program 1 times [2021-12-18 22:33:47,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:47,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465740054] [2021-12-18 22:33:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:47,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:47,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:47,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:47,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465740054] [2021-12-18 22:33:47,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465740054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:47,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872429672] [2021-12-18 22:33:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:47,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:47,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:47,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:33:47,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 22:33:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:47,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 22:33:47,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:47,756 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 22:33:47,756 INFO L388 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 [2021-12-18 22:33:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:47,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:33:47,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872429672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:47,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:33:47,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-12-18 22:33:47,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490551022] [2021-12-18 22:33:47,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:33:47,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 22:33:47,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 22:33:47,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-18 22:33:47,875 INFO L87 Difference]: Start difference. First operand 517 states and 742 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 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) [2021-12-18 22:33:48,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:48,141 INFO L93 Difference]: Finished difference Result 630 states and 848 transitions. [2021-12-18 22:33:48,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 22:33:48,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 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 30 [2021-12-18 22:33:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:48,144 INFO L225 Difference]: With dead ends: 630 [2021-12-18 22:33:48,144 INFO L226 Difference]: Without dead ends: 630 [2021-12-18 22:33:48,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-12-18 22:33:48,144 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 297 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:48,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 168 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 279 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2021-12-18 22:33:48,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-12-18 22:33:48,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 568. [2021-12-18 22:33:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 510 states have (on average 1.4313725490196079) internal successors, (730), 538 states have internal predecessors, (730), 15 states have call successors, (15), 14 states have call predecessors, (15), 28 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) [2021-12-18 22:33:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 799 transitions. [2021-12-18 22:33:48,161 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 799 transitions. Word has length 30 [2021-12-18 22:33:48,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:48,162 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 799 transitions. [2021-12-18 22:33:48,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 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) [2021-12-18 22:33:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 799 transitions. [2021-12-18 22:33:48,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 22:33:48,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:48,163 INFO L514 BasicCegarLoop]: 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, 1, 1] [2021-12-18 22:33:48,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 22:33:48,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:48,375 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:48,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:48,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1762570929, now seen corresponding path program 1 times [2021-12-18 22:33:48,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:48,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582968725] [2021-12-18 22:33:48,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:48,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:48,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:48,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:48,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582968725] [2021-12-18 22:33:48,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582968725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:48,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548481042] [2021-12-18 22:33:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:48,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:48,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:48,484 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:33:48,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 22:33:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:48,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 22:33:48,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:48,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:33:48,661 INFO L388 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 [2021-12-18 22:33:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:48,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:33:48,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548481042] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:48,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:33:48,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2021-12-18 22:33:48,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038697782] [2021-12-18 22:33:48,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:33:48,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 22:33:48,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:48,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 22:33:48,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-12-18 22:33:48,829 INFO L87 Difference]: Start difference. First operand 568 states and 799 transitions. Second operand has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 10 states have internal predecessors, (56), 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) [2021-12-18 22:33:49,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:49,277 INFO L93 Difference]: Finished difference Result 712 states and 930 transitions. [2021-12-18 22:33:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 22:33:49,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 10 states have internal predecessors, (56), 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 31 [2021-12-18 22:33:49,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:49,279 INFO L225 Difference]: With dead ends: 712 [2021-12-18 22:33:49,280 INFO L226 Difference]: Without dead ends: 712 [2021-12-18 22:33:49,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-12-18 22:33:49,280 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 379 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:49,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 254 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 389 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2021-12-18 22:33:49,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-12-18 22:33:49,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 637. [2021-12-18 22:33:49,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 575 states have (on average 1.4191304347826086) internal successors, (816), 606 states have internal predecessors, (816), 15 states have call successors, (15), 15 states have call predecessors, (15), 32 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) [2021-12-18 22:33:49,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 885 transitions. [2021-12-18 22:33:49,293 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 885 transitions. Word has length 31 [2021-12-18 22:33:49,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:49,293 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 885 transitions. [2021-12-18 22:33:49,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 10 states have internal predecessors, (56), 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) [2021-12-18 22:33:49,293 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 885 transitions. [2021-12-18 22:33:49,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-18 22:33:49,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:49,294 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:33:49,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 22:33:49,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:49,516 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:49,516 INFO L85 PathProgramCache]: Analyzing trace with hash -132941611, now seen corresponding path program 1 times [2021-12-18 22:33:49,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:49,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719504172] [2021-12-18 22:33:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:49,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:49,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:49,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:49,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719504172] [2021-12-18 22:33:49,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719504172] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:49,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898784709] [2021-12-18 22:33:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:49,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:49,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:49,712 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:33:49,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 22:33:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:49,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 22:33:49,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:50,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:33:50,037 INFO L388 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 [2021-12-18 22:33:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:50,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:33:50,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898784709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:50,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:33:50,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-12-18 22:33:50,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992419737] [2021-12-18 22:33:50,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:33:50,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 22:33:50,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:50,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 22:33:50,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-18 22:33:50,352 INFO L87 Difference]: Start difference. First operand 637 states and 885 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) [2021-12-18 22:33:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:51,125 INFO L93 Difference]: Finished difference Result 670 states and 889 transitions. [2021-12-18 22:33:51,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 22:33:51,126 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 [2021-12-18 22:33:51,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:51,128 INFO L225 Difference]: With dead ends: 670 [2021-12-18 22:33:51,128 INFO L226 Difference]: Without dead ends: 670 [2021-12-18 22:33:51,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 22:33:51,129 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 452 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:51,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 281 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 512 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2021-12-18 22:33:51,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-12-18 22:33:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 637. [2021-12-18 22:33:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 575 states have (on average 1.3965217391304348) internal successors, (803), 606 states have internal predecessors, (803), 15 states have call successors, (15), 15 states have call predecessors, (15), 32 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) [2021-12-18 22:33:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 872 transitions. [2021-12-18 22:33:51,139 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 872 transitions. Word has length 35 [2021-12-18 22:33:51,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:51,139 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 872 transitions. [2021-12-18 22:33:51,139 INFO L471 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) [2021-12-18 22:33:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 872 transitions. [2021-12-18 22:33:51,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 22:33:51,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:51,140 INFO L514 BasicCegarLoop]: 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, 1] [2021-12-18 22:33:51,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-18 22:33:51,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:51,357 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:51,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1525473162, now seen corresponding path program 1 times [2021-12-18 22:33:51,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:51,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449108405] [2021-12-18 22:33:51,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:51,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:51,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 22:33:51,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:51,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449108405] [2021-12-18 22:33:51,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449108405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:51,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785331690] [2021-12-18 22:33:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:51,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:51,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:51,473 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) [2021-12-18 22:33:51,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 22:33:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:51,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 22:33:51,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:51,743 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:33:51,743 INFO L388 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 [2021-12-18 22:33:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 22:33:51,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:33:51,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-18 22:33:52,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-18 22:33:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 22:33:52,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785331690] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:33:52,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:33:52,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 16 [2021-12-18 22:33:52,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480880331] [2021-12-18 22:33:52,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:33:52,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 22:33:52,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:52,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 22:33:52,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-12-18 22:33:52,027 INFO L87 Difference]: Start difference. First operand 637 states and 872 transitions. Second operand has 18 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:33:52,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:52,361 INFO L93 Difference]: Finished difference Result 704 states and 926 transitions. [2021-12-18 22:33:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 22:33:52,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2021-12-18 22:33:52,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:52,364 INFO L225 Difference]: With dead ends: 704 [2021-12-18 22:33:52,364 INFO L226 Difference]: Without dead ends: 704 [2021-12-18 22:33:52,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-12-18 22:33:52,365 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 524 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:52,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 172 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 320 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2021-12-18 22:33:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-12-18 22:33:52,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 645. [2021-12-18 22:33:52,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 586 states have (on average 1.3976109215017065) internal successors, (819), 614 states have internal predecessors, (819), 15 states have call successors, (15), 15 states have call predecessors, (15), 29 states have return successors, (48), 15 states have call predecessors, (48), 15 states have call successors, (48) [2021-12-18 22:33:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 882 transitions. [2021-12-18 22:33:52,381 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 882 transitions. Word has length 36 [2021-12-18 22:33:52,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:52,382 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 882 transitions. [2021-12-18 22:33:52,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 22:33:52,382 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 882 transitions. [2021-12-18 22:33:52,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-18 22:33:52,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:52,384 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-18 22:33:52,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 22:33:52,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-18 22:33:52,604 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:52,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:52,604 INFO L85 PathProgramCache]: Analyzing trace with hash 45027747, now seen corresponding path program 1 times [2021-12-18 22:33:52,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:52,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814155869] [2021-12-18 22:33:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:52,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:52,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:52,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:52,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814155869] [2021-12-18 22:33:52,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814155869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:52,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488022559] [2021-12-18 22:33:52,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:52,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:52,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:52,840 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) [2021-12-18 22:33:52,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 22:33:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:52,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 22:33:52,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:53,251 INFO L388 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 [2021-12-18 22:33:53,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:33:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 22:33:53,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:33:53,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488022559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:53,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:33:53,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2021-12-18 22:33:53,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533214537] [2021-12-18 22:33:53,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:33:53,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 22:33:53,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:53,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 22:33:53,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-12-18 22:33:53,404 INFO L87 Difference]: Start difference. First operand 645 states and 882 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 13 states have internal predecessors, (62), 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) [2021-12-18 22:33:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:54,567 INFO L93 Difference]: Finished difference Result 544 states and 679 transitions. [2021-12-18 22:33:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 22:33:54,569 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 13 states have internal predecessors, (62), 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 37 [2021-12-18 22:33:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:54,571 INFO L225 Difference]: With dead ends: 544 [2021-12-18 22:33:54,571 INFO L226 Difference]: Without dead ends: 544 [2021-12-18 22:33:54,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 22:33:54,572 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 653 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:54,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 368 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 732 Invalid, 0 Unknown, 81 Unchecked, 0.5s Time] [2021-12-18 22:33:54,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-12-18 22:33:54,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 429. [2021-12-18 22:33:54,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 386 states have (on average 1.3860103626943006) internal successors, (535), 408 states have internal predecessors, (535), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-18 22:33:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 572 transitions. [2021-12-18 22:33:54,579 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 572 transitions. Word has length 37 [2021-12-18 22:33:54,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:54,579 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 572 transitions. [2021-12-18 22:33:54,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 13 states have internal predecessors, (62), 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) [2021-12-18 22:33:54,579 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 572 transitions. [2021-12-18 22:33:54,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 22:33:54,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:54,580 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:33:54,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 22:33:54,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-18 22:33:54,793 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:54,793 INFO L85 PathProgramCache]: Analyzing trace with hash 634414932, now seen corresponding path program 1 times [2021-12-18 22:33:54,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:54,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226325530] [2021-12-18 22:33:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:54,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:54,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:54,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:54,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226325530] [2021-12-18 22:33:54,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226325530] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:54,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591116535] [2021-12-18 22:33:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:54,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:54,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:54,834 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) [2021-12-18 22:33:54,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 22:33:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:54,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 22:33:54,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:54,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:33:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:55,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591116535] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:33:55,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:33:55,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2021-12-18 22:33:55,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133154040] [2021-12-18 22:33:55,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:33:55,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:33:55,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:55,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:33:55,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:33:55,009 INFO L87 Difference]: Start difference. First operand 429 states and 572 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) [2021-12-18 22:33:55,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:55,082 INFO L93 Difference]: Finished difference Result 448 states and 585 transitions. [2021-12-18 22:33:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:33:55,083 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 [2021-12-18 22:33:55,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:55,084 INFO L225 Difference]: With dead ends: 448 [2021-12-18 22:33:55,084 INFO L226 Difference]: Without dead ends: 448 [2021-12-18 22:33:55,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 22:33:55,085 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 72 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:55,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 53 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:33:55,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-12-18 22:33:55,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 426. [2021-12-18 22:33:55,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 385 states have (on average 1.3662337662337662) internal successors, (526), 405 states have internal predecessors, (526), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-18 22:33:55,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 563 transitions. [2021-12-18 22:33:55,092 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 563 transitions. Word has length 40 [2021-12-18 22:33:55,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:55,092 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 563 transitions. [2021-12-18 22:33:55,092 INFO L471 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) [2021-12-18 22:33:55,092 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 563 transitions. [2021-12-18 22:33:55,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 22:33:55,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:55,092 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:33:55,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-18 22:33:55,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-18 22:33:55,310 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:55,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:55,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1807973484, now seen corresponding path program 1 times [2021-12-18 22:33:55,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:55,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153268760] [2021-12-18 22:33:55,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:55,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:55,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:55,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:55,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153268760] [2021-12-18 22:33:55,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153268760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:55,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391980803] [2021-12-18 22:33:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:55,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:55,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:55,363 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) [2021-12-18 22:33:55,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 22:33:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:55,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 22:33:55,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:55,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:33:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:55,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391980803] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:33:55,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:33:55,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2021-12-18 22:33:55,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775630025] [2021-12-18 22:33:55,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:33:55,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:33:55,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:55,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:33:55,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:33:55,579 INFO L87 Difference]: Start difference. First operand 426 states and 563 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) [2021-12-18 22:33:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:55,649 INFO L93 Difference]: Finished difference Result 445 states and 575 transitions. [2021-12-18 22:33:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:33:55,651 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 [2021-12-18 22:33:55,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:55,652 INFO L225 Difference]: With dead ends: 445 [2021-12-18 22:33:55,652 INFO L226 Difference]: Without dead ends: 445 [2021-12-18 22:33:55,653 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:33:55,653 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:55,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 43 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:33:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-12-18 22:33:55,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 424. [2021-12-18 22:33:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 385 states have (on average 1.3428571428571427) internal successors, (517), 403 states have internal predecessors, (517), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-18 22:33:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 554 transitions. [2021-12-18 22:33:55,659 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 554 transitions. Word has length 41 [2021-12-18 22:33:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:55,659 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 554 transitions. [2021-12-18 22:33:55,659 INFO L471 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) [2021-12-18 22:33:55,659 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 554 transitions. [2021-12-18 22:33:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 22:33:55,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:55,659 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:33:55,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 22:33:55,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-18 22:33:55,875 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:55,876 INFO L85 PathProgramCache]: Analyzing trace with hash -212603050, now seen corresponding path program 1 times [2021-12-18 22:33:55,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:55,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356710529] [2021-12-18 22:33:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:55,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:55,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:55,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:55,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356710529] [2021-12-18 22:33:55,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356710529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:55,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710324082] [2021-12-18 22:33:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:55,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:55,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:55,914 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) [2021-12-18 22:33:55,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 22:33:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:55,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 22:33:55,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:55,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:33:56,039 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 22:33:56,039 INFO L388 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 [2021-12-18 22:33:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:56,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:33:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:56,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710324082] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:33:56,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:33:56,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2021-12-18 22:33:56,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907324732] [2021-12-18 22:33:56,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:33:56,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 22:33:56,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:56,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 22:33:56,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 22:33:56,224 INFO L87 Difference]: Start difference. First operand 424 states and 554 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) [2021-12-18 22:33:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:56,322 INFO L93 Difference]: Finished difference Result 460 states and 578 transitions. [2021-12-18 22:33:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 22:33:56,322 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 [2021-12-18 22:33:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:56,324 INFO L225 Difference]: With dead ends: 460 [2021-12-18 22:33:56,324 INFO L226 Difference]: Without dead ends: 460 [2021-12-18 22:33:56,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-18 22:33:56,324 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 83 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:56,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 107 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 111 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2021-12-18 22:33:56,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-18 22:33:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 430. [2021-12-18 22:33:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 391 states have (on average 1.3248081841432224) internal successors, (518), 409 states have internal predecessors, (518), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-18 22:33:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 555 transitions. [2021-12-18 22:33:56,330 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 555 transitions. Word has length 42 [2021-12-18 22:33:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:56,330 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 555 transitions. [2021-12-18 22:33:56,330 INFO L471 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) [2021-12-18 22:33:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 555 transitions. [2021-12-18 22:33:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 22:33:56,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:56,331 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:33:56,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 22:33:56,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:56,553 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:56,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1366889029, now seen corresponding path program 1 times [2021-12-18 22:33:56,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:56,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718368894] [2021-12-18 22:33:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:56,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:56,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:56,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:56,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718368894] [2021-12-18 22:33:56,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718368894] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:56,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195356221] [2021-12-18 22:33:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:56,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:56,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:56,589 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) [2021-12-18 22:33:56,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 22:33:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:56,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 22:33:56,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:33:56,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:33:56,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195356221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:33:56,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 22:33:56,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-18 22:33:56,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726283793] [2021-12-18 22:33:56,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:33:56,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:33:56,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:56,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:33:56,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 22:33:56,722 INFO L87 Difference]: Start difference. First operand 430 states and 555 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) [2021-12-18 22:33:56,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:56,745 INFO L93 Difference]: Finished difference Result 489 states and 604 transitions. [2021-12-18 22:33:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:33:56,746 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 [2021-12-18 22:33:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:56,748 INFO L225 Difference]: With dead ends: 489 [2021-12-18 22:33:56,748 INFO L226 Difference]: Without dead ends: 489 [2021-12-18 22:33:56,748 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:33:56,749 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 66 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:56,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 177 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:33:56,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-12-18 22:33:56,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 420. [2021-12-18 22:33:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 381 states have (on average 1.2939632545931758) internal successors, (493), 399 states have internal predecessors, (493), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-18 22:33:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 530 transitions. [2021-12-18 22:33:56,756 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 530 transitions. Word has length 45 [2021-12-18 22:33:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:56,756 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 530 transitions. [2021-12-18 22:33:56,756 INFO L471 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) [2021-12-18 22:33:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 530 transitions. [2021-12-18 22:33:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 22:33:56,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:56,757 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:33:56,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-18 22:33:56,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-18 22:33:56,975 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:56,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:56,976 INFO L85 PathProgramCache]: Analyzing trace with hash -624108164, now seen corresponding path program 1 times [2021-12-18 22:33:56,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:56,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948691721] [2021-12-18 22:33:56,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:56,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:57,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:57,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:33:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:33:57,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:57,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948691721] [2021-12-18 22:33:57,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948691721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:57,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549670350] [2021-12-18 22:33:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:57,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:57,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:57,052 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) [2021-12-18 22:33:57,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 22:33:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:57,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 22:33:57,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:57,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:33:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:33:57,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549670350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:33:57,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:33:57,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2021-12-18 22:33:57,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123956717] [2021-12-18 22:33:57,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:33:57,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 22:33:57,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:57,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 22:33:57,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-18 22:33:57,347 INFO L87 Difference]: Start difference. First operand 420 states and 530 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:33:57,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:57,501 INFO L93 Difference]: Finished difference Result 339 states and 404 transitions. [2021-12-18 22:33:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 22:33:57,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2021-12-18 22:33:57,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:57,503 INFO L225 Difference]: With dead ends: 339 [2021-12-18 22:33:57,503 INFO L226 Difference]: Without dead ends: 339 [2021-12-18 22:33:57,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-12-18 22:33:57,504 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 120 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:57,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 130 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:33:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-18 22:33:57,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 324. [2021-12-18 22:33:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 292 states have (on average 1.2568493150684932) internal successors, (367), 307 states have internal predecessors, (367), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-12-18 22:33:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 392 transitions. [2021-12-18 22:33:57,508 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 392 transitions. Word has length 48 [2021-12-18 22:33:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:57,508 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 392 transitions. [2021-12-18 22:33:57,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 22:33:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 392 transitions. [2021-12-18 22:33:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 22:33:57,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:57,509 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:33:57,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 22:33:57,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-18 22:33:57,727 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:57,728 INFO L85 PathProgramCache]: Analyzing trace with hash -377504153, now seen corresponding path program 1 times [2021-12-18 22:33:57,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:57,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701852206] [2021-12-18 22:33:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:57,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:57,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:57,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:33:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 22:33:57,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:57,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701852206] [2021-12-18 22:33:57,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701852206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:57,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261579100] [2021-12-18 22:33:57,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:57,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:57,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:57,825 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) [2021-12-18 22:33:57,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 22:33:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:57,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 22:33:57,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:33:58,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:33:58,315 INFO L388 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 [2021-12-18 22:33:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 22:33:58,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:33:58,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261579100] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:58,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:33:58,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2021-12-18 22:33:58,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743164346] [2021-12-18 22:33:58,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:33:58,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 22:33:58,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:33:58,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 22:33:58,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-12-18 22:33:58,451 INFO L87 Difference]: Start difference. First operand 324 states and 392 transitions. Second operand has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 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) [2021-12-18 22:33:58,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:33:58,874 INFO L93 Difference]: Finished difference Result 352 states and 406 transitions. [2021-12-18 22:33:58,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 22:33:58,899 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 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 48 [2021-12-18 22:33:58,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:33:58,900 INFO L225 Difference]: With dead ends: 352 [2021-12-18 22:33:58,900 INFO L226 Difference]: Without dead ends: 352 [2021-12-18 22:33:58,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-12-18 22:33:58,901 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 278 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:33:58,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 271 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 328 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2021-12-18 22:33:58,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-18 22:33:58,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 323. [2021-12-18 22:33:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.2465753424657535) internal successors, (364), 306 states have internal predecessors, (364), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:33:58,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 387 transitions. [2021-12-18 22:33:58,904 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 387 transitions. Word has length 48 [2021-12-18 22:33:58,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:33:58,905 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 387 transitions. [2021-12-18 22:33:58,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 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) [2021-12-18 22:33:58,905 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 387 transitions. [2021-12-18 22:33:58,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 22:33:58,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:33:58,905 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:33:58,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 22:33:59,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-18 22:33:59,106 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:33:59,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:33:59,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2004239674, now seen corresponding path program 1 times [2021-12-18 22:33:59,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:33:59,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311038512] [2021-12-18 22:33:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:59,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:33:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:59,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:33:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:59,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:33:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 22:33:59,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:33:59,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311038512] [2021-12-18 22:33:59,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311038512] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:33:59,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753948303] [2021-12-18 22:33:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:33:59,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:33:59,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:33:59,524 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) [2021-12-18 22:33:59,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 22:33:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:33:59,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 22:33:59,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:00,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:34:00,134 INFO L388 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 [2021-12-18 22:34:00,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:34:00,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:34:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 22:34:00,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:00,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753948303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:00,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:00,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 22 [2021-12-18 22:34:00,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717431323] [2021-12-18 22:34:00,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:00,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 22:34:00,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:00,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 22:34:00,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-12-18 22:34:00,356 INFO L87 Difference]: Start difference. First operand 323 states and 387 transitions. Second operand has 24 states, 22 states have (on average 3.409090909090909) internal successors, (75), 19 states have internal predecessors, (75), 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) [2021-12-18 22:34:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:01,375 INFO L93 Difference]: Finished difference Result 359 states and 407 transitions. [2021-12-18 22:34:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 22:34:01,375 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.409090909090909) internal successors, (75), 19 states have internal predecessors, (75), 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 50 [2021-12-18 22:34:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:01,376 INFO L225 Difference]: With dead ends: 359 [2021-12-18 22:34:01,376 INFO L226 Difference]: Without dead ends: 359 [2021-12-18 22:34:01,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=432, Invalid=1920, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 22:34:01,377 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 414 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:01,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 300 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 533 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2021-12-18 22:34:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-12-18 22:34:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 323. [2021-12-18 22:34:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.2431506849315068) internal successors, (363), 306 states have internal predecessors, (363), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:01,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 386 transitions. [2021-12-18 22:34:01,381 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 386 transitions. Word has length 50 [2021-12-18 22:34:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:01,381 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 386 transitions. [2021-12-18 22:34:01,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.409090909090909) internal successors, (75), 19 states have internal predecessors, (75), 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) [2021-12-18 22:34:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 386 transitions. [2021-12-18 22:34:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 22:34:01,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:01,381 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:34:01,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:01,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-18 22:34:01,582 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:01,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:01,582 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001345, now seen corresponding path program 1 times [2021-12-18 22:34:01,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:01,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580181028] [2021-12-18 22:34:01,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:01,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:01,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:01,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:34:01,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:01,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580181028] [2021-12-18 22:34:01,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580181028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:01,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077816371] [2021-12-18 22:34:01,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:01,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:01,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:01,732 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) [2021-12-18 22:34:01,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 22:34:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:01,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 22:34:01,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:01,917 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:34:01,917 INFO L388 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 [2021-12-18 22:34:02,027 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 22:34:02,028 INFO L388 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 [2021-12-18 22:34:02,066 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:34:02,067 INFO L388 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 [2021-12-18 22:34:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:02,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:02,198 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:34:02,199 INFO L388 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 [2021-12-18 22:34:02,362 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:34:02,362 INFO L388 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 56 treesize of output 53 [2021-12-18 22:34:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:02,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077816371] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:34:02,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:34:02,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 10] total 26 [2021-12-18 22:34:02,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723531311] [2021-12-18 22:34:02,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:02,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 22:34:02,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:02,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 22:34:02,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-12-18 22:34:02,511 INFO L87 Difference]: Start difference. First operand 323 states and 386 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) [2021-12-18 22:34:02,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:02,718 INFO L93 Difference]: Finished difference Result 336 states and 398 transitions. [2021-12-18 22:34:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 22:34:02,718 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 [2021-12-18 22:34:02,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:02,719 INFO L225 Difference]: With dead ends: 336 [2021-12-18 22:34:02,719 INFO L226 Difference]: Without dead ends: 336 [2021-12-18 22:34:02,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=768, Unknown=0, NotChecked=0, Total=992 [2021-12-18 22:34:02,720 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 362 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:02,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 100 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 256 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2021-12-18 22:34:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-18 22:34:02,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 322. [2021-12-18 22:34:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2363013698630136) internal successors, (361), 305 states have internal predecessors, (361), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 384 transitions. [2021-12-18 22:34:02,724 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 384 transitions. Word has length 51 [2021-12-18 22:34:02,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:02,724 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 384 transitions. [2021-12-18 22:34:02,724 INFO L471 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) [2021-12-18 22:34:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 384 transitions. [2021-12-18 22:34:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 22:34:02,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:02,724 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:34:02,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:02,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:02,939 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001344, now seen corresponding path program 1 times [2021-12-18 22:34:02,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:02,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448036396] [2021-12-18 22:34:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:02,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:02,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:03,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:34:03,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:03,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448036396] [2021-12-18 22:34:03,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448036396] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:03,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528943800] [2021-12-18 22:34:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:03,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:03,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:03,042 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) [2021-12-18 22:34:03,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 22:34:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:03,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 22:34:03,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:03,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:34:03,258 INFO L388 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 [2021-12-18 22:34:03,265 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:34:03,265 INFO L388 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 [2021-12-18 22:34:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:34:03,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:34:03,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528943800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:34:03,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 22:34:03,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2021-12-18 22:34:03,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737775759] [2021-12-18 22:34:03,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:34:03,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 22:34:03,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:03,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 22:34:03,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-12-18 22:34:03,329 INFO L87 Difference]: Start difference. First operand 322 states and 384 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) [2021-12-18 22:34:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:03,440 INFO L93 Difference]: Finished difference Result 372 states and 430 transitions. [2021-12-18 22:34:03,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 22:34:03,440 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 [2021-12-18 22:34:03,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:03,441 INFO L225 Difference]: With dead ends: 372 [2021-12-18 22:34:03,441 INFO L226 Difference]: Without dead ends: 372 [2021-12-18 22:34:03,441 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:34:03,442 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 181 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:03,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 64 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:34:03,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-12-18 22:34:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 322. [2021-12-18 22:34:03,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.226027397260274) internal successors, (358), 305 states have internal predecessors, (358), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 381 transitions. [2021-12-18 22:34:03,445 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 381 transitions. Word has length 51 [2021-12-18 22:34:03,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:03,445 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 381 transitions. [2021-12-18 22:34:03,446 INFO L471 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) [2021-12-18 22:34:03,446 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 381 transitions. [2021-12-18 22:34:03,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 22:34:03,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:03,446 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1] [2021-12-18 22:34:03,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:03,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-18 22:34:03,655 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash 410026143, now seen corresponding path program 1 times [2021-12-18 22:34:03,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:03,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410513380] [2021-12-18 22:34:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:03,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:03,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:03,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 22:34:03,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:03,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410513380] [2021-12-18 22:34:03,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410513380] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:03,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255039006] [2021-12-18 22:34:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:03,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:03,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:03,732 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) [2021-12-18 22:34:03,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 22:34:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:03,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 22:34:03,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:03,887 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 22:34:03,887 INFO L388 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 [2021-12-18 22:34:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 22:34:03,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:04,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255039006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:04,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:04,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-12-18 22:34:04,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319312086] [2021-12-18 22:34:04,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:04,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 22:34:04,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:04,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 22:34:04,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-12-18 22:34:04,116 INFO L87 Difference]: Start difference. First operand 322 states and 381 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 22:34:04,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:04,345 INFO L93 Difference]: Finished difference Result 344 states and 397 transitions. [2021-12-18 22:34:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 22:34:04,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-12-18 22:34:04,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:04,347 INFO L225 Difference]: With dead ends: 344 [2021-12-18 22:34:04,347 INFO L226 Difference]: Without dead ends: 344 [2021-12-18 22:34:04,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-12-18 22:34:04,347 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 213 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:04,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 148 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 210 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2021-12-18 22:34:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-12-18 22:34:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 322. [2021-12-18 22:34:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2191780821917808) internal successors, (356), 305 states have internal predecessors, (356), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 379 transitions. [2021-12-18 22:34:04,352 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 379 transitions. Word has length 51 [2021-12-18 22:34:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:04,352 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 379 transitions. [2021-12-18 22:34:04,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 22:34:04,352 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 379 transitions. [2021-12-18 22:34:04,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 22:34:04,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:04,353 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1] [2021-12-18 22:34:04,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-18 22:34:04,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:04,576 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:04,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2001887703, now seen corresponding path program 2 times [2021-12-18 22:34:04,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:04,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108920403] [2021-12-18 22:34:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:04,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:04,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:04,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 22:34:04,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:04,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108920403] [2021-12-18 22:34:04,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108920403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:04,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554175219] [2021-12-18 22:34:04,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:34:04,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:04,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:04,700 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) [2021-12-18 22:34:04,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 22:34:04,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:34:04,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:34:04,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 22:34:04,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:04,915 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 22:34:04,915 INFO L388 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 [2021-12-18 22:34:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 22:34:04,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:04,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554175219] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:04,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:04,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-12-18 22:34:04,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158689940] [2021-12-18 22:34:04,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:04,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 22:34:04,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:04,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 22:34:04,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-18 22:34:04,997 INFO L87 Difference]: Start difference. First operand 322 states and 379 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 22:34:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:05,223 INFO L93 Difference]: Finished difference Result 343 states and 392 transitions. [2021-12-18 22:34:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 22:34:05,224 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-12-18 22:34:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:05,225 INFO L225 Difference]: With dead ends: 343 [2021-12-18 22:34:05,225 INFO L226 Difference]: Without dead ends: 343 [2021-12-18 22:34:05,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-12-18 22:34:05,226 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 184 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:05,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 151 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 216 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2021-12-18 22:34:05,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-18 22:34:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 322. [2021-12-18 22:34:05,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2157534246575343) internal successors, (355), 305 states have internal predecessors, (355), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 378 transitions. [2021-12-18 22:34:05,230 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 378 transitions. Word has length 51 [2021-12-18 22:34:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:05,230 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 378 transitions. [2021-12-18 22:34:05,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 22:34:05,231 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 378 transitions. [2021-12-18 22:34:05,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 22:34:05,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:05,231 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:34:05,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:05,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:05,451 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:05,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:05,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1016532274, now seen corresponding path program 1 times [2021-12-18 22:34:05,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:05,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226052489] [2021-12-18 22:34:05,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:05,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:05,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:05,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:34:05,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:05,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226052489] [2021-12-18 22:34:05,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226052489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:05,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224010380] [2021-12-18 22:34:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:05,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:05,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:05,916 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) [2021-12-18 22:34:05,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 22:34:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:06,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 22:34:06,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:06,214 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:34:06,214 INFO L388 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 [2021-12-18 22:34:06,426 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-18 22:34:06,426 INFO L388 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 [2021-12-18 22:34:06,481 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-18 22:34:06,482 INFO L388 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 [2021-12-18 22:34:06,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:34:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:06,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:06,715 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-18 22:34:06,716 INFO L388 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 [2021-12-18 22:34:06,993 INFO L354 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2021-12-18 22:34:06,993 INFO L388 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 [2021-12-18 22:34:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:07,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224010380] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:34:07,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:34:07,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 14] total 44 [2021-12-18 22:34:07,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683721779] [2021-12-18 22:34:07,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:07,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 22:34:07,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:07,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 22:34:07,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 22:34:07,294 INFO L87 Difference]: Start difference. First operand 322 states and 378 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) [2021-12-18 22:34:07,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:07,951 INFO L93 Difference]: Finished difference Result 374 states and 429 transitions. [2021-12-18 22:34:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 22:34:07,951 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 [2021-12-18 22:34:07,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:07,952 INFO L225 Difference]: With dead ends: 374 [2021-12-18 22:34:07,952 INFO L226 Difference]: Without dead ends: 374 [2021-12-18 22:34:07,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=529, Invalid=2551, Unknown=0, NotChecked=0, Total=3080 [2021-12-18 22:34:07,954 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 681 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:07,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 218 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 721 Invalid, 0 Unknown, 14 Unchecked, 0.4s Time] [2021-12-18 22:34:07,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-12-18 22:34:07,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 322. [2021-12-18 22:34:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2089041095890412) internal successors, (353), 305 states have internal predecessors, (353), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 376 transitions. [2021-12-18 22:34:07,958 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 376 transitions. Word has length 52 [2021-12-18 22:34:07,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:07,958 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 376 transitions. [2021-12-18 22:34:07,958 INFO L471 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) [2021-12-18 22:34:07,958 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 376 transitions. [2021-12-18 22:34:07,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 22:34:07,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:07,959 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2021-12-18 22:34:07,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-18 22:34:08,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:08,175 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:08,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:08,176 INFO L85 PathProgramCache]: Analyzing trace with hash -174091406, now seen corresponding path program 1 times [2021-12-18 22:34:08,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:08,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49454306] [2021-12-18 22:34:08,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:08,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:08,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:08,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-18 22:34:08,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:08,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49454306] [2021-12-18 22:34:08,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49454306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:08,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546830207] [2021-12-18 22:34:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:08,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:08,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:08,279 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) [2021-12-18 22:34:08,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 22:34:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:08,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 22:34:08,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:08,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:34:08,505 INFO L388 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 [2021-12-18 22:34:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 22:34:08,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:08,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546830207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:08,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:08,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-12-18 22:34:08,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653915109] [2021-12-18 22:34:08,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:08,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 22:34:08,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:08,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 22:34:08,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-12-18 22:34:08,796 INFO L87 Difference]: Start difference. First operand 322 states and 376 transitions. Second operand has 17 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:34:09,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:09,200 INFO L93 Difference]: Finished difference Result 353 states and 396 transitions. [2021-12-18 22:34:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 22:34:09,200 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2021-12-18 22:34:09,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:09,201 INFO L225 Difference]: With dead ends: 353 [2021-12-18 22:34:09,201 INFO L226 Difference]: Without dead ends: 353 [2021-12-18 22:34:09,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 22:34:09,202 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 339 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:09,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 243 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 328 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2021-12-18 22:34:09,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-18 22:34:09,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 322. [2021-12-18 22:34:09,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.1883561643835616) internal successors, (347), 305 states have internal predecessors, (347), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 370 transitions. [2021-12-18 22:34:09,207 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 370 transitions. Word has length 52 [2021-12-18 22:34:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:09,207 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 370 transitions. [2021-12-18 22:34:09,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:34:09,207 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 370 transitions. [2021-12-18 22:34:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 22:34:09,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:09,207 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2021-12-18 22:34:09,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:09,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:09,423 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:09,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:09,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1928976600, now seen corresponding path program 2 times [2021-12-18 22:34:09,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:09,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257385275] [2021-12-18 22:34:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:09,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:09,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:09,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-18 22:34:09,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:09,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257385275] [2021-12-18 22:34:09,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257385275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:09,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693566049] [2021-12-18 22:34:09,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:34:09,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:09,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:09,532 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) [2021-12-18 22:34:09,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 22:34:09,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:34:09,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:34:09,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 22:34:09,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:09,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:34:09,812 INFO L388 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 [2021-12-18 22:34:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 22:34:09,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:09,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693566049] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:09,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:09,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-12-18 22:34:09,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845537638] [2021-12-18 22:34:09,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:09,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 22:34:09,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:09,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 22:34:09,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-12-18 22:34:09,970 INFO L87 Difference]: Start difference. First operand 322 states and 370 transitions. Second operand has 16 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 22:34:10,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:10,356 INFO L93 Difference]: Finished difference Result 349 states and 390 transitions. [2021-12-18 22:34:10,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 22:34:10,356 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2021-12-18 22:34:10,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:10,357 INFO L225 Difference]: With dead ends: 349 [2021-12-18 22:34:10,357 INFO L226 Difference]: Without dead ends: 349 [2021-12-18 22:34:10,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=249, Invalid=743, Unknown=0, NotChecked=0, Total=992 [2021-12-18 22:34:10,358 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 237 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:10,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 294 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 225 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2021-12-18 22:34:10,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-12-18 22:34:10,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 322. [2021-12-18 22:34:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.1815068493150684) internal successors, (345), 305 states have internal predecessors, (345), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 368 transitions. [2021-12-18 22:34:10,361 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 368 transitions. Word has length 52 [2021-12-18 22:34:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:10,361 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 368 transitions. [2021-12-18 22:34:10,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 22:34:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 368 transitions. [2021-12-18 22:34:10,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 22:34:10,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:10,362 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:34:10,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:10,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-18 22:34:10,563 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:10,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:10,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1447729377, now seen corresponding path program 1 times [2021-12-18 22:34:10,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:10,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017210334] [2021-12-18 22:34:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:10,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:10,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:10,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:34:11,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:11,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017210334] [2021-12-18 22:34:11,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017210334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:11,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243644676] [2021-12-18 22:34:11,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:11,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:11,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:11,080 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) [2021-12-18 22:34:11,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 22:34:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:11,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 22:34:11,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:11,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:34:11,467 INFO L388 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 [2021-12-18 22:34:11,480 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 22:34:11,481 INFO L388 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 [2021-12-18 22:34:11,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-18 22:34:11,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:34:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:34:11,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:11,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 22:34:11,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-12-18 22:34:11,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-12-18 22:34:12,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:34:12,020 INFO L388 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 47 treesize of output 51 [2021-12-18 22:34:12,112 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:34:12,112 INFO L388 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 [2021-12-18 22:34:12,145 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-12-18 22:34:12,146 INFO L388 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 [2021-12-18 22:34:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:34:12,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243644676] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:34:12,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:34:12,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 10] total 37 [2021-12-18 22:34:12,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872789369] [2021-12-18 22:34:12,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:12,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-18 22:34:12,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:12,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-18 22:34:12,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-12-18 22:34:12,200 INFO L87 Difference]: Start difference. First operand 322 states and 368 transitions. Second operand has 38 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 34 states have internal predecessors, (143), 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) [2021-12-18 22:34:13,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:13,285 INFO L93 Difference]: Finished difference Result 379 states and 424 transitions. [2021-12-18 22:34:13,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 22:34:13,285 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 34 states have internal predecessors, (143), 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 [2021-12-18 22:34:13,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:13,286 INFO L225 Difference]: With dead ends: 379 [2021-12-18 22:34:13,286 INFO L226 Difference]: Without dead ends: 379 [2021-12-18 22:34:13,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=649, Invalid=2891, Unknown=0, NotChecked=0, Total=3540 [2021-12-18 22:34:13,287 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 492 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:13,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 226 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 611 Invalid, 0 Unknown, 92 Unchecked, 0.3s Time] [2021-12-18 22:34:13,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-12-18 22:34:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 322. [2021-12-18 22:34:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.178082191780822) internal successors, (344), 305 states have internal predecessors, (344), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 367 transitions. [2021-12-18 22:34:13,291 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 367 transitions. Word has length 53 [2021-12-18 22:34:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:13,291 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 367 transitions. [2021-12-18 22:34:13,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 34 states have internal predecessors, (143), 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) [2021-12-18 22:34:13,291 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 367 transitions. [2021-12-18 22:34:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 22:34:13,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:13,292 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:34:13,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-18 22:34:13,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-18 22:34:13,501 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:13,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:13,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1929937680, now seen corresponding path program 1 times [2021-12-18 22:34:13,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:13,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017813286] [2021-12-18 22:34:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:13,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:13,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:13,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:34:13,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:13,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017813286] [2021-12-18 22:34:13,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017813286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:13,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317189220] [2021-12-18 22:34:13,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:13,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:13,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:13,700 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) [2021-12-18 22:34:13,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 22:34:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:13,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 22:34:13,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:13,856 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 22:34:13,856 INFO L388 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 [2021-12-18 22:34:13,986 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-18 22:34:13,986 INFO L388 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 [2021-12-18 22:34:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:14,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:14,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317189220] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:14,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:14,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-12-18 22:34:14,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431890815] [2021-12-18 22:34:14,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:14,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 22:34:14,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:14,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 22:34:14,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-12-18 22:34:14,289 INFO L87 Difference]: Start difference. First operand 322 states and 367 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) [2021-12-18 22:34:14,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:14,805 INFO L93 Difference]: Finished difference Result 350 states and 391 transitions. [2021-12-18 22:34:14,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 22:34:14,805 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 [2021-12-18 22:34:14,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:14,806 INFO L225 Difference]: With dead ends: 350 [2021-12-18 22:34:14,806 INFO L226 Difference]: Without dead ends: 350 [2021-12-18 22:34:14,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 22:34:14,807 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 288 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:14,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 301 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 390 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2021-12-18 22:34:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-18 22:34:14,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 321. [2021-12-18 22:34:14,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 292 states have (on average 1.1712328767123288) internal successors, (342), 304 states have internal predecessors, (342), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:14,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 365 transitions. [2021-12-18 22:34:14,810 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 365 transitions. Word has length 54 [2021-12-18 22:34:14,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:14,810 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 365 transitions. [2021-12-18 22:34:14,810 INFO L471 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) [2021-12-18 22:34:14,810 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 365 transitions. [2021-12-18 22:34:14,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 22:34:14,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:14,811 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:34:14,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:15,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-18 22:34:15,019 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash 301474113, now seen corresponding path program 1 times [2021-12-18 22:34:15,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:15,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797446106] [2021-12-18 22:34:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:15,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:15,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:15,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:34:15,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:15,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797446106] [2021-12-18 22:34:15,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797446106] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:15,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247768147] [2021-12-18 22:34:15,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:15,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:15,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:15,228 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) [2021-12-18 22:34:15,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 22:34:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:15,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 22:34:15,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:15,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 22:34:15,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 22:34:15,751 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:34:15,752 INFO L388 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 [2021-12-18 22:34:15,765 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:34:15,766 INFO L388 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 [2021-12-18 22:34:15,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:34:16,007 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:34:16,007 INFO L388 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 22 [2021-12-18 22:34:16,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:34:16,013 INFO L388 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 19 [2021-12-18 22:34:16,213 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:34:16,213 INFO L388 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 [2021-12-18 22:34:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:16,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:16,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 22:34:16,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247768147] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:16,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:16,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 27 [2021-12-18 22:34:16,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333439036] [2021-12-18 22:34:16,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:16,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 22:34:16,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:16,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 22:34:16,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 22:34:16,440 INFO L87 Difference]: Start difference. First operand 321 states and 365 transitions. Second operand has 29 states, 24 states have (on average 4.166666666666667) internal successors, (100), 20 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:34:17,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:17,986 INFO L93 Difference]: Finished difference Result 353 states and 390 transitions. [2021-12-18 22:34:17,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 22:34:17,987 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 4.166666666666667) internal successors, (100), 20 states have internal predecessors, (100), 6 states have call successors, (6), 5 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 55 [2021-12-18 22:34:17,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:17,988 INFO L225 Difference]: With dead ends: 353 [2021-12-18 22:34:17,988 INFO L226 Difference]: Without dead ends: 353 [2021-12-18 22:34:17,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=598, Invalid=3308, Unknown=0, NotChecked=0, Total=3906 [2021-12-18 22:34:17,989 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 522 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:17,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 735 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 783 Invalid, 0 Unknown, 432 Unchecked, 0.4s Time] [2021-12-18 22:34:17,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-18 22:34:17,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 320. [2021-12-18 22:34:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 292 states have (on average 1.1643835616438356) internal successors, (340), 303 states have internal predecessors, (340), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:17,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 363 transitions. [2021-12-18 22:34:17,992 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 363 transitions. Word has length 55 [2021-12-18 22:34:17,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:17,992 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 363 transitions. [2021-12-18 22:34:17,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 4.166666666666667) internal successors, (100), 20 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:34:17,992 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 363 transitions. [2021-12-18 22:34:17,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 22:34:17,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:17,993 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:34:18,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:18,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-18 22:34:18,210 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:18,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:18,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1039811026, now seen corresponding path program 2 times [2021-12-18 22:34:18,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:18,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109405812] [2021-12-18 22:34:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:18,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:18,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:18,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 22:34:18,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:18,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109405812] [2021-12-18 22:34:18,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109405812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:18,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352012559] [2021-12-18 22:34:18,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:34:18,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:18,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:18,324 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:34:18,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-18 22:34:18,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:34:18,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:34:18,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 22:34:18,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:18,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:34:18,768 INFO L388 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 [2021-12-18 22:34:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 22:34:18,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:19,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352012559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:19,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:19,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-12-18 22:34:19,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524746575] [2021-12-18 22:34:19,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:19,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 22:34:19,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:19,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 22:34:19,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-18 22:34:19,028 INFO L87 Difference]: Start difference. First operand 320 states and 363 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) [2021-12-18 22:34:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:19,568 INFO L93 Difference]: Finished difference Result 341 states and 379 transitions. [2021-12-18 22:34:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 22:34:19,569 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 [2021-12-18 22:34:19,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:19,569 INFO L225 Difference]: With dead ends: 341 [2021-12-18 22:34:19,570 INFO L226 Difference]: Without dead ends: 341 [2021-12-18 22:34:19,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 22:34:19,570 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 306 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:19,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 360 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 419 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2021-12-18 22:34:19,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-12-18 22:34:19,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 320. [2021-12-18 22:34:19,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 292 states have (on average 1.154109589041096) internal successors, (337), 303 states have internal predecessors, (337), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:19,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 360 transitions. [2021-12-18 22:34:19,575 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 360 transitions. Word has length 56 [2021-12-18 22:34:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:19,575 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 360 transitions. [2021-12-18 22:34:19,575 INFO L471 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) [2021-12-18 22:34:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 360 transitions. [2021-12-18 22:34:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 22:34:19,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:19,576 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:34:19,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:19,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-18 22:34:19,777 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:19,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:19,777 INFO L85 PathProgramCache]: Analyzing trace with hash 717947847, now seen corresponding path program 1 times [2021-12-18 22:34:19,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:19,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786611449] [2021-12-18 22:34:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:19,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:19,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:19,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:34:20,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:20,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786611449] [2021-12-18 22:34:20,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786611449] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:20,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995947365] [2021-12-18 22:34:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:20,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:20,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:20,090 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:34:20,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-18 22:34:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:20,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-18 22:34:20,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:20,372 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:34:20,372 INFO L388 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 [2021-12-18 22:34:20,550 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:34:20,550 INFO L388 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 [2021-12-18 22:34:20,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:34:20,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:34:20,740 INFO L388 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 [2021-12-18 22:34:20,863 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:34:20,863 INFO L388 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 [2021-12-18 22:34:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:20,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:21,118 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:34:21,119 INFO L388 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 [2021-12-18 22:34:21,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 22:34:21,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995947365] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:21,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:21,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2021-12-18 22:34:21,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910636281] [2021-12-18 22:34:21,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:21,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 22:34:21,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:21,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 22:34:21,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 22:34:21,173 INFO L87 Difference]: Start difference. First operand 320 states and 360 transitions. Second operand has 31 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:34:22,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:22,493 INFO L93 Difference]: Finished difference Result 342 states and 378 transitions. [2021-12-18 22:34:22,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-18 22:34:22,494 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 6 states have call successors, (6), 5 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 59 [2021-12-18 22:34:22,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:22,495 INFO L225 Difference]: With dead ends: 342 [2021-12-18 22:34:22,495 INFO L226 Difference]: Without dead ends: 342 [2021-12-18 22:34:22,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=927, Invalid=3903, Unknown=0, NotChecked=0, Total=4830 [2021-12-18 22:34:22,496 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 989 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:22,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 457 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 524 Invalid, 0 Unknown, 279 Unchecked, 0.3s Time] [2021-12-18 22:34:22,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-18 22:34:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 317. [2021-12-18 22:34:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 292 states have (on average 1.1404109589041096) internal successors, (333), 300 states have internal predecessors, (333), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 356 transitions. [2021-12-18 22:34:22,507 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 356 transitions. Word has length 59 [2021-12-18 22:34:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:22,507 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 356 transitions. [2021-12-18 22:34:22,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:34:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 356 transitions. [2021-12-18 22:34:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 22:34:22,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:22,508 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-18 22:34:22,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:22,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-18 22:34:22,711 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:22,712 INFO L85 PathProgramCache]: Analyzing trace with hash 781546727, now seen corresponding path program 1 times [2021-12-18 22:34:22,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:22,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694051134] [2021-12-18 22:34:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:22,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:22,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:22,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:34:22,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:22,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694051134] [2021-12-18 22:34:22,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694051134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:22,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028800521] [2021-12-18 22:34:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:22,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:22,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:22,979 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:34:22,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-18 22:34:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:23,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 22:34:23,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:23,224 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 22:34:23,224 INFO L388 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 [2021-12-18 22:34:23,506 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-12-18 22:34:23,507 INFO L388 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 30 [2021-12-18 22:34:23,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 22:34:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:23,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:23,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028800521] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:23,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:23,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-12-18 22:34:23,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810089025] [2021-12-18 22:34:23,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:23,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 22:34:23,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 22:34:23,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-12-18 22:34:23,719 INFO L87 Difference]: Start difference. First operand 317 states and 356 transitions. Second operand has 24 states, 22 states have (on average 4.636363636363637) internal successors, (102), 21 states have internal predecessors, (102), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 22:34:24,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:24,824 INFO L93 Difference]: Finished difference Result 343 states and 378 transitions. [2021-12-18 22:34:24,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 22:34:24,824 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 4.636363636363637) internal successors, (102), 21 states have internal predecessors, (102), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 60 [2021-12-18 22:34:24,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:24,825 INFO L225 Difference]: With dead ends: 343 [2021-12-18 22:34:24,825 INFO L226 Difference]: Without dead ends: 343 [2021-12-18 22:34:24,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 61 SyntacticMatches, 12 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=582, Invalid=2498, Unknown=0, NotChecked=0, Total=3080 [2021-12-18 22:34:24,826 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 536 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:24,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 227 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 413 Invalid, 0 Unknown, 158 Unchecked, 0.2s Time] [2021-12-18 22:34:24,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-18 22:34:24,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 316. [2021-12-18 22:34:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 292 states have (on average 1.1335616438356164) internal successors, (331), 299 states have internal predecessors, (331), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 354 transitions. [2021-12-18 22:34:24,830 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 354 transitions. Word has length 60 [2021-12-18 22:34:24,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:24,830 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 354 transitions. [2021-12-18 22:34:24,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 4.636363636363637) internal successors, (102), 21 states have internal predecessors, (102), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 22:34:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 354 transitions. [2021-12-18 22:34:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 22:34:24,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:24,831 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-18 22:34:24,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:25,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:25,048 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1541855194, now seen corresponding path program 1 times [2021-12-18 22:34:25,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:25,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933027211] [2021-12-18 22:34:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:25,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:25,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:25,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:34:25,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:25,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933027211] [2021-12-18 22:34:25,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933027211] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:25,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291337451] [2021-12-18 22:34:25,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:25,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:25,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:25,387 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:34:25,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-18 22:34:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:25,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-18 22:34:25,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:25,759 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:34:25,759 INFO L388 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 [2021-12-18 22:34:25,774 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:34:25,774 INFO L388 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 [2021-12-18 22:34:26,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:34:26,178 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:34:26,179 INFO L388 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 22 [2021-12-18 22:34:26,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:34:26,186 INFO L388 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 19 [2021-12-18 22:34:26,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 22:34:26,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 22:34:26,547 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:34:26,548 INFO L388 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 [2021-12-18 22:34:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:26,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:26,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-18 22:34:26,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291337451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:26,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:26,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 30 [2021-12-18 22:34:26,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648046624] [2021-12-18 22:34:26,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:26,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 22:34:26,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:26,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 22:34:26,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2021-12-18 22:34:26,870 INFO L87 Difference]: Start difference. First operand 316 states and 354 transitions. Second operand has 32 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 26 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:34:29,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:29,172 INFO L93 Difference]: Finished difference Result 343 states and 378 transitions. [2021-12-18 22:34:29,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-18 22:34:29,173 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 26 states have internal predecessors, (112), 6 states have call successors, (6), 5 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 61 [2021-12-18 22:34:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:29,174 INFO L225 Difference]: With dead ends: 343 [2021-12-18 22:34:29,174 INFO L226 Difference]: Without dead ends: 343 [2021-12-18 22:34:29,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=831, Invalid=4719, Unknown=0, NotChecked=0, Total=5550 [2021-12-18 22:34:29,175 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 522 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:29,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 550 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 648 Invalid, 0 Unknown, 472 Unchecked, 0.3s Time] [2021-12-18 22:34:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-18 22:34:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 321. [2021-12-18 22:34:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 297 states have (on average 1.1313131313131313) internal successors, (336), 304 states have internal predecessors, (336), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 359 transitions. [2021-12-18 22:34:29,179 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 359 transitions. Word has length 61 [2021-12-18 22:34:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:29,180 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 359 transitions. [2021-12-18 22:34:29,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 26 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:34:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 359 transitions. [2021-12-18 22:34:29,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 22:34:29,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:29,181 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:34:29,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:29,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:29,382 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:29,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:29,382 INFO L85 PathProgramCache]: Analyzing trace with hash -340935575, now seen corresponding path program 1 times [2021-12-18 22:34:29,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:29,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229083739] [2021-12-18 22:34:29,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:29,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:29,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:29,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:34:29,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:29,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229083739] [2021-12-18 22:34:29,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229083739] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:29,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942865592] [2021-12-18 22:34:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:29,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:29,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:29,758 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:34:29,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-18 22:34:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:29,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 22:34:29,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:30,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 22:34:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 38 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:30,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:30,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 22:34:30,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 22:34:30,319 INFO L388 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 22 treesize of output 22 [2021-12-18 22:34:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 38 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:30,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942865592] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:34:30,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:34:30,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 36 [2021-12-18 22:34:30,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270020924] [2021-12-18 22:34:30,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:30,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 22:34:30,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:30,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 22:34:30,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 22:34:30,444 INFO L87 Difference]: Start difference. First operand 321 states and 359 transitions. Second operand has 36 states, 35 states have (on average 4.228571428571429) internal successors, (148), 29 states have internal predecessors, (148), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 22:34:32,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:32,700 INFO L93 Difference]: Finished difference Result 372 states and 402 transitions. [2021-12-18 22:34:32,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 22:34:32,700 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.228571428571429) internal successors, (148), 29 states have internal predecessors, (148), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 63 [2021-12-18 22:34:32,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:32,701 INFO L225 Difference]: With dead ends: 372 [2021-12-18 22:34:32,701 INFO L226 Difference]: Without dead ends: 372 [2021-12-18 22:34:32,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=904, Invalid=3788, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 22:34:32,702 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1126 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:32,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 462 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 22:34:32,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-12-18 22:34:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 311. [2021-12-18 22:34:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 288 states have (on average 1.1041666666666667) internal successors, (318), 294 states have internal predecessors, (318), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:34:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 341 transitions. [2021-12-18 22:34:32,706 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 341 transitions. Word has length 63 [2021-12-18 22:34:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:32,706 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 341 transitions. [2021-12-18 22:34:32,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.228571428571429) internal successors, (148), 29 states have internal predecessors, (148), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 22:34:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 341 transitions. [2021-12-18 22:34:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 22:34:32,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:32,707 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:34:32,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:32,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-18 22:34:32,920 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:32,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:32,920 INFO L85 PathProgramCache]: Analyzing trace with hash 701075492, now seen corresponding path program 1 times [2021-12-18 22:34:32,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:32,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94495543] [2021-12-18 22:34:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:32,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:32,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 22:34:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:32,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 22:34:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:34:33,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 22:34:33,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94495543] [2021-12-18 22:34:33,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94495543] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:33,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549372375] [2021-12-18 22:34:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:33,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:33,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:33,016 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 22:34:33,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-18 22:34:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:33,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 22:34:33,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:33,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:34:33,247 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 22:34:33,247 INFO L388 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 3 case distinctions, treesize of input 20 treesize of output 21 [2021-12-18 22:34:33,283 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 22:34:33,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 22:34:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:33,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:33,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549372375] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:33,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:33,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-12-18 22:34:33,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786813875] [2021-12-18 22:34:33,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:33,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 22:34:33,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 22:34:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 22:34:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-18 22:34:33,366 INFO L87 Difference]: Start difference. First operand 311 states and 341 transitions. Second operand has 12 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 22:34:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:33,503 INFO L93 Difference]: Finished difference Result 328 states and 355 transitions. [2021-12-18 22:34:33,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 22:34:33,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2021-12-18 22:34:33,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:33,505 INFO L225 Difference]: With dead ends: 328 [2021-12-18 22:34:33,505 INFO L226 Difference]: Without dead ends: 328 [2021-12-18 22:34:33,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 11 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-12-18 22:34:33,505 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 104 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:33,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 148 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 153 Invalid, 0 Unknown, 113 Unchecked, 0.1s Time] [2021-12-18 22:34:33,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-12-18 22:34:33,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 267. [2021-12-18 22:34:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 246 states have (on average 1.0975609756097562) internal successors, (270), 252 states have internal predecessors, (270), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-18 22:34:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 291 transitions. [2021-12-18 22:34:33,508 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 291 transitions. Word has length 66 [2021-12-18 22:34:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:33,509 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 291 transitions. [2021-12-18 22:34:33,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 22:34:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 291 transitions. [2021-12-18 22:34:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-18 22:34:33,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:33,510 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:34:33,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-18 22:34:33,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 22:34:33,723 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:33,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:33,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1953429379, now seen corresponding path program 1 times [2021-12-18 22:34:33,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 22:34:33,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564232685] [2021-12-18 22:34:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:33,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 22:34:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 22:34:33,738 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-18 22:34:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 22:34:33,762 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-18 22:34:33,762 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-18 22:34:33,763 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2021-12-18 22:34:33,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATION (21 of 23 remaining) [2021-12-18 22:34:33,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATION (20 of 23 remaining) [2021-12-18 22:34:33,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2021-12-18 22:34:33,764 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2021-12-18 22:34:33,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2021-12-18 22:34:33,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2021-12-18 22:34:33,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATION (15 of 23 remaining) [2021-12-18 22:34:33,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATION (14 of 23 remaining) [2021-12-18 22:34:33,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATION (13 of 23 remaining) [2021-12-18 22:34:33,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATION (12 of 23 remaining) [2021-12-18 22:34:33,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (11 of 23 remaining) [2021-12-18 22:34:33,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (10 of 23 remaining) [2021-12-18 22:34:33,766 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (9 of 23 remaining) [2021-12-18 22:34:33,766 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (8 of 23 remaining) [2021-12-18 22:34:33,766 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (7 of 23 remaining) [2021-12-18 22:34:33,767 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (6 of 23 remaining) [2021-12-18 22:34:33,767 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (5 of 23 remaining) [2021-12-18 22:34:33,767 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (4 of 23 remaining) [2021-12-18 22:34:33,767 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (3 of 23 remaining) [2021-12-18 22:34:33,767 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE (2 of 23 remaining) [2021-12-18 22:34:33,767 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE (1 of 23 remaining) [2021-12-18 22:34:33,768 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE (0 of 23 remaining) [2021-12-18 22:34:33,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-18 22:34:33,770 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:34:33,773 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 22:34:33,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 10:34:33 BoogieIcfgContainer [2021-12-18 22:34:33,841 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 22:34:33,842 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 22:34:33,842 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 22:34:33,842 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 22:34:33,843 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 10:33:38" (3/4) ... [2021-12-18 22:34:33,845 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-18 22:34:33,845 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 22:34:33,845 INFO L158 Benchmark]: Toolchain (without parser) took 56599.43ms. Allocated memory was 100.7MB in the beginning and 186.6MB in the end (delta: 86.0MB). Free memory was 71.2MB in the beginning and 105.2MB in the end (delta: -34.1MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2021-12-18 22:34:33,845 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory was 57.6MB in the beginning and 57.6MB in the end (delta: 46.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 22:34:33,845 INFO L158 Benchmark]: CACSL2BoogieTranslator took 383.40ms. Allocated memory is still 100.7MB. Free memory was 70.9MB in the beginning and 66.8MB in the end (delta: 4.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-18 22:34:33,846 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.27ms. Allocated memory is still 100.7MB. Free memory was 66.8MB in the beginning and 64.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 22:34:33,846 INFO L158 Benchmark]: Boogie Preprocessor took 38.96ms. Allocated memory is still 100.7MB. Free memory was 64.7MB in the beginning and 63.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 22:34:33,846 INFO L158 Benchmark]: RCFGBuilder took 329.71ms. Allocated memory is still 100.7MB. Free memory was 63.0MB in the beginning and 49.6MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-18 22:34:33,850 INFO L158 Benchmark]: TraceAbstraction took 55791.15ms. Allocated memory was 100.7MB in the beginning and 186.6MB in the end (delta: 86.0MB). Free memory was 49.3MB in the beginning and 105.2MB in the end (delta: -56.0MB). Peak memory consumption was 31.9MB. Max. memory is 16.1GB. [2021-12-18 22:34:33,851 INFO L158 Benchmark]: Witness Printer took 2.83ms. Allocated memory is still 186.6MB. Free memory is still 105.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 22:34:33,851 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory was 57.6MB in the beginning and 57.6MB in the end (delta: 46.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 383.40ms. Allocated memory is still 100.7MB. Free memory was 70.9MB in the beginning and 66.8MB in the end (delta: 4.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.27ms. Allocated memory is still 100.7MB. Free memory was 66.8MB in the beginning and 64.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.96ms. Allocated memory is still 100.7MB. Free memory was 64.7MB in the beginning and 63.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 329.71ms. Allocated memory is still 100.7MB. Free memory was 63.0MB in the beginning and 49.6MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 55791.15ms. Allocated memory was 100.7MB in the beginning and 186.6MB in the end (delta: 86.0MB). Free memory was 49.3MB in the beginning and 105.2MB in the end (delta: -56.0MB). Peak memory consumption was 31.9MB. Max. memory is 16.1GB. * Witness Printer took 2.83ms. Allocated memory is still 186.6MB. Free memory is still 105.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 722]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693, overapproximation of memtrack at line 722. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; VAL [commands={6:0}, global={0:0}, state=0] [L723] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].function={-1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={7:0}, state=1, x={7:0}] [L695] RET commands[i].function() [L723] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L724] CALL parse_input("c1") VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={4:0}, input={4:0}, state=1] [L692] COND FALSE !(i < 2) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={4:0}, input={4:0}, state=1] [L724] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L725] CALL parse_input("c2") VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L692] COND FALSE !(i < 2) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L725] RET parse_input("c2") VAL [commands={6:0}, global={7:0}, state=1] [L726] return 0; VAL [\result=0, commands={6:0}, global={7:0}, state=1] - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 67 locations, 23 error locations. Started 1 CEGAR loops. OverallTime: 55.7s, OverallIterations: 46, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 22.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14473 SdHoareTripleChecker+Valid, 7.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14462 mSDsluCounter, 11353 SdHoareTripleChecker+Invalid, 6.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2810 IncrementalHoareTripleChecker+Unchecked, 9258 mSDsCounter, 2216 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13940 IncrementalHoareTripleChecker+Invalid, 18966 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2216 mSolverCounterUnsat, 2095 mSDtfsCounter, 13940 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3177 GetRequests, 1975 SyntacticMatches, 89 SemanticMatches, 1113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11660 ImplicationChecksByTransitivity, 20.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=645occurred in iteration=21, InterpolantAutomatonStates: 710, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 45 MinimizatonAttempts, 2201 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 22.6s InterpolantComputationTime, 3221 NumberOfCodeBlocks, 3221 NumberOfCodeBlocksAsserted, 83 NumberOfCheckSat, 3534 ConstructedInterpolants, 283 QuantifiedInterpolants, 43852 SizeOfPredicates, 179 NumberOfNonLiveVariables, 9299 ConjunctsInSsa, 718 ConjunctsInUnsatCore, 91 InterpolantComputations, 14 PerfectInterpolantSequences, 949/2086 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-18 22:34:33,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally 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_1.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 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 22:34:35,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 22:34:35,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 22:34:35,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 22:34:35,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 22:34:35,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 22:34:35,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 22:34:35,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 22:34:35,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 22:34:35,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 22:34:35,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 22:34:35,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 22:34:35,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 22:34:35,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 22:34:35,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 22:34:35,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 22:34:35,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 22:34:35,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 22:34:35,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 22:34:35,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 22:34:35,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 22:34:35,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 22:34:35,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 22:34:35,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 22:34:35,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 22:34:35,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 22:34:35,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 22:34:35,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 22:34:35,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 22:34:35,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 22:34:35,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 22:34:35,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 22:34:35,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 22:34:35,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 22:34:35,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 22:34:35,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 22:34:35,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 22:34:35,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 22:34:35,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 22:34:35,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 22:34:35,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 22:34:35,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-18 22:34:35,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 22:34:35,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 22:34:35,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 22:34:35,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 22:34:35,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 22:34:35,600 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 22:34:35,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 22:34:35,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 22:34:35,601 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 22:34:35,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 22:34:35,602 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 22:34:35,602 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 22:34:35,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 22:34:35,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 22:34:35,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 22:34:35,602 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 22:34:35,603 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 22:34:35,603 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 22:34:35,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 22:34:35,603 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 22:34:35,603 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 22:34:35,603 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 22:34:35,604 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 22:34:35,604 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 22:34:35,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 22:34:35,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 22:34:35,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 22:34:35,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 22:34:35,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 22:34:35,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 22:34:35,605 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 22:34:35,605 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 22:34:35,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 22:34:35,606 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 22:34:35,606 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2021-12-18 22:34:35,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 22:34:35,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 22:34:35,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 22:34:35,925 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 22:34:35,926 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 22:34:35,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-12-18 22:34:35,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b1651373/83c74c722df2433490af27bd49f17cc3/FLAG3e8700df0 [2021-12-18 22:34:36,467 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 22:34:36,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-12-18 22:34:36,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b1651373/83c74c722df2433490af27bd49f17cc3/FLAG3e8700df0 [2021-12-18 22:34:36,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b1651373/83c74c722df2433490af27bd49f17cc3 [2021-12-18 22:34:36,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 22:34:36,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 22:34:36,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 22:34:36,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 22:34:36,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 22:34:36,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 10:34:36" (1/1) ... [2021-12-18 22:34:36,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@710db888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:34:36, skipping insertion in model container [2021-12-18 22:34:36,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 10:34:36" (1/1) ... [2021-12-18 22:34:36,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 22:34:37,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 22:34:37,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 22:34:37,335 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 22:34:37,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 22:34:37,413 INFO L208 MainTranslator]: Completed translation [2021-12-18 22:34:37,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:34:37 WrapperNode [2021-12-18 22:34:37,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 22:34:37,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 22:34:37,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 22:34:37,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 22:34:37,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:34:37" (1/1) ... [2021-12-18 22:34:37,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:34:37" (1/1) ... [2021-12-18 22:34:37,470 INFO L137 Inliner]: procedures = 169, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2021-12-18 22:34:37,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 22:34:37,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 22:34:37,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 22:34:37,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 22:34:37,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:34:37" (1/1) ... [2021-12-18 22:34:37,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:34:37" (1/1) ... [2021-12-18 22:34:37,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:34:37" (1/1) ... [2021-12-18 22:34:37,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:34:37" (1/1) ... [2021-12-18 22:34:37,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:34:37" (1/1) ... [2021-12-18 22:34:37,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:34:37" (1/1) ... [2021-12-18 22:34:37,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:34:37" (1/1) ... [2021-12-18 22:34:37,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 22:34:37,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 22:34:37,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 22:34:37,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 22:34:37,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:34:37" (1/1) ... [2021-12-18 22:34:37,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 22:34:37,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 22:34:37,551 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 22:34:37,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 22:34:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-18 22:34:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-12-18 22:34:37,591 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-12-18 22:34:37,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 22:34:37,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 22:34:37,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 22:34:37,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 22:34:37,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 22:34:37,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-18 22:34:37,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 22:34:37,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 22:34:37,690 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 22:34:37,692 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 22:34:37,925 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 22:34:37,929 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 22:34:37,929 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-18 22:34:37,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 10:34:37 BoogieIcfgContainer [2021-12-18 22:34:37,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 22:34:37,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 22:34:37,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 22:34:37,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 22:34:37,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 10:34:36" (1/3) ... [2021-12-18 22:34:37,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3003fea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 10:34:37, skipping insertion in model container [2021-12-18 22:34:37,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 10:34:37" (2/3) ... [2021-12-18 22:34:37,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3003fea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 10:34:37, skipping insertion in model container [2021-12-18 22:34:37,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 10:34:37" (3/3) ... [2021-12-18 22:34:37,935 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2021-12-18 22:34:37,942 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 22:34:37,942 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-12-18 22:34:37,972 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 22:34:37,981 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 22:34:37,981 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-12-18 22:34:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 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) [2021-12-18 22:34:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 22:34:38,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:38,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 22:34:38,002 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:38,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:38,010 INFO L85 PathProgramCache]: Analyzing trace with hash -594954629, now seen corresponding path program 1 times [2021-12-18 22:34:38,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:34:38,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203901208] [2021-12-18 22:34:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:38,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:34:38,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:34:38,056 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) [2021-12-18 22:34:38,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 22:34:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:38,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 22:34:38,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:38,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:34:38,281 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:34:38,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203901208] [2021-12-18 22:34:38,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203901208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:34:38,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:34:38,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-18 22:34:38,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113561064] [2021-12-18 22:34:38,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:34:38,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:34:38,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:34:38,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:34:38,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:34:38,317 INFO L87 Difference]: Start difference. First operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 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) [2021-12-18 22:34:38,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:38,501 INFO L93 Difference]: Finished difference Result 121 states and 139 transitions. [2021-12-18 22:34:38,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:34:38,503 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 [2021-12-18 22:34:38,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:38,509 INFO L225 Difference]: With dead ends: 121 [2021-12-18 22:34:38,509 INFO L226 Difference]: Without dead ends: 117 [2021-12-18 22:34:38,510 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:34:38,512 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 56 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:38,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 109 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 22:34:38,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-18 22:34:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2021-12-18 22:34:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 80 states have internal predecessors, (100), 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) [2021-12-18 22:34:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2021-12-18 22:34:38,551 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 6 [2021-12-18 22:34:38,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:38,551 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2021-12-18 22:34:38,552 INFO L471 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) [2021-12-18 22:34:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2021-12-18 22:34:38,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 22:34:38,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:38,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 22:34:38,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-18 22:34:38,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:34:38,759 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:38,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash -594954628, now seen corresponding path program 1 times [2021-12-18 22:34:38,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:34:38,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228506912] [2021-12-18 22:34:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:38,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:34:38,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:34:38,763 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) [2021-12-18 22:34:38,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 22:34:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:38,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 22:34:38,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:38,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:34:38,894 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:34:38,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228506912] [2021-12-18 22:34:38,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228506912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:34:38,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:34:38,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 22:34:38,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307236160] [2021-12-18 22:34:38,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:34:38,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 22:34:38,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:34:38,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 22:34:38,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 22:34:38,897 INFO L87 Difference]: Start difference. First operand 88 states and 113 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) [2021-12-18 22:34:39,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:39,080 INFO L93 Difference]: Finished difference Result 214 states and 281 transitions. [2021-12-18 22:34:39,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 22:34:39,081 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 [2021-12-18 22:34:39,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:39,082 INFO L225 Difference]: With dead ends: 214 [2021-12-18 22:34:39,082 INFO L226 Difference]: Without dead ends: 214 [2021-12-18 22:34:39,083 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:34:39,083 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 143 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 158 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 [2021-12-18 22:34:39,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 158 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 22:34:39,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-18 22:34:39,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2021-12-18 22:34:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 120 states have (on average 1.7666666666666666) internal successors, (212), 142 states have internal predecessors, (212), 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) [2021-12-18 22:34:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 243 transitions. [2021-12-18 22:34:39,119 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 243 transitions. Word has length 6 [2021-12-18 22:34:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:39,119 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 243 transitions. [2021-12-18 22:34:39,119 INFO L471 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) [2021-12-18 22:34:39,120 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 243 transitions. [2021-12-18 22:34:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 22:34:39,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:39,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:34:39,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-18 22:34:39,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:34:39,329 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:39,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:39,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1263724334, now seen corresponding path program 1 times [2021-12-18 22:34:39,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:34:39,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356070458] [2021-12-18 22:34:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:39,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:34:39,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:34:39,332 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) [2021-12-18 22:34:39,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 22:34:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:39,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 22:34:39,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:39,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:34:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:39,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:34:39,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:34:39,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356070458] [2021-12-18 22:34:39,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356070458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:34:39,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:34:39,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:34:39,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556649132] [2021-12-18 22:34:39,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:34:39,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:34:39,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:34:39,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:34:39,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:34:39,555 INFO L87 Difference]: Start difference. First operand 156 states and 243 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) [2021-12-18 22:34:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:39,777 INFO L93 Difference]: Finished difference Result 247 states and 351 transitions. [2021-12-18 22:34:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:34:39,777 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 [2021-12-18 22:34:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:39,779 INFO L225 Difference]: With dead ends: 247 [2021-12-18 22:34:39,779 INFO L226 Difference]: Without dead ends: 247 [2021-12-18 22:34:39,780 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:34:39,780 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 108 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:39,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 191 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 22:34:39,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-18 22:34:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 159. [2021-12-18 22:34:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.7479674796747968) internal successors, (215), 145 states have internal predecessors, (215), 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) [2021-12-18 22:34:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 246 transitions. [2021-12-18 22:34:39,805 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 246 transitions. Word has length 7 [2021-12-18 22:34:39,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:39,805 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 246 transitions. [2021-12-18 22:34:39,805 INFO L471 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) [2021-12-18 22:34:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 246 transitions. [2021-12-18 22:34:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 22:34:39,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:39,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:34:39,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:40,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:34:40,013 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:40,013 INFO L85 PathProgramCache]: Analyzing trace with hash -520748645, now seen corresponding path program 1 times [2021-12-18 22:34:40,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:34:40,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161522609] [2021-12-18 22:34:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:40,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:34:40,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:34:40,028 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) [2021-12-18 22:34:40,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 22:34:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:40,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 22:34:40,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:40,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:34:40,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:34:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:40,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:34:40,245 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:34:40,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161522609] [2021-12-18 22:34:40,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161522609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:34:40,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:34:40,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:34:40,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980594761] [2021-12-18 22:34:40,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:34:40,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:34:40,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:34:40,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:34:40,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:34:40,248 INFO L87 Difference]: Start difference. First operand 159 states and 246 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) [2021-12-18 22:34:40,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:40,440 INFO L93 Difference]: Finished difference Result 216 states and 282 transitions. [2021-12-18 22:34:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:34:40,441 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 [2021-12-18 22:34:40,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:40,442 INFO L225 Difference]: With dead ends: 216 [2021-12-18 22:34:40,443 INFO L226 Difference]: Without dead ends: 216 [2021-12-18 22:34:40,443 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:34:40,444 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 146 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 210 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 [2021-12-18 22:34:40,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 210 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 22:34:40,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-18 22:34:40,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2021-12-18 22:34:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.7317073170731707) internal successors, (213), 145 states have internal predecessors, (213), 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) [2021-12-18 22:34:40,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 244 transitions. [2021-12-18 22:34:40,456 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 244 transitions. Word has length 8 [2021-12-18 22:34:40,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:40,456 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 244 transitions. [2021-12-18 22:34:40,457 INFO L471 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) [2021-12-18 22:34:40,457 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 244 transitions. [2021-12-18 22:34:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 22:34:40,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:40,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:34:40,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:40,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:34:40,665 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:40,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:40,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1036661236, now seen corresponding path program 1 times [2021-12-18 22:34:40,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:34:40,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179784142] [2021-12-18 22:34:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:40,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:34:40,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:34:40,684 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) [2021-12-18 22:34:40,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 22:34:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:40,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 22:34:40,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:40,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:34:40,789 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:34:40,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179784142] [2021-12-18 22:34:40,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179784142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:34:40,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:34:40,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:34:40,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838324755] [2021-12-18 22:34:40,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:34:40,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:34:40,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:34:40,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:34:40,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:34:40,791 INFO L87 Difference]: Start difference. First operand 159 states and 244 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) [2021-12-18 22:34:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:40,940 INFO L93 Difference]: Finished difference Result 253 states and 346 transitions. [2021-12-18 22:34:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:34:40,940 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 [2021-12-18 22:34:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:40,941 INFO L225 Difference]: With dead ends: 253 [2021-12-18 22:34:40,941 INFO L226 Difference]: Without dead ends: 253 [2021-12-18 22:34:40,942 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:34:40,942 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 147 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:40,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 209 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:34:40,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-18 22:34:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 192. [2021-12-18 22:34:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 177 states have internal predecessors, (259), 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) [2021-12-18 22:34:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 290 transitions. [2021-12-18 22:34:40,950 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 290 transitions. Word has length 9 [2021-12-18 22:34:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:40,951 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 290 transitions. [2021-12-18 22:34:40,951 INFO L471 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) [2021-12-18 22:34:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 290 transitions. [2021-12-18 22:34:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 22:34:40,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:40,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:34:40,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-18 22:34:41,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:34:41,152 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2071727293, now seen corresponding path program 1 times [2021-12-18 22:34:41,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:34:41,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041214901] [2021-12-18 22:34:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:41,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:34:41,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:34:41,154 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) [2021-12-18 22:34:41,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-18 22:34:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:41,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 22:34:41,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:41,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:34:41,280 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:34:41,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041214901] [2021-12-18 22:34:41,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041214901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:34:41,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:34:41,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:34:41,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081748017] [2021-12-18 22:34:41,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:34:41,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 22:34:41,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:34:41,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 22:34:41,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:34:41,282 INFO L87 Difference]: Start difference. First operand 192 states and 290 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) [2021-12-18 22:34:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:41,449 INFO L93 Difference]: Finished difference Result 242 states and 313 transitions. [2021-12-18 22:34:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:34:41,449 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 [2021-12-18 22:34:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:41,451 INFO L225 Difference]: With dead ends: 242 [2021-12-18 22:34:41,451 INFO L226 Difference]: Without dead ends: 242 [2021-12-18 22:34:41,451 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:34:41,452 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 186 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:41,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 207 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:34:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-18 22:34:41,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2021-12-18 22:34:41,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 167 states have (on average 1.6766467065868262) internal successors, (280), 191 states have internal predecessors, (280), 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) [2021-12-18 22:34:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 311 transitions. [2021-12-18 22:34:41,461 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 311 transitions. Word has length 10 [2021-12-18 22:34:41,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:41,462 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 311 transitions. [2021-12-18 22:34:41,462 INFO L471 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) [2021-12-18 22:34:41,462 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 311 transitions. [2021-12-18 22:34:41,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 22:34:41,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:41,462 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:34:41,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:41,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:34:41,671 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:41,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:41,672 INFO L85 PathProgramCache]: Analyzing trace with hash 288674115, now seen corresponding path program 1 times [2021-12-18 22:34:41,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:34:41,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517085675] [2021-12-18 22:34:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:41,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:34:41,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:34:41,674 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) [2021-12-18 22:34:41,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 22:34:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 22:34:41,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:41,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:42,275 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:34:42,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517085675] [2021-12-18 22:34:42,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517085675] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:34:42,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:42,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-12-18 22:34:42,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469370720] [2021-12-18 22:34:42,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:42,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 22:34:42,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:34:42,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 22:34:42,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-18 22:34:42,276 INFO L87 Difference]: Start difference. First operand 206 states and 311 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) [2021-12-18 22:34:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:42,673 INFO L93 Difference]: Finished difference Result 368 states and 497 transitions. [2021-12-18 22:34:42,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 22:34:42,688 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 [2021-12-18 22:34:42,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:42,690 INFO L225 Difference]: With dead ends: 368 [2021-12-18 22:34:42,690 INFO L226 Difference]: Without dead ends: 368 [2021-12-18 22:34:42,690 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:34:42,691 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 444 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:42,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 286 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 22:34:42,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-12-18 22:34:42,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 241. [2021-12-18 22:34:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 200 states have (on average 1.655) internal successors, (331), 226 states have internal predecessors, (331), 9 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2021-12-18 22:34:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 368 transitions. [2021-12-18 22:34:42,714 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 368 transitions. Word has length 14 [2021-12-18 22:34:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:42,714 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 368 transitions. [2021-12-18 22:34:42,715 INFO L471 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) [2021-12-18 22:34:42,715 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 368 transitions. [2021-12-18 22:34:42,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 22:34:42,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:42,716 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:34:42,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:42,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:34:42,920 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:42,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:42,920 INFO L85 PathProgramCache]: Analyzing trace with hash 358962923, now seen corresponding path program 1 times [2021-12-18 22:34:42,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:34:42,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146966613] [2021-12-18 22:34:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:42,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:34:42,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:34:42,922 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) [2021-12-18 22:34:42,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-18 22:34:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:42,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 22:34:42,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:43,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:34:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:43,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:43,285 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:34:43,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146966613] [2021-12-18 22:34:43,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146966613] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:34:43,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:43,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-12-18 22:34:43,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801116726] [2021-12-18 22:34:43,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:43,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:34:43,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:34:43,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:34:43,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-18 22:34:43,286 INFO L87 Difference]: Start difference. First operand 241 states and 368 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) [2021-12-18 22:34:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:43,757 INFO L93 Difference]: Finished difference Result 418 states and 596 transitions. [2021-12-18 22:34:43,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 22:34:43,758 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 [2021-12-18 22:34:43,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:43,760 INFO L225 Difference]: With dead ends: 418 [2021-12-18 22:34:43,760 INFO L226 Difference]: Without dead ends: 418 [2021-12-18 22:34:43,760 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:34:43,761 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 242 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:43,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 449 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 22:34:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-12-18 22:34:43,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 251. [2021-12-18 22:34:43,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 210 states have (on average 1.6476190476190475) internal successors, (346), 236 states have internal predecessors, (346), 9 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2021-12-18 22:34:43,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 383 transitions. [2021-12-18 22:34:43,771 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 383 transitions. Word has length 15 [2021-12-18 22:34:43,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:43,771 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 383 transitions. [2021-12-18 22:34:43,771 INFO L471 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) [2021-12-18 22:34:43,771 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 383 transitions. [2021-12-18 22:34:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 22:34:43,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:43,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:34:43,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:43,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:34:43,981 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:43,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:43,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1757051230, now seen corresponding path program 1 times [2021-12-18 22:34:43,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:34:43,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562388059] [2021-12-18 22:34:43,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:43,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:34:43,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:34:43,984 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) [2021-12-18 22:34:43,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-18 22:34:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:44,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 22:34:44,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:44,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:34:44,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:34:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:44,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:44,475 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:34:44,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562388059] [2021-12-18 22:34:44,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562388059] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:34:44,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:44,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-12-18 22:34:44,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051679759] [2021-12-18 22:34:44,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:44,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:34:44,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:34:44,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:34:44,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-18 22:34:44,476 INFO L87 Difference]: Start difference. First operand 251 states and 383 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) [2021-12-18 22:34:45,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:45,411 INFO L93 Difference]: Finished difference Result 634 states and 850 transitions. [2021-12-18 22:34:45,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 22:34:45,412 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 [2021-12-18 22:34:45,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:45,417 INFO L225 Difference]: With dead ends: 634 [2021-12-18 22:34:45,417 INFO L226 Difference]: Without dead ends: 634 [2021-12-18 22:34:45,417 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:34:45,420 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 606 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:45,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 633 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 22:34:45,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-18 22:34:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 349. [2021-12-18 22:34:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 302 states have (on average 1.6655629139072847) internal successors, (503), 330 states have internal predecessors, (503), 11 states have call successors, (11), 7 states have call predecessors, (11), 13 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2021-12-18 22:34:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 553 transitions. [2021-12-18 22:34:45,442 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 553 transitions. Word has length 16 [2021-12-18 22:34:45,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:45,442 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 553 transitions. [2021-12-18 22:34:45,442 INFO L471 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) [2021-12-18 22:34:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 553 transitions. [2021-12-18 22:34:45,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 22:34:45,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:45,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:34:45,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:45,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:34:45,651 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:45,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:45,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986564, now seen corresponding path program 1 times [2021-12-18 22:34:45,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:34:45,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011274228] [2021-12-18 22:34:45,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:45,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:34:45,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:34:45,663 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) [2021-12-18 22:34:45,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-18 22:34:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:45,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 22:34:45,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:45,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:34:45,734 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:34:45,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011274228] [2021-12-18 22:34:45,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011274228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:34:45,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:34:45,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-18 22:34:45,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040913357] [2021-12-18 22:34:45,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:34:45,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:34:45,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:34:45,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:34:45,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:34:45,736 INFO L87 Difference]: Start difference. First operand 349 states and 553 transitions. Second operand has 3 states, 2 states have (on average 8.5) 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) [2021-12-18 22:34:45,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:45,752 INFO L93 Difference]: Finished difference Result 493 states and 776 transitions. [2021-12-18 22:34:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:34:45,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) 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 [2021-12-18 22:34:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:45,754 INFO L225 Difference]: With dead ends: 493 [2021-12-18 22:34:45,754 INFO L226 Difference]: Without dead ends: 493 [2021-12-18 22:34:45,754 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:34:45,755 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 54 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:45,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 118 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:34:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-12-18 22:34:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 477. [2021-12-18 22:34:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 420 states have (on average 1.6547619047619047) internal successors, (695), 451 states have internal predecessors, (695), 15 states have call successors, (15), 10 states have call predecessors, (15), 19 states have return successors, (64), 15 states have call predecessors, (64), 15 states have call successors, (64) [2021-12-18 22:34:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 774 transitions. [2021-12-18 22:34:45,773 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 774 transitions. Word has length 18 [2021-12-18 22:34:45,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:45,773 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 774 transitions. [2021-12-18 22:34:45,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) 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) [2021-12-18 22:34:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 774 transitions. [2021-12-18 22:34:45,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 22:34:45,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:45,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:34:45,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:45,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:34:45,981 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:45,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:45,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986820, now seen corresponding path program 1 times [2021-12-18 22:34:45,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:34:45,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018960748] [2021-12-18 22:34:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:45,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:34:45,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:34:45,983 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) [2021-12-18 22:34:45,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-18 22:34:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:46,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 22:34:46,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:46,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:34:46,096 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:34:46,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018960748] [2021-12-18 22:34:46,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018960748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:34:46,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:34:46,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 22:34:46,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159308375] [2021-12-18 22:34:46,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:34:46,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:34:46,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:34:46,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:34:46,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:34:46,099 INFO L87 Difference]: Start difference. First operand 477 states and 774 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) [2021-12-18 22:34:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:46,131 INFO L93 Difference]: Finished difference Result 523 states and 806 transitions. [2021-12-18 22:34:46,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:34:46,132 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 [2021-12-18 22:34:46,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:46,134 INFO L225 Difference]: With dead ends: 523 [2021-12-18 22:34:46,134 INFO L226 Difference]: Without dead ends: 523 [2021-12-18 22:34:46,135 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:34:46,135 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 34 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:46,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 120 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:34:46,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-12-18 22:34:46,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 506. [2021-12-18 22:34:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 446 states have (on average 1.6322869955156951) internal successors, (728), 479 states have internal predecessors, (728), 15 states have call successors, (15), 11 states have call predecessors, (15), 22 states have return successors, (58), 15 states have call predecessors, (58), 15 states have call successors, (58) [2021-12-18 22:34:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 801 transitions. [2021-12-18 22:34:46,149 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 801 transitions. Word has length 18 [2021-12-18 22:34:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:46,149 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 801 transitions. [2021-12-18 22:34:46,150 INFO L471 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) [2021-12-18 22:34:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 801 transitions. [2021-12-18 22:34:46,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 22:34:46,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:46,151 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:34:46,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-18 22:34:46,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:34:46,360 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:46,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:46,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2137943300, now seen corresponding path program 1 times [2021-12-18 22:34:46,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:34:46,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005801063] [2021-12-18 22:34:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:46,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:34:46,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:34:46,363 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) [2021-12-18 22:34:46,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-18 22:34:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:46,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 22:34:46,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:46,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:34:46,499 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:34:46,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005801063] [2021-12-18 22:34:46,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005801063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:34:46,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:34:46,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-18 22:34:46,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85399192] [2021-12-18 22:34:46,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:34:46,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:34:46,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:34:46,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:34:46,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:34:46,500 INFO L87 Difference]: Start difference. First operand 506 states and 801 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-12-18 22:34:46,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:46,538 INFO L93 Difference]: Finished difference Result 521 states and 801 transitions. [2021-12-18 22:34:46,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:34:46,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 19 [2021-12-18 22:34:46,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:46,540 INFO L225 Difference]: With dead ends: 521 [2021-12-18 22:34:46,540 INFO L226 Difference]: Without dead ends: 521 [2021-12-18 22:34:46,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:34:46,541 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 31 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:46,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 121 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:34:46,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-12-18 22:34:46,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 506. [2021-12-18 22:34:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 446 states have (on average 1.6233183856502242) internal successors, (724), 479 states have internal predecessors, (724), 15 states have call successors, (15), 11 states have call predecessors, (15), 22 states have return successors, (58), 15 states have call predecessors, (58), 15 states have call successors, (58) [2021-12-18 22:34:46,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 797 transitions. [2021-12-18 22:34:46,550 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 797 transitions. Word has length 19 [2021-12-18 22:34:46,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:46,550 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 797 transitions. [2021-12-18 22:34:46,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-12-18 22:34:46,550 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 797 transitions. [2021-12-18 22:34:46,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 22:34:46,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:46,551 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-18 22:34:46,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-18 22:34:46,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:34:46,758 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:46,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1621609206, now seen corresponding path program 2 times [2021-12-18 22:34:46,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:34:46,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374541399] [2021-12-18 22:34:46,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:34:46,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:34:46,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:34:46,760 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) [2021-12-18 22:34:46,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-18 22:34:46,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:34:46,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:34:46,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 22:34:46,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:47,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:47,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:34:47,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374541399] [2021-12-18 22:34:47,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374541399] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:34:47,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:47,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-12-18 22:34:47,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827653781] [2021-12-18 22:34:47,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:47,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:34:47,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:34:47,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:34:47,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-18 22:34:47,812 INFO L87 Difference]: Start difference. First operand 506 states and 797 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) [2021-12-18 22:34:50,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:50,295 INFO L93 Difference]: Finished difference Result 838 states and 1226 transitions. [2021-12-18 22:34:50,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 22:34:50,296 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 [2021-12-18 22:34:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:50,299 INFO L225 Difference]: With dead ends: 838 [2021-12-18 22:34:50,299 INFO L226 Difference]: Without dead ends: 838 [2021-12-18 22:34:50,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-18 22:34:50,300 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 302 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 22:34:50,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 604 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-18 22:34:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-12-18 22:34:50,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 556. [2021-12-18 22:34:50,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 493 states have (on average 1.6470588235294117) internal successors, (812), 529 states have internal predecessors, (812), 15 states have call successors, (15), 11 states have call predecessors, (15), 25 states have return successors, (55), 15 states have call predecessors, (55), 15 states have call successors, (55) [2021-12-18 22:34:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 882 transitions. [2021-12-18 22:34:50,313 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 882 transitions. Word has length 22 [2021-12-18 22:34:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:50,313 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 882 transitions. [2021-12-18 22:34:50,314 INFO L471 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) [2021-12-18 22:34:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 882 transitions. [2021-12-18 22:34:50,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 22:34:50,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:50,314 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:34:50,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:50,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:34:50,525 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:50,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:50,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1078444150, now seen corresponding path program 1 times [2021-12-18 22:34:50,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:34:50,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696749104] [2021-12-18 22:34:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:50,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:34:50,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:34:50,527 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:34:50,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-18 22:34:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:50,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-18 22:34:50,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:50,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:34:50,624 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:34:50,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696749104] [2021-12-18 22:34:50,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696749104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:34:50,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:34:50,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:34:50,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752059401] [2021-12-18 22:34:50,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:34:50,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:34:50,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:34:50,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:34:50,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:34:50,627 INFO L87 Difference]: Start difference. First operand 556 states and 882 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) [2021-12-18 22:34:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:34:50,633 INFO L93 Difference]: Finished difference Result 400 states and 619 transitions. [2021-12-18 22:34:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:34:50,634 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 [2021-12-18 22:34:50,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:34:50,636 INFO L225 Difference]: With dead ends: 400 [2021-12-18 22:34:50,636 INFO L226 Difference]: Without dead ends: 400 [2021-12-18 22:34:50,636 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:34:50,637 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 13 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 132 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 [2021-12-18 22:34:50,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 132 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:34:50,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-12-18 22:34:50,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2021-12-18 22:34:50,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 349 states have (on average 1.6389684813753582) internal successors, (572), 380 states have internal predecessors, (572), 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) [2021-12-18 22:34:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 619 transitions. [2021-12-18 22:34:50,650 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 619 transitions. Word has length 25 [2021-12-18 22:34:50,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:34:50,651 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 619 transitions. [2021-12-18 22:34:50,651 INFO L471 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) [2021-12-18 22:34:50,651 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 619 transitions. [2021-12-18 22:34:50,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 22:34:50,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:34:50,653 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:34:50,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-18 22:34:50,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:34:50,861 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:34:50,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:34:50,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1446375410, now seen corresponding path program 1 times [2021-12-18 22:34:50,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:34:50,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343822519] [2021-12-18 22:34:50,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:50,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:34:50,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:34:50,875 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) [2021-12-18 22:34:50,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-18 22:34:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:50,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 22:34:50,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:53,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:34:53,314 INFO L388 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 [2021-12-18 22:34:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:53,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:55,686 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:34:55,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343822519] [2021-12-18 22:34:55,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343822519] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:55,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1036700345] [2021-12-18 22:34:55,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:34:55,686 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:34:55,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:34:55,687 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:34:55,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-12-18 22:34:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:34:55,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 22:34:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:34:58,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:34:58,079 INFO L388 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 [2021-12-18 22:34:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:34:58,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:34:58,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1036700345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:34:58,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:34:58,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-12-18 22:34:58,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514828677] [2021-12-18 22:34:58,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:34:58,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 22:34:58,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:34:58,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 22:34:58,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=64, Unknown=2, NotChecked=0, Total=90 [2021-12-18 22:34:58,275 INFO L87 Difference]: Start difference. First operand 400 states and 619 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) [2021-12-18 22:35:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:35:02,635 INFO L93 Difference]: Finished difference Result 697 states and 1004 transitions. [2021-12-18 22:35:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 22:35:02,636 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 [2021-12-18 22:35:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:35:02,638 INFO L225 Difference]: With dead ends: 697 [2021-12-18 22:35:02,638 INFO L226 Difference]: Without dead ends: 697 [2021-12-18 22:35:02,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=74, Invalid=162, Unknown=4, NotChecked=0, Total=240 [2021-12-18 22:35:02,638 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 220 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:35:02,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 273 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2021-12-18 22:35:02,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-12-18 22:35:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 607. [2021-12-18 22:35:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 542 states have (on average 1.5904059040590406) internal successors, (862), 578 states have internal predecessors, (862), 16 states have call successors, (16), 12 states have call predecessors, (16), 26 states have return successors, (59), 16 states have call predecessors, (59), 16 states have call successors, (59) [2021-12-18 22:35:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 937 transitions. [2021-12-18 22:35:02,649 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 937 transitions. Word has length 27 [2021-12-18 22:35:02,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:35:02,649 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 937 transitions. [2021-12-18 22:35:02,649 INFO L471 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) [2021-12-18 22:35:02,649 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 937 transitions. [2021-12-18 22:35:02,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 22:35:02,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:35:02,650 INFO L514 BasicCegarLoop]: 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, 1] [2021-12-18 22:35:02,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-12-18 22:35:02,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-18 22:35:03,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:35:03,050 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:35:03,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:35:03,051 INFO L85 PathProgramCache]: Analyzing trace with hash 308487171, now seen corresponding path program 1 times [2021-12-18 22:35:03,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:35:03,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220548637] [2021-12-18 22:35:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:03,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:35:03,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:35:03,052 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) [2021-12-18 22:35:03,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-18 22:35:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:03,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 22:35:03,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:03,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:35:03,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:35:03,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220548637] [2021-12-18 22:35:03,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220548637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:35:03,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:35:03,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 22:35:03,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076685846] [2021-12-18 22:35:03,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:35:03,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 22:35:03,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:35:03,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 22:35:03,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-18 22:35:03,266 INFO L87 Difference]: Start difference. First operand 607 states and 937 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) [2021-12-18 22:35:03,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:35:03,406 INFO L93 Difference]: Finished difference Result 560 states and 812 transitions. [2021-12-18 22:35:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 22:35:03,406 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 [2021-12-18 22:35:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:35:03,408 INFO L225 Difference]: With dead ends: 560 [2021-12-18 22:35:03,408 INFO L226 Difference]: Without dead ends: 560 [2021-12-18 22:35:03,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-12-18 22:35:03,409 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 133 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:35:03,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 215 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:35:03,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-12-18 22:35:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 488. [2021-12-18 22:35:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 432 states have (on average 1.5648148148148149) internal successors, (676), 464 states have internal predecessors, (676), 13 states have call successors, (13), 10 states have call predecessors, (13), 20 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2021-12-18 22:35:03,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 732 transitions. [2021-12-18 22:35:03,419 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 732 transitions. Word has length 28 [2021-12-18 22:35:03,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:35:03,419 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 732 transitions. [2021-12-18 22:35:03,419 INFO L471 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) [2021-12-18 22:35:03,420 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 732 transitions. [2021-12-18 22:35:03,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 22:35:03,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:35:03,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:35:03,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-18 22:35:03,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:35:03,629 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:35:03,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:35:03,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1602633389, now seen corresponding path program 1 times [2021-12-18 22:35:03,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:35:03,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516114202] [2021-12-18 22:35:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:03,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:35:03,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:35:03,631 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:35:03,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-18 22:35:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:03,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 22:35:03,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:06,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:35:06,114 INFO L388 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 [2021-12-18 22:35:06,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:35:06,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:35:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:06,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:35:08,447 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:35:08,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516114202] [2021-12-18 22:35:08,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516114202] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:35:08,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [974532993] [2021-12-18 22:35:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:08,448 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:35:08,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:35:08,449 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:35:08,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-18 22:35:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:08,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 22:35:08,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:13,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:35:13,011 INFO L388 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 [2021-12-18 22:35:13,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:35:13,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:35:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:13,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:35:15,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [974532993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:35:15,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:35:15,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-12-18 22:35:15,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904658242] [2021-12-18 22:35:15,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:35:15,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 22:35:15,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:35:15,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 22:35:15,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2021-12-18 22:35:15,313 INFO L87 Difference]: Start difference. First operand 488 states and 732 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) [2021-12-18 22:35:21,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:35:21,865 INFO L93 Difference]: Finished difference Result 567 states and 795 transitions. [2021-12-18 22:35:21,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 22:35:21,865 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 [2021-12-18 22:35:21,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:35:21,867 INFO L225 Difference]: With dead ends: 567 [2021-12-18 22:35:21,867 INFO L226 Difference]: Without dead ends: 567 [2021-12-18 22:35:21,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2021-12-18 22:35:21,868 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 244 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:35:21,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 286 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 194 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2021-12-18 22:35:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-12-18 22:35:21,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 489. [2021-12-18 22:35:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 433 states have (on average 1.5588914549653579) internal successors, (675), 465 states have internal predecessors, (675), 13 states have call successors, (13), 10 states have call predecessors, (13), 20 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2021-12-18 22:35:21,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 731 transitions. [2021-12-18 22:35:21,877 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 731 transitions. Word has length 29 [2021-12-18 22:35:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:35:21,877 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 731 transitions. [2021-12-18 22:35:21,877 INFO L471 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) [2021-12-18 22:35:21,877 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 731 transitions. [2021-12-18 22:35:21,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 22:35:21,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:35:21,878 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:35:21,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-12-18 22:35:22,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-18 22:35:22,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:35:22,281 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:35:22,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:35:22,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1857972446, now seen corresponding path program 1 times [2021-12-18 22:35:22,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:35:22,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222944173] [2021-12-18 22:35:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:22,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:35:22,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:35:22,282 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:35:22,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-18 22:35:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:22,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 22:35:22,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:22,485 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 22:35:22,485 INFO L388 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 14 treesize of output 19 [2021-12-18 22:35:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:22,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:35:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:22,763 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:35:22,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222944173] [2021-12-18 22:35:22,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222944173] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:35:22,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:35:22,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-12-18 22:35:22,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007572042] [2021-12-18 22:35:22,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:35:22,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:35:22,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:35:22,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:35:22,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-18 22:35:22,764 INFO L87 Difference]: Start difference. First operand 489 states and 731 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 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) [2021-12-18 22:35:23,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:35:23,102 INFO L93 Difference]: Finished difference Result 613 states and 857 transitions. [2021-12-18 22:35:23,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 22:35:23,103 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), 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 30 [2021-12-18 22:35:23,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:35:23,105 INFO L225 Difference]: With dead ends: 613 [2021-12-18 22:35:23,105 INFO L226 Difference]: Without dead ends: 613 [2021-12-18 22:35:23,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-12-18 22:35:23,106 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 417 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:35:23,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 252 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 141 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2021-12-18 22:35:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-12-18 22:35:23,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 575. [2021-12-18 22:35:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 516 states have (on average 1.494186046511628) internal successors, (771), 549 states have internal predecessors, (771), 13 states have call successors, (13), 12 states have call predecessors, (13), 23 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2021-12-18 22:35:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 827 transitions. [2021-12-18 22:35:23,116 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 827 transitions. Word has length 30 [2021-12-18 22:35:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:35:23,117 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 827 transitions. [2021-12-18 22:35:23,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 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) [2021-12-18 22:35:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 827 transitions. [2021-12-18 22:35:23,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 22:35:23,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:35:23,117 INFO L514 BasicCegarLoop]: 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, 1, 1] [2021-12-18 22:35:23,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-18 22:35:23,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:35:23,326 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:35:23,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:35:23,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1762570929, now seen corresponding path program 1 times [2021-12-18 22:35:23,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:35:23,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760356477] [2021-12-18 22:35:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:23,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:35:23,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:35:23,327 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) [2021-12-18 22:35:23,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-18 22:35:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:23,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 22:35:23,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:23,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:35:23,626 INFO L388 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 [2021-12-18 22:35:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:23,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:35:23,872 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:35:23,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760356477] [2021-12-18 22:35:23,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760356477] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:35:23,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [392847] [2021-12-18 22:35:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:23,873 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:35:23,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:35:23,874 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:35:23,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-12-18 22:35:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:24,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 22:35:24,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:24,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:35:24,200 INFO L388 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 [2021-12-18 22:35:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:24,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:35:24,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [392847] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:35:24,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:35:24,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-18 22:35:24,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499007081] [2021-12-18 22:35:24,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:35:24,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 22:35:24,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:35:24,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 22:35:24,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-18 22:35:24,360 INFO L87 Difference]: Start difference. First operand 575 states and 827 transitions. Second operand has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 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) [2021-12-18 22:35:26,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:35:26,823 INFO L93 Difference]: Finished difference Result 735 states and 974 transitions. [2021-12-18 22:35:26,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 22:35:26,824 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 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 31 [2021-12-18 22:35:26,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:35:26,826 INFO L225 Difference]: With dead ends: 735 [2021-12-18 22:35:26,826 INFO L226 Difference]: Without dead ends: 735 [2021-12-18 22:35:26,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=111, Invalid=268, Unknown=1, NotChecked=0, Total=380 [2021-12-18 22:35:26,827 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 305 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:35:26,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 304 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 173 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2021-12-18 22:35:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-12-18 22:35:26,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 670. [2021-12-18 22:35:26,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 608 states have (on average 1.4638157894736843) internal successors, (890), 643 states have internal predecessors, (890), 13 states have call successors, (13), 13 states have call predecessors, (13), 26 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2021-12-18 22:35:26,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 941 transitions. [2021-12-18 22:35:26,837 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 941 transitions. Word has length 31 [2021-12-18 22:35:26,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:35:26,837 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 941 transitions. [2021-12-18 22:35:26,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 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) [2021-12-18 22:35:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 941 transitions. [2021-12-18 22:35:26,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-18 22:35:26,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:35:26,838 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:35:26,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-18 22:35:27,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-12-18 22:35:27,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:35:27,247 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:35:27,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:35:27,247 INFO L85 PathProgramCache]: Analyzing trace with hash -132941611, now seen corresponding path program 1 times [2021-12-18 22:35:27,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:35:27,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021563397] [2021-12-18 22:35:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:27,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:35:27,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:35:27,249 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) [2021-12-18 22:35:27,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-18 22:35:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:27,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 22:35:27,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:29,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:35:29,616 INFO L388 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 [2021-12-18 22:35:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:29,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:35:30,508 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:35:30,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021563397] [2021-12-18 22:35:30,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021563397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:35:30,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [607515231] [2021-12-18 22:35:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:30,509 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:35:30,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:35:30,509 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:35:30,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-12-18 22:35:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:30,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 22:35:30,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:32,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:35:32,896 INFO L388 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 [2021-12-18 22:35:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:32,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:35:35,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [607515231] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:35:35,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:35:35,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-18 22:35:35,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33969346] [2021-12-18 22:35:35,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:35:35,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 22:35:35,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:35:35,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 22:35:35,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=99, Unknown=1, NotChecked=0, Total=132 [2021-12-18 22:35:35,409 INFO L87 Difference]: Start difference. First operand 670 states and 941 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) [2021-12-18 22:35:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:35:39,820 INFO L93 Difference]: Finished difference Result 924 states and 1228 transitions. [2021-12-18 22:35:39,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 22:35:39,821 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 [2021-12-18 22:35:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:35:39,823 INFO L225 Difference]: With dead ends: 924 [2021-12-18 22:35:39,823 INFO L226 Difference]: Without dead ends: 924 [2021-12-18 22:35:39,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=106, Invalid=271, Unknown=3, NotChecked=0, Total=380 [2021-12-18 22:35:39,824 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 320 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:35:39,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 320 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 190 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2021-12-18 22:35:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-12-18 22:35:39,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 757. [2021-12-18 22:35:39,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 692 states have (on average 1.4609826589595376) internal successors, (1011), 728 states have internal predecessors, (1011), 14 states have call successors, (14), 14 states have call predecessors, (14), 28 states have return successors, (39), 14 states have call predecessors, (39), 14 states have call successors, (39) [2021-12-18 22:35:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1064 transitions. [2021-12-18 22:35:39,834 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1064 transitions. Word has length 35 [2021-12-18 22:35:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:35:39,834 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 1064 transitions. [2021-12-18 22:35:39,834 INFO L471 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) [2021-12-18 22:35:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1064 transitions. [2021-12-18 22:35:39,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 22:35:39,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:35:39,835 INFO L514 BasicCegarLoop]: 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, 1] [2021-12-18 22:35:39,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-12-18 22:35:40,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-18 22:35:40,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:35:40,238 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:35:40,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:35:40,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1525473162, now seen corresponding path program 1 times [2021-12-18 22:35:40,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:35:40,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371402456] [2021-12-18 22:35:40,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:40,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:35:40,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:35:40,240 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) [2021-12-18 22:35:40,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-18 22:35:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:40,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 22:35:40,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:40,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-18 22:35:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:40,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:35:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:41,235 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:35:41,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371402456] [2021-12-18 22:35:41,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371402456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:35:41,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:35:41,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-18 22:35:41,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048571677] [2021-12-18 22:35:41,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:35:41,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 22:35:41,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:35:41,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 22:35:41,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-12-18 22:35:41,236 INFO L87 Difference]: Start difference. First operand 757 states and 1064 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 3 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) [2021-12-18 22:35:42,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:35:42,081 INFO L93 Difference]: Finished difference Result 780 states and 1062 transitions. [2021-12-18 22:35:42,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 22:35:42,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 3 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 36 [2021-12-18 22:35:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:35:42,084 INFO L225 Difference]: With dead ends: 780 [2021-12-18 22:35:42,085 INFO L226 Difference]: Without dead ends: 780 [2021-12-18 22:35:42,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-12-18 22:35:42,085 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 314 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 22:35:42,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 617 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 22:35:42,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-12-18 22:35:42,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 556. [2021-12-18 22:35:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 505 states have (on average 1.495049504950495) internal successors, (755), 535 states have internal predecessors, (755), 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) [2021-12-18 22:35:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 791 transitions. [2021-12-18 22:35:42,095 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 791 transitions. Word has length 36 [2021-12-18 22:35:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:35:42,095 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 791 transitions. [2021-12-18 22:35:42,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 3 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) [2021-12-18 22:35:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 791 transitions. [2021-12-18 22:35:42,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 22:35:42,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:35:42,096 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:35:42,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-18 22:35:42,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:35:42,303 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:35:42,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:35:42,303 INFO L85 PathProgramCache]: Analyzing trace with hash 634414932, now seen corresponding path program 1 times [2021-12-18 22:35:42,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:35:42,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448877230] [2021-12-18 22:35:42,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:42,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:35:42,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:35:42,305 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) [2021-12-18 22:35:42,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-18 22:35:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:42,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 22:35:42,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:42,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:35:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:42,507 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:35:42,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448877230] [2021-12-18 22:35:42,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448877230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:35:42,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:35:42,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-12-18 22:35:42,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733338626] [2021-12-18 22:35:42,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:35:42,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 22:35:42,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:35:42,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 22:35:42,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 22:35:42,509 INFO L87 Difference]: Start difference. First operand 556 states and 791 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) [2021-12-18 22:35:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:35:42,532 INFO L93 Difference]: Finished difference Result 566 states and 793 transitions. [2021-12-18 22:35:42,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 22:35:42,534 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 [2021-12-18 22:35:42,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:35:42,535 INFO L225 Difference]: With dead ends: 566 [2021-12-18 22:35:42,536 INFO L226 Difference]: Without dead ends: 566 [2021-12-18 22:35:42,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:35:42,536 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 56 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 22:35:42,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 116 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:35:42,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-12-18 22:35:42,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 552. [2021-12-18 22:35:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 504 states have (on average 1.4742063492063493) internal successors, (743), 531 states have internal predecessors, (743), 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) [2021-12-18 22:35:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 779 transitions. [2021-12-18 22:35:42,543 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 779 transitions. Word has length 40 [2021-12-18 22:35:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:35:42,544 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 779 transitions. [2021-12-18 22:35:42,544 INFO L471 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) [2021-12-18 22:35:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 779 transitions. [2021-12-18 22:35:42,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 22:35:42,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:35:42,544 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:35:42,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-18 22:35:42,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:35:42,751 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:35:42,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:35:42,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1807973484, now seen corresponding path program 1 times [2021-12-18 22:35:42,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:35:42,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753690384] [2021-12-18 22:35:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:42,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:35:42,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:35:42,753 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:35:42,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-18 22:35:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:42,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 22:35:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:42,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:35:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:43,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:35:43,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753690384] [2021-12-18 22:35:43,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753690384] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:35:43,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:35:43,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-12-18 22:35:43,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078896507] [2021-12-18 22:35:43,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:35:43,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 22:35:43,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:35:43,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 22:35:43,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 22:35:43,095 INFO L87 Difference]: Start difference. First operand 552 states and 779 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) [2021-12-18 22:35:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:35:43,215 INFO L93 Difference]: Finished difference Result 498 states and 677 transitions. [2021-12-18 22:35:43,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 22:35:43,215 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 [2021-12-18 22:35:43,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:35:43,217 INFO L225 Difference]: With dead ends: 498 [2021-12-18 22:35:43,217 INFO L226 Difference]: Without dead ends: 498 [2021-12-18 22:35:43,217 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:35:43,218 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 75 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:35:43,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 202 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:35:43,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-12-18 22:35:43,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 466. [2021-12-18 22:35:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 426 states have (on average 1.4553990610328638) internal successors, (620), 447 states have internal predecessors, (620), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-12-18 22:35:43,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 648 transitions. [2021-12-18 22:35:43,226 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 648 transitions. Word has length 41 [2021-12-18 22:35:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:35:43,226 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 648 transitions. [2021-12-18 22:35:43,227 INFO L471 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) [2021-12-18 22:35:43,227 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 648 transitions. [2021-12-18 22:35:43,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 22:35:43,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:35:43,227 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:35:43,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-18 22:35:43,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:35:43,435 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:35:43,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:35:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash -212603050, now seen corresponding path program 1 times [2021-12-18 22:35:43,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:35:43,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995534994] [2021-12-18 22:35:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:43,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:35:43,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:35:43,436 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) [2021-12-18 22:35:43,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-18 22:35:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:43,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 22:35:43,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:43,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:35:43,639 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 22:35:43,640 INFO L388 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 15 treesize of output 20 [2021-12-18 22:35:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:43,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:35:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:35:43,803 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:35:43,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995534994] [2021-12-18 22:35:43,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995534994] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:35:43,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:35:43,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-12-18 22:35:43,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327294610] [2021-12-18 22:35:43,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:35:43,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 22:35:43,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:35:43,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 22:35:43,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 22:35:43,805 INFO L87 Difference]: Start difference. First operand 466 states and 648 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) [2021-12-18 22:35:43,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:35:43,946 INFO L93 Difference]: Finished difference Result 493 states and 660 transitions. [2021-12-18 22:35:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:35:43,946 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 [2021-12-18 22:35:43,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:35:43,947 INFO L225 Difference]: With dead ends: 493 [2021-12-18 22:35:43,948 INFO L226 Difference]: Without dead ends: 493 [2021-12-18 22:35:43,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 22:35:43,948 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 37 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:35:43,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 148 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:35:43,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-12-18 22:35:43,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 474. [2021-12-18 22:35:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 434 states have (on average 1.4377880184331797) internal successors, (624), 455 states have internal predecessors, (624), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-12-18 22:35:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 652 transitions. [2021-12-18 22:35:43,955 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 652 transitions. Word has length 42 [2021-12-18 22:35:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:35:43,955 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 652 transitions. [2021-12-18 22:35:43,955 INFO L471 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) [2021-12-18 22:35:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 652 transitions. [2021-12-18 22:35:43,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 22:35:43,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:35:43,956 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:35:43,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-18 22:35:44,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:35:44,164 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:35:44,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:35:44,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2034116786, now seen corresponding path program 1 times [2021-12-18 22:35:44,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:35:44,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626919117] [2021-12-18 22:35:44,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:44,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:35:44,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:35:44,173 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) [2021-12-18 22:35:44,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-18 22:35:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:44,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 22:35:44,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:35:44,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:35:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:35:44,410 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:35:44,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626919117] [2021-12-18 22:35:44,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626919117] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:35:44,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:35:44,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-18 22:35:44,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838490972] [2021-12-18 22:35:44,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:35:44,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 22:35:44,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:35:44,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 22:35:44,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-18 22:35:44,411 INFO L87 Difference]: Start difference. First operand 474 states and 652 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) [2021-12-18 22:35:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:35:44,522 INFO L93 Difference]: Finished difference Result 384 states and 472 transitions. [2021-12-18 22:35:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:35:44,523 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 [2021-12-18 22:35:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:35:44,524 INFO L225 Difference]: With dead ends: 384 [2021-12-18 22:35:44,524 INFO L226 Difference]: Without dead ends: 384 [2021-12-18 22:35:44,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-18 22:35:44,529 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 124 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:35:44,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 295 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:35:44,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-12-18 22:35:44,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 349. [2021-12-18 22:35:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 312 states have (on average 1.3397435897435896) internal successors, (418), 332 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) [2021-12-18 22:35:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 442 transitions. [2021-12-18 22:35:44,540 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 442 transitions. Word has length 44 [2021-12-18 22:35:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:35:44,541 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 442 transitions. [2021-12-18 22:35:44,541 INFO L471 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) [2021-12-18 22:35:44,541 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 442 transitions. [2021-12-18 22:35:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 22:35:44,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:35:44,541 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:35:44,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-18 22:35:44,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:35:44,742 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:35:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:35:44,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1418260067, now seen corresponding path program 1 times [2021-12-18 22:35:44,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:35:44,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949652080] [2021-12-18 22:35:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:44,743 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:35:44,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:35:44,744 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:35:44,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-18 22:35:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:44,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 22:35:44,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-18 22:35:44,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:35:44,871 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:35:44,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949652080] [2021-12-18 22:35:44,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949652080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:35:44,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:35:44,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 22:35:44,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237684144] [2021-12-18 22:35:44,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:35:44,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:35:44,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:35:44,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:35:44,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:35:44,873 INFO L87 Difference]: Start difference. First operand 349 states and 442 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) [2021-12-18 22:35:44,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:35:44,876 INFO L93 Difference]: Finished difference Result 323 states and 395 transitions. [2021-12-18 22:35:44,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:35:44,876 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 [2021-12-18 22:35:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:35:44,877 INFO L225 Difference]: With dead ends: 323 [2021-12-18 22:35:44,877 INFO L226 Difference]: Without dead ends: 323 [2021-12-18 22:35:44,877 INFO L932 BasicCegarLoop]: 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 [2021-12-18 22:35:44,878 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 108 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 [2021-12-18 22:35:44,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 108 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 22:35:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-18 22:35:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 315. [2021-12-18 22:35:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 282 states have (on average 1.2872340425531914) internal successors, (363), 298 states have internal predecessors, (363), 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) [2021-12-18 22:35:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 387 transitions. [2021-12-18 22:35:44,883 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 387 transitions. Word has length 47 [2021-12-18 22:35:44,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:35:44,883 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 387 transitions. [2021-12-18 22:35:44,883 INFO L471 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) [2021-12-18 22:35:44,883 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 387 transitions. [2021-12-18 22:35:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 22:35:44,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:35:44,884 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:35:44,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-18 22:35:45,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:35:45,110 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:35:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:35:45,110 INFO L85 PathProgramCache]: Analyzing trace with hash -377504153, now seen corresponding path program 1 times [2021-12-18 22:35:45,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:35:45,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648099428] [2021-12-18 22:35:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:45,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:35:45,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:35:45,112 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) [2021-12-18 22:35:45,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-18 22:35:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:45,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 22:35:45,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:47,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:35:47,726 INFO L388 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 [2021-12-18 22:35:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 22:35:47,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:35:50,136 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:35:50,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648099428] [2021-12-18 22:35:50,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648099428] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:35:50,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [615669300] [2021-12-18 22:35:50,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:50,137 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:35:50,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:35:50,138 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:35:50,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-12-18 22:35:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:35:50,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 22:35:50,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:35:52,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:35:52,836 INFO L388 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 [2021-12-18 22:35:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 22:35:52,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:35:55,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [615669300] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:35:55,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:35:55,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-12-18 22:35:55,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797967011] [2021-12-18 22:35:55,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:35:55,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 22:35:55,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:35:55,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 22:35:55,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2021-12-18 22:35:55,083 INFO L87 Difference]: Start difference. First operand 315 states and 387 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) [2021-12-18 22:35:59,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:35:59,531 INFO L93 Difference]: Finished difference Result 350 states and 406 transitions. [2021-12-18 22:35:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 22:35:59,532 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 [2021-12-18 22:35:59,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:35:59,533 INFO L225 Difference]: With dead ends: 350 [2021-12-18 22:35:59,533 INFO L226 Difference]: Without dead ends: 350 [2021-12-18 22:35:59,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=117, Invalid=259, Unknown=4, NotChecked=0, Total=380 [2021-12-18 22:35:59,533 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 189 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:35:59,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 258 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 161 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2021-12-18 22:35:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-18 22:35:59,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 314. [2021-12-18 22:35:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 281 states have (on average 1.2775800711743772) internal successors, (359), 297 states have internal predecessors, (359), 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) [2021-12-18 22:35:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 383 transitions. [2021-12-18 22:35:59,537 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 383 transitions. Word has length 48 [2021-12-18 22:35:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:35:59,537 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 383 transitions. [2021-12-18 22:35:59,538 INFO L471 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) [2021-12-18 22:35:59,538 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 383 transitions. [2021-12-18 22:35:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 22:35:59,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:35:59,538 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:35:59,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-12-18 22:35:59,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-12-18 22:35:59,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:35:59,950 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:35:59,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:35:59,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2004239674, now seen corresponding path program 1 times [2021-12-18 22:35:59,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:35:59,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293582999] [2021-12-18 22:35:59,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:35:59,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:35:59,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:35:59,952 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) [2021-12-18 22:35:59,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-18 22:36:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:36:00,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 22:36:00,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:36:04,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:36:04,768 INFO L388 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 [2021-12-18 22:36:04,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:36:04,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:36:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 22:36:04,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:36:07,168 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:36:07,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293582999] [2021-12-18 22:36:07,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293582999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:36:07,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [91417420] [2021-12-18 22:36:07,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:36:07,169 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:36:07,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:36:07,169 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) [2021-12-18 22:36:07,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-12-18 22:36:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:36:07,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 22:36:07,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:36:12,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:36:12,009 INFO L388 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 [2021-12-18 22:36:12,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:36:12,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:36:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 22:36:12,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:36:14,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [91417420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:36:14,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:36:14,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-12-18 22:36:14,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729680287] [2021-12-18 22:36:14,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:36:14,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 22:36:14,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:36:14,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 22:36:14,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2021-12-18 22:36:14,225 INFO L87 Difference]: Start difference. First operand 314 states and 383 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) [2021-12-18 22:36:20,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:36:20,682 INFO L93 Difference]: Finished difference Result 343 states and 403 transitions. [2021-12-18 22:36:20,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 22:36:20,682 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 [2021-12-18 22:36:20,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:36:20,683 INFO L225 Difference]: With dead ends: 343 [2021-12-18 22:36:20,683 INFO L226 Difference]: Without dead ends: 343 [2021-12-18 22:36:20,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2021-12-18 22:36:20,684 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 131 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:36:20,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 289 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 189 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2021-12-18 22:36:20,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-18 22:36:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 314. [2021-12-18 22:36:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 281 states have (on average 1.2740213523131672) internal successors, (358), 297 states have internal predecessors, (358), 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) [2021-12-18 22:36:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 382 transitions. [2021-12-18 22:36:20,688 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 382 transitions. Word has length 50 [2021-12-18 22:36:20,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:36:20,688 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 382 transitions. [2021-12-18 22:36:20,688 INFO L471 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) [2021-12-18 22:36:20,688 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 382 transitions. [2021-12-18 22:36:20,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 22:36:20,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:36:20,689 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:36:20,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-18 22:36:20,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-12-18 22:36:21,102 WARN L452 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 [2021-12-18 22:36:21,103 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:36:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:36:21,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001345, now seen corresponding path program 1 times [2021-12-18 22:36:21,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:36:21,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510028785] [2021-12-18 22:36:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:36:21,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:36:21,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:36:21,104 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) [2021-12-18 22:36:21,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-18 22:36:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:36:21,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 22:36:21,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:36:21,350 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:36:21,351 INFO L388 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 19 treesize of output 26 [2021-12-18 22:36:23,768 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-12-18 22:36:23,768 INFO L388 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 30 treesize of output 44 [2021-12-18 22:36:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:36:23,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:36:23,932 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:36:23,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510028785] [2021-12-18 22:36:23,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510028785] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:36:23,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [576771614] [2021-12-18 22:36:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:36:23,932 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:36:23,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:36:23,938 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:36:23,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-12-18 22:36:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:36:24,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 22:36:24,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:36:24,336 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 22:36:24,336 INFO L388 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 2 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 22:36:24,493 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:36:24,493 INFO L388 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 19 treesize of output 26 [2021-12-18 22:36:24,562 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-18 22:36:24,563 INFO L388 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 14 treesize of output 23 [2021-12-18 22:36:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:36:24,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:36:24,711 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:36:24,711 INFO L388 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 66 treesize of output 63 [2021-12-18 22:36:26,949 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:36:26,949 INFO L388 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 66 treesize of output 63 [2021-12-18 22:36:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:36:27,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [576771614] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:36:27,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 22:36:27,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2021-12-18 22:36:27,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089773950] [2021-12-18 22:36:27,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 22:36:27,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 22:36:27,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:36:27,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 22:36:27,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=620, Unknown=2, NotChecked=0, Total=756 [2021-12-18 22:36:27,250 INFO L87 Difference]: Start difference. First operand 314 states and 382 transitions. Second operand has 27 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 23 states have internal predecessors, (123), 6 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:36:34,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:36:34,269 INFO L93 Difference]: Finished difference Result 363 states and 408 transitions. [2021-12-18 22:36:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 22:36:34,270 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 23 states have internal predecessors, (123), 6 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2021-12-18 22:36:34,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:36:34,271 INFO L225 Difference]: With dead ends: 363 [2021-12-18 22:36:34,271 INFO L226 Difference]: Without dead ends: 363 [2021-12-18 22:36:34,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 133 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=426, Invalid=1375, Unknown=5, NotChecked=0, Total=1806 [2021-12-18 22:36:34,272 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 559 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 22:36:34,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 422 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 279 Invalid, 0 Unknown, 222 Unchecked, 0.5s Time] [2021-12-18 22:36:34,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-12-18 22:36:34,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 321. [2021-12-18 22:36:34,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 291 states have (on average 1.2405498281786942) internal successors, (361), 304 states have internal predecessors, (361), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:36:34,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 384 transitions. [2021-12-18 22:36:34,276 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 384 transitions. Word has length 51 [2021-12-18 22:36:34,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:36:34,276 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 384 transitions. [2021-12-18 22:36:34,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 23 states have internal predecessors, (123), 6 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 22:36:34,276 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 384 transitions. [2021-12-18 22:36:34,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 22:36:34,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:36:34,277 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:36:34,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-12-18 22:36:34,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-12-18 22:36:34,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:36:34,681 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:36:34,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:36:34,681 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001344, now seen corresponding path program 1 times [2021-12-18 22:36:34,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:36:34,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988328618] [2021-12-18 22:36:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:36:34,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:36:34,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:36:34,683 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:36:34,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-18 22:36:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:36:34,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 22:36:34,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:36:37,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:36:37,106 INFO L388 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 [2021-12-18 22:36:39,289 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:36:39,290 INFO L388 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 13 [2021-12-18 22:36:39,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:36:39,734 INFO L388 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 [2021-12-18 22:36:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:36:39,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:36:40,036 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:36:40,036 INFO L388 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 14 [2021-12-18 22:36:42,482 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:36:42,482 INFO L388 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 14 [2021-12-18 22:36:44,891 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:36:44,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988328618] [2021-12-18 22:36:44,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988328618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:36:44,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2496398] [2021-12-18 22:36:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:36:44,892 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:36:44,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:36:44,892 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:36:44,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-12-18 22:36:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:36:45,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 22:36:45,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:36:47,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:36:47,382 INFO L388 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 [2021-12-18 22:36:47,508 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:36:47,508 INFO L388 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 13 [2021-12-18 22:36:48,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:36:48,036 INFO L388 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 [2021-12-18 22:36:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:36:48,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:36:48,219 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:36:48,220 INFO L388 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 14 [2021-12-18 22:36:50,620 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:36:50,620 INFO L388 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 14 [2021-12-18 22:36:53,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2496398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:36:53,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:36:53,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-18 22:36:53,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204439544] [2021-12-18 22:36:53,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:36:53,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:36:53,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:36:53,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:36:53,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=156, Unknown=4, NotChecked=0, Total=210 [2021-12-18 22:36:53,051 INFO L87 Difference]: Start difference. First operand 321 states and 384 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) [2021-12-18 22:36:59,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:36:59,462 INFO L93 Difference]: Finished difference Result 358 states and 414 transitions. [2021-12-18 22:36:59,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 22:36:59,462 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 [2021-12-18 22:36:59,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:36:59,463 INFO L225 Difference]: With dead ends: 358 [2021-12-18 22:36:59,463 INFO L226 Difference]: Without dead ends: 358 [2021-12-18 22:36:59,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 137 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=133, Invalid=322, Unknown=7, NotChecked=0, Total=462 [2021-12-18 22:36:59,464 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 199 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:36:59,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 103 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 78 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2021-12-18 22:36:59,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-18 22:36:59,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 320. [2021-12-18 22:36:59,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 290 states have (on average 1.2310344827586206) internal successors, (357), 303 states have internal predecessors, (357), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:36:59,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 380 transitions. [2021-12-18 22:36:59,467 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 380 transitions. Word has length 51 [2021-12-18 22:36:59,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:36:59,468 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 380 transitions. [2021-12-18 22:36:59,468 INFO L471 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) [2021-12-18 22:36:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 380 transitions. [2021-12-18 22:36:59,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 22:36:59,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:36:59,468 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1] [2021-12-18 22:36:59,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-12-18 22:36:59,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-12-18 22:36:59,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:36:59,869 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:36:59,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:36:59,869 INFO L85 PathProgramCache]: Analyzing trace with hash 410026143, now seen corresponding path program 1 times [2021-12-18 22:36:59,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:36:59,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410712529] [2021-12-18 22:36:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:36:59,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:36:59,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:36:59,871 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:36:59,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-18 22:36:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:36:59,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 22:36:59,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:37:00,108 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 22:37:00,108 INFO L388 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 14 treesize of output 19 [2021-12-18 22:37:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 22:37:00,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:37:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 22:37:00,502 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:37:00,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410712529] [2021-12-18 22:37:00,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410712529] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:37:00,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:37:00,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-12-18 22:37:00,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939917813] [2021-12-18 22:37:00,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:37:00,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 22:37:00,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:37:00,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 22:37:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-18 22:37:00,503 INFO L87 Difference]: Start difference. First operand 320 states and 380 transitions. Second operand has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 1 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 22:37:00,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:37:00,839 INFO L93 Difference]: Finished difference Result 347 states and 397 transitions. [2021-12-18 22:37:00,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 22:37:00,840 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 1 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2021-12-18 22:37:00,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:37:00,841 INFO L225 Difference]: With dead ends: 347 [2021-12-18 22:37:00,841 INFO L226 Difference]: Without dead ends: 347 [2021-12-18 22:37:00,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-12-18 22:37:00,841 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 232 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:37:00,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 222 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 140 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2021-12-18 22:37:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-18 22:37:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 320. [2021-12-18 22:37:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 290 states have (on average 1.2206896551724138) internal successors, (354), 303 states have internal predecessors, (354), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:37:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 377 transitions. [2021-12-18 22:37:00,845 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 377 transitions. Word has length 51 [2021-12-18 22:37:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:37:00,845 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 377 transitions. [2021-12-18 22:37:00,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 1 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 22:37:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 377 transitions. [2021-12-18 22:37:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 22:37:00,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:37:00,846 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:37:00,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-12-18 22:37:01,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:37:01,058 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:37:01,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:37:01,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1016532274, now seen corresponding path program 1 times [2021-12-18 22:37:01,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:37:01,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599998490] [2021-12-18 22:37:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:37:01,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:37:01,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:37:01,060 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) [2021-12-18 22:37:01,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-12-18 22:37:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:37:01,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 22:37:01,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:37:01,424 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:37:01,424 INFO L388 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 19 treesize of output 26 [2021-12-18 22:37:04,023 INFO L354 Elim1Store]: treesize reduction 34, result has 49.3 percent of original size [2021-12-18 22:37:04,023 INFO L388 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 34 treesize of output 52 [2021-12-18 22:37:04,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:37:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:37:04,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:37:04,372 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:37:04,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599998490] [2021-12-18 22:37:04,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599998490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:37:04,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [634965700] [2021-12-18 22:37:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:37:04,373 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:37:04,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:37:04,374 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) [2021-12-18 22:37:04,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-12-18 22:37:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:37:04,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 22:37:04,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:37:04,868 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 22:37:04,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2021-12-18 22:37:07,424 INFO L354 Elim1Store]: treesize reduction 49, result has 47.9 percent of original size [2021-12-18 22:37:07,424 INFO L388 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 42 treesize of output 70 [2021-12-18 22:37:07,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:37:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:37:07,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:37:09,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [634965700] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:37:09,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:37:09,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-12-18 22:37:09,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622401078] [2021-12-18 22:37:09,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:37:09,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 22:37:09,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:37:09,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 22:37:09,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=513, Unknown=2, NotChecked=0, Total=600 [2021-12-18 22:37:09,777 INFO L87 Difference]: Start difference. First operand 320 states and 377 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) [2021-12-18 22:37:20,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:37:20,928 INFO L93 Difference]: Finished difference Result 354 states and 394 transitions. [2021-12-18 22:37:20,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 22:37:20,929 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 [2021-12-18 22:37:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:37:20,930 INFO L225 Difference]: With dead ends: 354 [2021-12-18 22:37:20,930 INFO L226 Difference]: Without dead ends: 354 [2021-12-18 22:37:20,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=242, Invalid=1011, Unknown=7, NotChecked=0, Total=1260 [2021-12-18 22:37:20,930 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 321 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 22:37:20,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 379 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 289 Invalid, 0 Unknown, 223 Unchecked, 0.5s Time] [2021-12-18 22:37:20,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-12-18 22:37:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 320. [2021-12-18 22:37:20,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 290 states have (on average 1.2137931034482758) internal successors, (352), 303 states have internal predecessors, (352), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:37:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 375 transitions. [2021-12-18 22:37:20,934 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 375 transitions. Word has length 52 [2021-12-18 22:37:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:37:20,934 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 375 transitions. [2021-12-18 22:37:20,935 INFO L471 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) [2021-12-18 22:37:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 375 transitions. [2021-12-18 22:37:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 22:37:20,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:37:20,935 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2021-12-18 22:37:20,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-12-18 22:37:21,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-12-18 22:37:21,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:37:21,344 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:37:21,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:37:21,344 INFO L85 PathProgramCache]: Analyzing trace with hash -174091406, now seen corresponding path program 1 times [2021-12-18 22:37:21,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:37:21,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011255247] [2021-12-18 22:37:21,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:37:21,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:37:21,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:37:21,345 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:37:21,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-18 22:37:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:37:21,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 22:37:21,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:37:23,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:37:23,636 INFO L388 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 [2021-12-18 22:37:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 37 refuted. 2 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 22:37:25,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:37:26,058 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:37:26,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011255247] [2021-12-18 22:37:26,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011255247] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:37:26,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1252722105] [2021-12-18 22:37:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:37:26,059 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:37:26,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:37:26,060 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:37:26,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-12-18 22:37:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:37:26,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 22:37:26,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:37:26,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:37:26,385 INFO L388 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 [2021-12-18 22:37:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 37 refuted. 2 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 22:37:26,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:37:26,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1252722105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:37:26,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:37:26,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-12-18 22:37:26,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003084383] [2021-12-18 22:37:26,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:37:26,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 22:37:26,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:37:26,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 22:37:26,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=137, Unknown=2, NotChecked=0, Total=182 [2021-12-18 22:37:26,702 INFO L87 Difference]: Start difference. First operand 320 states and 375 transitions. Second operand has 9 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 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) [2021-12-18 22:37:35,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:37:35,123 INFO L93 Difference]: Finished difference Result 361 states and 403 transitions. [2021-12-18 22:37:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 22:37:35,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 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 52 [2021-12-18 22:37:35,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:37:35,124 INFO L225 Difference]: With dead ends: 361 [2021-12-18 22:37:35,124 INFO L226 Difference]: Without dead ends: 361 [2021-12-18 22:37:35,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=161, Invalid=385, Unknown=6, NotChecked=0, Total=552 [2021-12-18 22:37:35,125 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 196 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:37:35,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 242 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 171 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2021-12-18 22:37:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-12-18 22:37:35,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 320. [2021-12-18 22:37:35,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 290 states have (on average 1.193103448275862) internal successors, (346), 303 states have internal predecessors, (346), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:37:35,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 369 transitions. [2021-12-18 22:37:35,129 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 369 transitions. Word has length 52 [2021-12-18 22:37:35,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:37:35,129 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 369 transitions. [2021-12-18 22:37:35,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 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) [2021-12-18 22:37:35,129 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 369 transitions. [2021-12-18 22:37:35,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 22:37:35,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:37:35,130 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2021-12-18 22:37:35,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-12-18 22:37:35,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-12-18 22:37:35,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:37:35,533 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:37:35,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:37:35,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1928976600, now seen corresponding path program 2 times [2021-12-18 22:37:35,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:37:35,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216003324] [2021-12-18 22:37:35,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:37:35,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:37:35,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:37:35,535 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:37:35,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-18 22:37:35,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:37:35,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:37:35,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 22:37:35,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:37:35,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:37:35,907 INFO L388 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 [2021-12-18 22:37:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 22:37:36,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:37:36,173 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:37:36,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216003324] [2021-12-18 22:37:36,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216003324] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:37:36,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [822165234] [2021-12-18 22:37:36,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:37:36,174 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:37:36,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:37:36,174 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:37:36,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-12-18 22:37:36,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:37:36,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:37:36,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 22:37:36,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:37:38,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:37:38,631 INFO L388 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 [2021-12-18 22:37:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 22:37:38,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:37:38,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [822165234] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:37:38,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:37:38,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-18 22:37:38,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339618217] [2021-12-18 22:37:38,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:37:38,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 22:37:38,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:37:38,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 22:37:38,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-18 22:37:38,775 INFO L87 Difference]: Start difference. First operand 320 states and 369 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 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) [2021-12-18 22:37:41,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:37:41,181 INFO L93 Difference]: Finished difference Result 342 states and 384 transitions. [2021-12-18 22:37:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 22:37:41,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 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 52 [2021-12-18 22:37:41,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:37:41,182 INFO L225 Difference]: With dead ends: 342 [2021-12-18 22:37:41,182 INFO L226 Difference]: Without dead ends: 342 [2021-12-18 22:37:41,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=111, Invalid=268, Unknown=1, NotChecked=0, Total=380 [2021-12-18 22:37:41,183 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 130 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:37:41,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 240 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 161 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2021-12-18 22:37:41,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-18 22:37:41,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 320. [2021-12-18 22:37:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 290 states have (on average 1.186206896551724) internal successors, (344), 303 states have internal predecessors, (344), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 22:37:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 367 transitions. [2021-12-18 22:37:41,193 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 367 transitions. Word has length 52 [2021-12-18 22:37:41,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:37:41,193 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 367 transitions. [2021-12-18 22:37:41,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 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) [2021-12-18 22:37:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 367 transitions. [2021-12-18 22:37:41,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 22:37:41,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:37:41,194 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:37:41,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-12-18 22:37:41,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-12-18 22:37:41,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:37:41,602 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:37:41,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:37:41,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1447729377, now seen corresponding path program 1 times [2021-12-18 22:37:41,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:37:41,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618085164] [2021-12-18 22:37:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:37:41,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:37:41,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:37:41,604 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:37:41,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-18 22:37:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:37:41,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 22:37:41,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:37:42,095 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:37:42,095 INFO L388 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 [2021-12-18 22:37:42,450 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 22:37:42,450 INFO L388 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 17 treesize of output 17 [2021-12-18 22:37:42,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:37:43,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:37:43,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 22:37:43,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:37:43,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:37:43,284 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:37:43,284 INFO L388 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 14 treesize of output 14 [2021-12-18 22:37:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:37:43,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:37:43,689 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-18 22:37:43,689 INFO L388 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 19 treesize of output 18 [2021-12-18 22:37:43,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-12-18 22:37:43,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:37:43,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618085164] [2021-12-18 22:37:43,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618085164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:37:43,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [792321249] [2021-12-18 22:37:43,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:37:43,774 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:37:43,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:37:43,775 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:37:43,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-12-18 22:37:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:37:43,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 22:37:43,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:37:44,338 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:37:44,338 INFO L388 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 [2021-12-18 22:37:44,621 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 22:37:44,622 INFO L388 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 17 treesize of output 17 [2021-12-18 22:37:44,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:37:45,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:37:45,176 INFO L388 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 [2021-12-18 22:37:45,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:37:45,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:37:45,357 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:37:45,357 INFO L388 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 14 treesize of output 14 [2021-12-18 22:37:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:37:45,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:37:45,528 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-18 22:37:45,528 INFO L388 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 19 treesize of output 18 [2021-12-18 22:37:45,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-12-18 22:37:45,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [792321249] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:37:45,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:37:45,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 18 [2021-12-18 22:37:45,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268516478] [2021-12-18 22:37:45,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:37:45,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 22:37:45,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:37:45,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 22:37:45,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-12-18 22:37:45,604 INFO L87 Difference]: Start difference. First operand 320 states and 367 transitions. Second operand has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 22:37:48,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:37:48,982 INFO L93 Difference]: Finished difference Result 360 states and 403 transitions. [2021-12-18 22:37:48,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 22:37:48,982 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2021-12-18 22:37:48,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:37:48,983 INFO L225 Difference]: With dead ends: 360 [2021-12-18 22:37:48,983 INFO L226 Difference]: Without dead ends: 360 [2021-12-18 22:37:48,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 22:37:48,984 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 224 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 22:37:48,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 446 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 191 Invalid, 0 Unknown, 401 Unchecked, 0.4s Time] [2021-12-18 22:37:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-18 22:37:48,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 339. [2021-12-18 22:37:48,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 307 states have (on average 1.1758957654723128) internal successors, (361), 320 states have internal predecessors, (361), 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) [2021-12-18 22:37:48,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 388 transitions. [2021-12-18 22:37:48,989 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 388 transitions. Word has length 53 [2021-12-18 22:37:48,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:37:48,989 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 388 transitions. [2021-12-18 22:37:48,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 22:37:48,989 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 388 transitions. [2021-12-18 22:37:48,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 22:37:48,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:37:48,990 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:37:48,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2021-12-18 22:37:49,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-12-18 22:37:49,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:37:49,391 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:37:49,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:37:49,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1929937680, now seen corresponding path program 1 times [2021-12-18 22:37:49,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:37:49,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966955119] [2021-12-18 22:37:49,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:37:49,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:37:49,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:37:49,393 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:37:49,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-12-18 22:37:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:37:49,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 22:37:49,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:37:49,717 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:37:49,717 INFO L388 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 19 treesize of output 26 [2021-12-18 22:37:52,065 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 22:37:52,066 INFO L388 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 31 treesize of output 45 [2021-12-18 22:37:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:37:52,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:37:52,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:37:52,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966955119] [2021-12-18 22:37:52,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966955119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:37:52,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1530415642] [2021-12-18 22:37:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:37:52,270 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:37:52,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:37:52,271 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:37:52,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-12-18 22:37:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:37:52,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 22:37:52,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:37:56,744 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 22:37:56,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2021-12-18 22:38:03,162 INFO L354 Elim1Store]: treesize reduction 29, result has 50.0 percent of original size [2021-12-18 22:38:03,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2021-12-18 22:38:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:38:03,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:38:05,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1530415642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:38:05,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:38:05,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-18 22:38:05,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511793190] [2021-12-18 22:38:05,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:38:05,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 22:38:05,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:38:05,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 22:38:05,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=463, Unknown=7, NotChecked=0, Total=552 [2021-12-18 22:38:05,411 INFO L87 Difference]: Start difference. First operand 339 states and 388 transitions. Second operand has 20 states, 17 states have (on average 4.352941176470588) internal successors, (74), 15 states have internal predecessors, (74), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:38:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:38:18,950 INFO L93 Difference]: Finished difference Result 382 states and 423 transitions. [2021-12-18 22:38:18,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 22:38:18,950 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.352941176470588) internal successors, (74), 15 states have internal predecessors, (74), 4 states have call successors, (6), 4 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 54 [2021-12-18 22:38:18,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:38:18,951 INFO L225 Difference]: With dead ends: 382 [2021-12-18 22:38:18,951 INFO L226 Difference]: Without dead ends: 382 [2021-12-18 22:38:18,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=253, Invalid=1144, Unknown=9, NotChecked=0, Total=1406 [2021-12-18 22:38:18,952 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 425 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 22:38:18,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 478 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 176 Unchecked, 0.4s Time] [2021-12-18 22:38:18,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-18 22:38:18,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 358. [2021-12-18 22:38:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 326 states have (on average 1.1625766871165644) internal successors, (379), 339 states have internal predecessors, (379), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 22:38:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 404 transitions. [2021-12-18 22:38:18,956 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 404 transitions. Word has length 54 [2021-12-18 22:38:18,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:38:18,956 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 404 transitions. [2021-12-18 22:38:18,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.352941176470588) internal successors, (74), 15 states have internal predecessors, (74), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:38:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 404 transitions. [2021-12-18 22:38:18,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 22:38:18,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:38:18,957 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:38:18,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-12-18 22:38:19,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2021-12-18 22:38:19,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:38:19,365 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:38:19,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:38:19,366 INFO L85 PathProgramCache]: Analyzing trace with hash 301474113, now seen corresponding path program 1 times [2021-12-18 22:38:19,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:38:19,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077061838] [2021-12-18 22:38:19,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:38:19,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:38:19,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:38:19,367 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:38:19,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-12-18 22:38:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:38:19,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 22:38:19,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:38:19,624 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:38:19,625 INFO L388 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 [2021-12-18 22:38:19,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:38:19,851 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:38:19,851 INFO L388 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 22 [2021-12-18 22:38:20,569 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:38:20,570 INFO L388 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 14 treesize of output 14 [2021-12-18 22:38:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:38:20,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:38:20,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-18 22:38:21,029 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:38:21,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077061838] [2021-12-18 22:38:21,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077061838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:38:21,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [949020149] [2021-12-18 22:38:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:38:21,030 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:38:21,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:38:21,031 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:38:21,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-12-18 22:38:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:38:21,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 22:38:21,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:38:21,345 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:38:21,345 INFO L388 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 [2021-12-18 22:38:21,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:38:21,484 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:38:21,484 INFO L388 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 22 [2021-12-18 22:38:22,043 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:38:22,043 INFO L388 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 14 treesize of output 14 [2021-12-18 22:38:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:38:22,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:38:22,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-18 22:38:22,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [949020149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:38:22,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:38:22,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-12-18 22:38:22,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938892240] [2021-12-18 22:38:22,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:38:22,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 22:38:22,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:38:22,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 22:38:22,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-12-18 22:38:22,220 INFO L87 Difference]: Start difference. First operand 358 states and 404 transitions. Second operand has 14 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 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) [2021-12-18 22:38:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:38:22,680 INFO L93 Difference]: Finished difference Result 374 states and 414 transitions. [2021-12-18 22:38:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 22:38:22,681 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 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 55 [2021-12-18 22:38:22,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:38:22,681 INFO L225 Difference]: With dead ends: 374 [2021-12-18 22:38:22,681 INFO L226 Difference]: Without dead ends: 374 [2021-12-18 22:38:22,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-12-18 22:38:22,682 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 163 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:38:22,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 222 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 203 Unchecked, 0.2s Time] [2021-12-18 22:38:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-12-18 22:38:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 358. [2021-12-18 22:38:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 326 states have (on average 1.1595092024539877) internal successors, (378), 339 states have internal predecessors, (378), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 22:38:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 403 transitions. [2021-12-18 22:38:22,686 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 403 transitions. Word has length 55 [2021-12-18 22:38:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:38:22,686 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 403 transitions. [2021-12-18 22:38:22,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 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) [2021-12-18 22:38:22,686 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 403 transitions. [2021-12-18 22:38:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 22:38:22,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:38:22,687 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:38:22,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-12-18 22:38:22,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-12-18 22:38:23,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:38:23,095 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:38:23,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:38:23,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1039811026, now seen corresponding path program 2 times [2021-12-18 22:38:23,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:38:23,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477838318] [2021-12-18 22:38:23,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:38:23,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:38:23,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:38:23,097 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:38:23,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-12-18 22:38:23,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:38:23,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:38:23,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 22:38:23,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:38:25,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:38:25,712 INFO L388 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 [2021-12-18 22:38:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 22:38:25,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:38:28,583 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:38:28,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477838318] [2021-12-18 22:38:28,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477838318] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:38:28,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1848294638] [2021-12-18 22:38:28,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:38:28,584 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:38:28,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:38:28,585 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:38:28,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2021-12-18 22:38:28,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:38:28,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:38:28,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 22:38:28,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:38:31,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:38:31,470 INFO L388 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 [2021-12-18 22:38:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 22:38:31,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:38:34,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1848294638] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:38:34,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:38:34,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-12-18 22:38:34,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825219623] [2021-12-18 22:38:34,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:38:34,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 22:38:34,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:38:34,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 22:38:34,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=116, Unknown=2, NotChecked=0, Total=156 [2021-12-18 22:38:34,083 INFO L87 Difference]: Start difference. First operand 358 states and 403 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 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) [2021-12-18 22:38:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:38:38,605 INFO L93 Difference]: Finished difference Result 379 states and 418 transitions. [2021-12-18 22:38:38,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 22:38:38,605 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 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 56 [2021-12-18 22:38:38,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:38:38,606 INFO L225 Difference]: With dead ends: 379 [2021-12-18 22:38:38,606 INFO L226 Difference]: Without dead ends: 379 [2021-12-18 22:38:38,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=155, Invalid=393, Unknown=4, NotChecked=0, Total=552 [2021-12-18 22:38:38,607 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 226 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:38:38,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 255 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 153 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2021-12-18 22:38:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-12-18 22:38:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 358. [2021-12-18 22:38:38,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 326 states have (on average 1.1503067484662577) internal successors, (375), 339 states have internal predecessors, (375), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 22:38:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 400 transitions. [2021-12-18 22:38:38,611 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 400 transitions. Word has length 56 [2021-12-18 22:38:38,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:38:38,613 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 400 transitions. [2021-12-18 22:38:38,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 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) [2021-12-18 22:38:38,613 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 400 transitions. [2021-12-18 22:38:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 22:38:38,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:38:38,613 INFO L514 BasicCegarLoop]: 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] [2021-12-18 22:38:38,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2021-12-18 22:38:38,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2021-12-18 22:38:39,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:38:39,014 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:38:39,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:38:39,014 INFO L85 PathProgramCache]: Analyzing trace with hash 717947847, now seen corresponding path program 1 times [2021-12-18 22:38:39,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:38:39,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099313637] [2021-12-18 22:38:39,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:38:39,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:38:39,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:38:39,020 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:38:39,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-12-18 22:38:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:38:39,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 22:38:39,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:38:39,405 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:38:39,406 INFO L388 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 [2021-12-18 22:38:39,614 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:38:39,614 INFO L388 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 13 [2021-12-18 22:38:39,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:38:40,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:38:40,035 INFO L388 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 [2021-12-18 22:38:40,208 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:38:40,208 INFO L388 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 14 treesize of output 14 [2021-12-18 22:38:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:38:40,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:38:41,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-18 22:38:41,242 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:38:41,242 INFO L388 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 15 treesize of output 14 [2021-12-18 22:38:41,406 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:38:41,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099313637] [2021-12-18 22:38:41,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099313637] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:38:41,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1826870396] [2021-12-18 22:38:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:38:41,407 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:38:41,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:38:41,408 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:38:41,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2021-12-18 22:38:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:38:41,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 22:38:41,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:38:41,872 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:38:41,872 INFO L388 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 [2021-12-18 22:38:42,066 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:38:42,066 INFO L388 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 13 [2021-12-18 22:38:43,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:38:43,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 22:38:43,123 INFO L388 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 [2021-12-18 22:38:43,261 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:38:43,262 INFO L388 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 14 treesize of output 14 [2021-12-18 22:38:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:38:43,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:38:43,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-18 22:38:43,785 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 22:38:43,786 INFO L388 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 15 treesize of output 14 [2021-12-18 22:38:43,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1826870396] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:38:43,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:38:43,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-12-18 22:38:43,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659161968] [2021-12-18 22:38:43,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:38:43,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 22:38:43,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:38:43,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 22:38:43,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-12-18 22:38:43,893 INFO L87 Difference]: Start difference. First operand 358 states and 400 transitions. Second operand has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 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) [2021-12-18 22:38:50,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:38:50,256 INFO L93 Difference]: Finished difference Result 376 states and 412 transitions. [2021-12-18 22:38:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 22:38:50,256 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 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 59 [2021-12-18 22:38:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:38:50,257 INFO L225 Difference]: With dead ends: 376 [2021-12-18 22:38:50,257 INFO L226 Difference]: Without dead ends: 376 [2021-12-18 22:38:50,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-18 22:38:50,258 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 300 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 22:38:50,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 494 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 202 Invalid, 0 Unknown, 388 Unchecked, 0.3s Time] [2021-12-18 22:38:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-12-18 22:38:50,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 358. [2021-12-18 22:38:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 326 states have (on average 1.1411042944785277) internal successors, (372), 339 states have internal predecessors, (372), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 22:38:50,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 397 transitions. [2021-12-18 22:38:50,262 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 397 transitions. Word has length 59 [2021-12-18 22:38:50,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:38:50,263 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 397 transitions. [2021-12-18 22:38:50,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 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) [2021-12-18 22:38:50,263 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 397 transitions. [2021-12-18 22:38:50,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 22:38:50,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:38:50,264 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-18 22:38:50,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-12-18 22:38:50,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2021-12-18 22:38:50,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:38:50,674 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:38:50,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:38:50,674 INFO L85 PathProgramCache]: Analyzing trace with hash 781546727, now seen corresponding path program 1 times [2021-12-18 22:38:50,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:38:50,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079741147] [2021-12-18 22:38:50,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:38:50,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:38:50,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:38:50,676 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:38:50,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-12-18 22:38:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:38:50,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 22:38:50,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:38:51,227 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:38:51,227 INFO L388 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 19 treesize of output 26 [2021-12-18 22:38:51,993 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 22:38:51,993 INFO L388 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 31 treesize of output 45 [2021-12-18 22:38:52,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:38:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:38:52,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:38:54,633 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:38:54,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079741147] [2021-12-18 22:38:54,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079741147] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:38:54,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [963049449] [2021-12-18 22:38:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:38:54,634 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:38:54,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:38:54,635 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:38:54,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-12-18 22:38:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:38:55,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 22:38:55,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:38:59,464 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 22:38:59,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2021-12-18 22:39:06,221 INFO L354 Elim1Store]: treesize reduction 29, result has 50.0 percent of original size [2021-12-18 22:39:06,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2021-12-18 22:39:06,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:39:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:39:06,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:39:08,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [963049449] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:39:08,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:39:08,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-18 22:39:08,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961287349] [2021-12-18 22:39:08,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:39:08,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 22:39:08,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:39:08,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 22:39:08,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=648, Unknown=6, NotChecked=0, Total=756 [2021-12-18 22:39:08,857 INFO L87 Difference]: Start difference. First operand 358 states and 397 transitions. Second operand has 22 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:39:58,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:39:58,967 INFO L93 Difference]: Finished difference Result 387 states and 423 transitions. [2021-12-18 22:39:58,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 22:39:58,967 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 4 states have call successors, (6), 4 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 60 [2021-12-18 22:39:58,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:39:58,968 INFO L225 Difference]: With dead ends: 387 [2021-12-18 22:39:58,968 INFO L226 Difference]: Without dead ends: 387 [2021-12-18 22:39:58,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 127 SyntacticMatches, 14 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 65.0s TimeCoverageRelationStatistics Valid=564, Invalid=2395, Unknown=11, NotChecked=0, Total=2970 [2021-12-18 22:39:58,969 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 389 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 22:39:58,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 449 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 388 Invalid, 0 Unknown, 357 Unchecked, 0.6s Time] [2021-12-18 22:39:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-18 22:39:58,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 357. [2021-12-18 22:39:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 326 states have (on average 1.1349693251533743) internal successors, (370), 338 states have internal predecessors, (370), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 22:39:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 395 transitions. [2021-12-18 22:39:58,973 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 395 transitions. Word has length 60 [2021-12-18 22:39:58,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:39:58,974 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 395 transitions. [2021-12-18 22:39:58,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 22:39:58,974 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 395 transitions. [2021-12-18 22:39:58,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 22:39:58,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:39:58,975 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-18 22:39:58,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2021-12-18 22:39:59,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2021-12-18 22:39:59,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:39:59,376 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:39:59,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:39:59,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1541855194, now seen corresponding path program 1 times [2021-12-18 22:39:59,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:39:59,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179431178] [2021-12-18 22:39:59,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:39:59,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:39:59,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:39:59,377 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:39:59,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-12-18 22:39:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:39:59,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 22:39:59,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:39:59,925 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:39:59,925 INFO L388 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 [2021-12-18 22:40:00,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:40:00,413 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:40:00,413 INFO L388 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 22 [2021-12-18 22:40:01,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:40:01,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:40:01,867 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:40:01,868 INFO L388 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 14 treesize of output 14 [2021-12-18 22:40:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:40:01,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:40:02,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-18 22:40:02,463 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:40:02,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179431178] [2021-12-18 22:40:02,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179431178] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:40:02,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1491576433] [2021-12-18 22:40:02,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:40:02,464 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:40:02,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:40:02,465 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:40:02,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2021-12-18 22:40:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:40:02,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 22:40:02,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:40:03,002 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:40:03,003 INFO L388 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 [2021-12-18 22:40:03,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:40:03,487 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 22:40:03,501 INFO L388 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 22 [2021-12-18 22:40:04,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:40:04,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 22:40:04,995 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 22:40:04,996 INFO L388 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 14 treesize of output 14 [2021-12-18 22:40:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:40:05,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:40:05,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-18 22:40:05,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1491576433] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:40:05,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:40:05,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-12-18 22:40:05,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525663683] [2021-12-18 22:40:05,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:40:05,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 22:40:05,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:40:05,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 22:40:05,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-12-18 22:40:05,274 INFO L87 Difference]: Start difference. First operand 357 states and 395 transitions. Second operand has 15 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 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) [2021-12-18 22:40:06,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:40:06,731 INFO L93 Difference]: Finished difference Result 371 states and 409 transitions. [2021-12-18 22:40:06,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 22:40:06,732 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 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 61 [2021-12-18 22:40:06,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:40:06,732 INFO L225 Difference]: With dead ends: 371 [2021-12-18 22:40:06,733 INFO L226 Difference]: Without dead ends: 371 [2021-12-18 22:40:06,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-12-18 22:40:06,733 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 185 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:40:06,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 444 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 441 Unchecked, 0.2s Time] [2021-12-18 22:40:06,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-18 22:40:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 362. [2021-12-18 22:40:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 331 states have (on average 1.1329305135951662) internal successors, (375), 343 states have internal predecessors, (375), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 22:40:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 400 transitions. [2021-12-18 22:40:06,737 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 400 transitions. Word has length 61 [2021-12-18 22:40:06,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:40:06,737 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 400 transitions. [2021-12-18 22:40:06,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 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) [2021-12-18 22:40:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 400 transitions. [2021-12-18 22:40:06,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 22:40:06,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:40:06,738 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-18 22:40:06,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-12-18 22:40:06,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2021-12-18 22:40:07,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:40:07,146 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:40:07,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:40:07,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1148136154, now seen corresponding path program 2 times [2021-12-18 22:40:07,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:40:07,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407082277] [2021-12-18 22:40:07,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 22:40:07,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:40:07,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:40:07,148 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:40:07,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-12-18 22:40:07,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 22:40:07,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 22:40:07,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 22:40:07,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:40:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:40:07,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:40:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:40:08,377 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:40:08,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407082277] [2021-12-18 22:40:08,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407082277] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:40:08,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:40:08,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-12-18 22:40:08,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325821848] [2021-12-18 22:40:08,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:40:08,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 22:40:08,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:40:08,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 22:40:08,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-18 22:40:08,378 INFO L87 Difference]: Start difference. First operand 362 states and 400 transitions. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 22:40:08,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:40:08,626 INFO L93 Difference]: Finished difference Result 362 states and 393 transitions. [2021-12-18 22:40:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 22:40:08,627 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2021-12-18 22:40:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:40:08,627 INFO L225 Difference]: With dead ends: 362 [2021-12-18 22:40:08,628 INFO L226 Difference]: Without dead ends: 362 [2021-12-18 22:40:08,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-18 22:40:08,628 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 155 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:40:08,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 234 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 22:40:08,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-12-18 22:40:08,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 346. [2021-12-18 22:40:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 317 states have (on average 1.1198738170347002) internal successors, (355), 329 states have internal predecessors, (355), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 22:40:08,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 377 transitions. [2021-12-18 22:40:08,631 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 377 transitions. Word has length 61 [2021-12-18 22:40:08,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:40:08,632 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 377 transitions. [2021-12-18 22:40:08,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 22:40:08,632 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 377 transitions. [2021-12-18 22:40:08,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 22:40:08,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:40:08,633 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:40:08,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-12-18 22:40:08,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:40:08,843 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:40:08,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:40:08,844 INFO L85 PathProgramCache]: Analyzing trace with hash -340935575, now seen corresponding path program 1 times [2021-12-18 22:40:08,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:40:08,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18790641] [2021-12-18 22:40:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:40:08,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:40:08,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:40:08,845 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:40:08,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-12-18 22:40:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:40:08,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 22:40:08,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:40:09,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-12-18 22:40:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:40:09,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:40:09,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-18 22:40:09,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:40:09,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18790641] [2021-12-18 22:40:09,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18790641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 22:40:09,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1538255252] [2021-12-18 22:40:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:40:09,828 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 22:40:09,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 22:40:09,830 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 22:40:09,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2021-12-18 22:40:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:40:10,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 22:40:10,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:40:10,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 22:40:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 22:40:10,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:40:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 22:40:10,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1538255252] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 22:40:10,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:40:10,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 5] total 20 [2021-12-18 22:40:10,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028280292] [2021-12-18 22:40:10,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:40:10,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 22:40:10,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:40:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 22:40:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-12-18 22:40:10,721 INFO L87 Difference]: Start difference. First operand 346 states and 377 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 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) [2021-12-18 22:40:11,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:40:11,030 INFO L93 Difference]: Finished difference Result 340 states and 363 transitions. [2021-12-18 22:40:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 22:40:11,031 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 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 63 [2021-12-18 22:40:11,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:40:11,032 INFO L225 Difference]: With dead ends: 340 [2021-12-18 22:40:11,032 INFO L226 Difference]: Without dead ends: 340 [2021-12-18 22:40:11,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-12-18 22:40:11,033 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 165 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 22:40:11,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 91 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 22:40:11,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-12-18 22:40:11,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2021-12-18 22:40:11,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 312 states have (on average 1.0929487179487178) internal successors, (341), 323 states have internal predecessors, (341), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 22:40:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 363 transitions. [2021-12-18 22:40:11,036 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 363 transitions. Word has length 63 [2021-12-18 22:40:11,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:40:11,036 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 363 transitions. [2021-12-18 22:40:11,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 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) [2021-12-18 22:40:11,037 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 363 transitions. [2021-12-18 22:40:11,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 22:40:11,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:40:11,037 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2021-12-18 22:40:11,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-12-18 22:40:11,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2021-12-18 22:40:11,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 22:40:11,443 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:40:11,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:40:11,444 INFO L85 PathProgramCache]: Analyzing trace with hash 40877192, now seen corresponding path program 1 times [2021-12-18 22:40:11,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:40:11,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175328008] [2021-12-18 22:40:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:40:11,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:40:11,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:40:11,445 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:40:11,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-12-18 22:40:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:40:11,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-18 22:40:11,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:40:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-18 22:40:11,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 22:40:11,625 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:40:11,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175328008] [2021-12-18 22:40:11,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175328008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 22:40:11,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 22:40:11,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 22:40:11,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380595090] [2021-12-18 22:40:11,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 22:40:11,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 22:40:11,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:40:11,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 22:40:11,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:40:11,626 INFO L87 Difference]: Start difference. First operand 340 states and 363 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 22:40:11,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:40:11,704 INFO L93 Difference]: Finished difference Result 347 states and 370 transitions. [2021-12-18 22:40:11,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 22:40:11,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2021-12-18 22:40:11,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:40:11,706 INFO L225 Difference]: With dead ends: 347 [2021-12-18 22:40:11,706 INFO L226 Difference]: Without dead ends: 347 [2021-12-18 22:40:11,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 22:40:11,706 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:40:11,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 67 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 22:40:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-18 22:40:11,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 339. [2021-12-18 22:40:11,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 312 states have (on average 1.0897435897435896) internal successors, (340), 322 states have internal predecessors, (340), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 22:40:11,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 362 transitions. [2021-12-18 22:40:11,710 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 362 transitions. Word has length 63 [2021-12-18 22:40:11,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:40:11,710 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 362 transitions. [2021-12-18 22:40:11,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 22:40:11,710 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 362 transitions. [2021-12-18 22:40:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-18 22:40:11,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:40:11,711 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:40:11,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2021-12-18 22:40:11,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:40:11,918 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:40:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:40:11,919 INFO L85 PathProgramCache]: Analyzing trace with hash -460493020, now seen corresponding path program 1 times [2021-12-18 22:40:11,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:40:11,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139917780] [2021-12-18 22:40:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:40:11,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:40:11,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:40:11,920 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:40:11,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-12-18 22:40:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:40:12,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 22:40:12,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:40:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 43 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:40:12,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:40:12,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-18 22:40:13,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-18 22:40:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 33 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 22:40:13,829 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:40:13,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139917780] [2021-12-18 22:40:13,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139917780] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:40:13,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:40:13,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-12-18 22:40:13,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39390777] [2021-12-18 22:40:13,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:40:13,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 22:40:13,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:40:13,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 22:40:13,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-12-18 22:40:13,831 INFO L87 Difference]: Start difference. First operand 339 states and 362 transitions. Second operand has 15 states, 14 states have (on average 8.571428571428571) internal successors, (120), 14 states have internal predecessors, (120), 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) [2021-12-18 22:40:14,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:40:14,851 INFO L93 Difference]: Finished difference Result 397 states and 423 transitions. [2021-12-18 22:40:14,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 22:40:14,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 8.571428571428571) internal successors, (120), 14 states have internal predecessors, (120), 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 65 [2021-12-18 22:40:14,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:40:14,852 INFO L225 Difference]: With dead ends: 397 [2021-12-18 22:40:14,852 INFO L226 Difference]: Without dead ends: 397 [2021-12-18 22:40:14,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-12-18 22:40:14,853 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 289 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 22:40:14,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 241 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 22:40:14,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-18 22:40:14,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 336. [2021-12-18 22:40:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 312 states have (on average 1.080128205128205) internal successors, (337), 319 states have internal predecessors, (337), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 22:40:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 359 transitions. [2021-12-18 22:40:14,857 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 359 transitions. Word has length 65 [2021-12-18 22:40:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:40:14,857 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 359 transitions. [2021-12-18 22:40:14,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 8.571428571428571) internal successors, (120), 14 states have internal predecessors, (120), 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) [2021-12-18 22:40:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 359 transitions. [2021-12-18 22:40:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 22:40:14,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:40:14,858 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:40:14,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2021-12-18 22:40:15,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:40:15,065 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:40:15,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:40:15,065 INFO L85 PathProgramCache]: Analyzing trace with hash 701075492, now seen corresponding path program 1 times [2021-12-18 22:40:15,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:40:15,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442850382] [2021-12-18 22:40:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:40:15,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:40:15,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:40:15,067 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:40:15,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-12-18 22:40:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 22:40:15,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 22:40:15,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 22:40:15,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 22:40:15,562 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 22:40:15,562 INFO L388 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 3 case distinctions, treesize of input 23 treesize of output 27 [2021-12-18 22:40:15,614 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 22:40:15,614 INFO L388 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 15 treesize of output 20 [2021-12-18 22:40:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:40:15,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 22:40:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 22:40:15,988 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 22:40:15,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442850382] [2021-12-18 22:40:15,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442850382] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 22:40:15,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 22:40:15,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-12-18 22:40:15,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594074690] [2021-12-18 22:40:15,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 22:40:15,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 22:40:15,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 22:40:15,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 22:40:15,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-18 22:40:15,989 INFO L87 Difference]: Start difference. First operand 336 states and 359 transitions. Second operand has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 22:40:16,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 22:40:16,131 INFO L93 Difference]: Finished difference Result 355 states and 375 transitions. [2021-12-18 22:40:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 22:40:16,131 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2021-12-18 22:40:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 22:40:16,132 INFO L225 Difference]: With dead ends: 355 [2021-12-18 22:40:16,132 INFO L226 Difference]: Without dead ends: 355 [2021-12-18 22:40:16,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-18 22:40:16,133 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 35 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 22:40:16,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 253 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 112 Unchecked, 0.1s Time] [2021-12-18 22:40:16,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-18 22:40:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 292. [2021-12-18 22:40:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 270 states have (on average 1.0740740740740742) internal successors, (290), 277 states have internal predecessors, (290), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-18 22:40:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 310 transitions. [2021-12-18 22:40:16,136 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 310 transitions. Word has length 66 [2021-12-18 22:40:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 22:40:16,136 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 310 transitions. [2021-12-18 22:40:16,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 22:40:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 310 transitions. [2021-12-18 22:40:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-18 22:40:16,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 22:40:16,137 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:40:16,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2021-12-18 22:40:16,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:40:16,343 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 22:40:16,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 22:40:16,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1953429379, now seen corresponding path program 1 times [2021-12-18 22:40:16,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 22:40:16,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762578466] [2021-12-18 22:40:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 22:40:16,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 22:40:16,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 22:40:16,345 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 22:40:16,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-12-18 22:40:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 22:40:16,476 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-18 22:40:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 22:40:16,611 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-18 22:40:16,611 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-18 22:40:16,611 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2021-12-18 22:40:16,612 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATION (21 of 23 remaining) [2021-12-18 22:40:16,613 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATION (20 of 23 remaining) [2021-12-18 22:40:16,613 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2021-12-18 22:40:16,613 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2021-12-18 22:40:16,613 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2021-12-18 22:40:16,613 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2021-12-18 22:40:16,613 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATION (15 of 23 remaining) [2021-12-18 22:40:16,613 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATION (14 of 23 remaining) [2021-12-18 22:40:16,613 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATION (13 of 23 remaining) [2021-12-18 22:40:16,613 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATION (12 of 23 remaining) [2021-12-18 22:40:16,613 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (11 of 23 remaining) [2021-12-18 22:40:16,613 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (10 of 23 remaining) [2021-12-18 22:40:16,613 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (9 of 23 remaining) [2021-12-18 22:40:16,613 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (8 of 23 remaining) [2021-12-18 22:40:16,613 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (7 of 23 remaining) [2021-12-18 22:40:16,614 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (6 of 23 remaining) [2021-12-18 22:40:16,614 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (5 of 23 remaining) [2021-12-18 22:40:16,614 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (4 of 23 remaining) [2021-12-18 22:40:16,614 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (3 of 23 remaining) [2021-12-18 22:40:16,614 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE (2 of 23 remaining) [2021-12-18 22:40:16,614 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE (1 of 23 remaining) [2021-12-18 22:40:16,614 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE (0 of 23 remaining) [2021-12-18 22:40:16,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2021-12-18 22:40:16,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 22:40:16,817 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 22:40:16,819 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 22:40:16,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 10:40:16 BoogieIcfgContainer [2021-12-18 22:40:16,884 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 22:40:16,884 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 22:40:16,884 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 22:40:16,884 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 22:40:16,885 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 10:34:37" (3/4) ... [2021-12-18 22:40:16,888 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-18 22:40:16,888 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 22:40:16,889 INFO L158 Benchmark]: Toolchain (without parser) took 339925.90ms. Allocated memory was 56.6MB in the beginning and 83.9MB in the end (delta: 27.3MB). Free memory was 32.2MB in the beginning and 34.5MB in the end (delta: -2.4MB). Peak memory consumption was 24.7MB. Max. memory is 16.1GB. [2021-12-18 22:40:16,889 INFO L158 Benchmark]: CDTParser took 0.43ms. Allocated memory is still 56.6MB. Free memory was 38.0MB in the beginning and 37.9MB in the end (delta: 33.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 22:40:16,889 INFO L158 Benchmark]: CACSL2BoogieTranslator took 450.99ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 31.9MB in the beginning and 42.3MB in the end (delta: -10.4MB). Peak memory consumption was 5.4MB. Max. memory is 16.1GB. [2021-12-18 22:40:16,889 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.69ms. Allocated memory is still 69.2MB. Free memory was 42.3MB in the beginning and 40.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 22:40:16,891 INFO L158 Benchmark]: Boogie Preprocessor took 52.39ms. Allocated memory is still 69.2MB. Free memory was 40.1MB in the beginning and 38.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 22:40:16,891 INFO L158 Benchmark]: RCFGBuilder took 404.93ms. Allocated memory is still 69.2MB. Free memory was 38.4MB in the beginning and 38.1MB in the end (delta: 227.1kB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2021-12-18 22:40:16,891 INFO L158 Benchmark]: TraceAbstraction took 338952.48ms. Allocated memory was 69.2MB in the beginning and 83.9MB in the end (delta: 14.7MB). Free memory was 37.6MB in the beginning and 34.5MB in the end (delta: 3.1MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. [2021-12-18 22:40:16,891 INFO L158 Benchmark]: Witness Printer took 4.08ms. Allocated memory is still 83.9MB. Free memory is still 34.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 22:40:16,892 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43ms. Allocated memory is still 56.6MB. Free memory was 38.0MB in the beginning and 37.9MB in the end (delta: 33.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 450.99ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 31.9MB in the beginning and 42.3MB in the end (delta: -10.4MB). Peak memory consumption was 5.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.69ms. Allocated memory is still 69.2MB. Free memory was 42.3MB in the beginning and 40.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.39ms. Allocated memory is still 69.2MB. Free memory was 40.1MB in the beginning and 38.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 404.93ms. Allocated memory is still 69.2MB. Free memory was 38.4MB in the beginning and 38.1MB in the end (delta: 227.1kB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. * TraceAbstraction took 338952.48ms. Allocated memory was 69.2MB in the beginning and 83.9MB in the end (delta: 14.7MB). Free memory was 37.6MB in the beginning and 34.5MB in the end (delta: 3.1MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. * Witness Printer took 4.08ms. Allocated memory is still 83.9MB. Free memory is still 34.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 722]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693, overapproximation of memtrack at line 722. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; VAL [commands={6:0}, global={0:0}, state=0] [L723] CALL parse_input("c1") VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].function={-1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={7:0}, state=1, x={7:0}] [L695] RET commands[i].function() [L723] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L724] CALL parse_input("c1") VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={4:0}, input={4:0}, state=1] [L692] COND FALSE !(i < 2) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={4:0}, input={4:0}, state=1] [L724] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L725] CALL parse_input("c2") VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L692] COND FALSE !(i < 2) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L725] RET parse_input("c2") VAL [commands={6:0}, global={7:0}, state=1] [L726] return 0; VAL [\result=0, commands={6:0}, global={7:0}, state=1] - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 67 locations, 23 error locations. Started 1 CEGAR loops. OverallTime: 338.8s, OverallIterations: 47, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 153.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9303 SdHoareTripleChecker+Valid, 12.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9297 mSDsluCounter, 12512 SdHoareTripleChecker+Invalid, 10.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3226 IncrementalHoareTripleChecker+Unchecked, 9571 mSDsCounter, 855 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6683 IncrementalHoareTripleChecker+Invalid, 10764 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 855 mSolverCounterUnsat, 2941 mSDtfsCounter, 6683 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4013 GetRequests, 3247 SyntacticMatches, 91 SemanticMatches, 675 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3898 ImplicationChecksByTransitivity, 264.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=757occurred in iteration=20, InterpolantAutomatonStates: 505, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 46 MinimizatonAttempts, 2636 StatesRemovedByMinimization, 44 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 163.2s InterpolantComputationTime, 2752 NumberOfCodeBlocks, 2752 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 3261 ConstructedInterpolants, 514 QuantifiedInterpolants, 45322 SizeOfPredicates, 308 NumberOfNonLiveVariables, 10623 ConjunctsInSsa, 957 ConjunctsInUnsatCore, 81 InterpolantComputations, 14 PerfectInterpolantSequences, 1051/2077 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-18 22:40:16,933 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 Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample