./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:54:21,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:54:21,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:54:21,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:54:21,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:54:21,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:54:21,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:54:21,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:54:21,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:54:21,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:54:21,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:54:21,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:54:21,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:54:21,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:54:21,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:54:21,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:54:21,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:54:21,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:54:21,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:54:21,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:54:21,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:54:21,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:54:22,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:54:22,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:54:22,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:54:22,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:54:22,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:54:22,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:54:22,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:54:22,004 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:54:22,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:54:22,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:54:22,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:54:22,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:54:22,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:54:22,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:54:22,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:54:22,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:54:22,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:54:22,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:54:22,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:54:22,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:54:22,025 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:54:22,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:54:22,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:54:22,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:54:22,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:54:22,026 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:54:22,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:54:22,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:54:22,027 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:54:22,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:54:22,027 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:54:22,028 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:54:22,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:54:22,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:54:22,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:54:22,028 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:54:22,028 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:54:22,028 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:54:22,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:54:22,029 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:54:22,029 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:54:22,029 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:54:22,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:54:22,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:54:22,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:54:22,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:54:22,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:54:22,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:54:22,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:54:22,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:54:22,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:54:22,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2021-12-14 19:54:22,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:54:22,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:54:22,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:54:22,256 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:54:22,256 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:54:22,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-12-14 19:54:22,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6033562b/1177a2302fd643098b4c021dc41dd60c/FLAGd3b471e06 [2021-12-14 19:54:22,712 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:54:22,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-12-14 19:54:22,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6033562b/1177a2302fd643098b4c021dc41dd60c/FLAGd3b471e06 [2021-12-14 19:54:22,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6033562b/1177a2302fd643098b4c021dc41dd60c [2021-12-14 19:54:22,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:54:22,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:54:22,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:54:22,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:54:22,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:54:22,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:54:22" (1/1) ... [2021-12-14 19:54:22,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@296ebe58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:22, skipping insertion in model container [2021-12-14 19:54:22,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:54:22" (1/1) ... [2021-12-14 19:54:22,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:54:22,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:54:23,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:54:23,021 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:54:23,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:54:23,087 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:54:23,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:23 WrapperNode [2021-12-14 19:54:23,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:54:23,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:54:23,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:54:23,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:54:23,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:23" (1/1) ... [2021-12-14 19:54:23,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:23" (1/1) ... [2021-12-14 19:54:23,133 INFO L137 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2021-12-14 19:54:23,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:54:23,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:54:23,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:54:23,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:54:23,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:23" (1/1) ... [2021-12-14 19:54:23,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:23" (1/1) ... [2021-12-14 19:54:23,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:23" (1/1) ... [2021-12-14 19:54:23,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:23" (1/1) ... [2021-12-14 19:54:23,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:23" (1/1) ... [2021-12-14 19:54:23,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:23" (1/1) ... [2021-12-14 19:54:23,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:23" (1/1) ... [2021-12-14 19:54:23,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:54:23,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:54:23,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:54:23,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:54:23,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:23" (1/1) ... [2021-12-14 19:54:23,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:54:23,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:23,202 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) [2021-12-14 19:54:23,203 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 [2021-12-14 19:54:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 19:54:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-12-14 19:54:23,228 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-12-14 19:54:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 19:54:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 19:54:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 19:54:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:54:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 19:54:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 19:54:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:54:23,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:54:23,321 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:54:23,322 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:54:23,477 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:54:23,482 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:54:23,484 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 19:54:23,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:54:23 BoogieIcfgContainer [2021-12-14 19:54:23,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:54:23,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:54:23,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:54:23,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:54:23,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:54:22" (1/3) ... [2021-12-14 19:54:23,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7202e4e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:54:23, skipping insertion in model container [2021-12-14 19:54:23,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:54:23" (2/3) ... [2021-12-14 19:54:23,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7202e4e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:54:23, skipping insertion in model container [2021-12-14 19:54:23,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:54:23" (3/3) ... [2021-12-14 19:54:23,491 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2021-12-14 19:54:23,494 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:54:23,494 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-12-14 19:54:23,537 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:54:23,541 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 [2021-12-14 19:54:23,541 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-12-14 19:54:23,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 19:54:23,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 19:54:23,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:23,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 19:54:23,557 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2021-12-14 19:54:23,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:23,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461045327] [2021-12-14 19:54:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:23,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:23,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:23,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461045327] [2021-12-14 19:54:23,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461045327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:23,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:54:23,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:54:23,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694955913] [2021-12-14 19:54:23,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:23,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:54:23,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:23,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:54:23,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:54:23,777 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:54:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:23,916 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-12-14 19:54:23,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:54:23,919 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 [2021-12-14 19:54:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:23,928 INFO L225 Difference]: With dead ends: 124 [2021-12-14 19:54:23,928 INFO L226 Difference]: Without dead ends: 118 [2021-12-14 19:54:23,930 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 [2021-12-14 19:54:23,933 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 149 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:23,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 109 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:54:23,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-14 19:54:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 92. [2021-12-14 19:54:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 82 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-14 19:54:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 123 transitions. [2021-12-14 19:54:23,969 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 123 transitions. Word has length 6 [2021-12-14 19:54:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:23,969 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 123 transitions. [2021-12-14 19:54:23,969 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) [2021-12-14 19:54:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 123 transitions. [2021-12-14 19:54:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 19:54:23,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:23,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 19:54:23,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 19:54:23,971 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2021-12-14 19:54:23,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:23,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610659282] [2021-12-14 19:54:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:23,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:24,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:24,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610659282] [2021-12-14 19:54:24,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610659282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:24,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:54:24,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:54:24,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481829313] [2021-12-14 19:54:24,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:24,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:54:24,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:24,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:54:24,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:54:24,103 INFO L87 Difference]: Start difference. First operand 92 states and 123 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:54:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:24,198 INFO L93 Difference]: Finished difference Result 221 states and 308 transitions. [2021-12-14 19:54:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:54:24,198 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 [2021-12-14 19:54:24,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:24,200 INFO L225 Difference]: With dead ends: 221 [2021-12-14 19:54:24,200 INFO L226 Difference]: Without dead ends: 221 [2021-12-14 19:54:24,200 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 [2021-12-14 19:54:24,201 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 120 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:24,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 207 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:54:24,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-14 19:54:24,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 168. [2021-12-14 19:54:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 133 states have (on average 1.6240601503759398) internal successors, (216), 150 states have internal predecessors, (216), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-14 19:54:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 261 transitions. [2021-12-14 19:54:24,220 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 261 transitions. Word has length 6 [2021-12-14 19:54:24,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:24,220 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 261 transitions. [2021-12-14 19:54:24,220 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) [2021-12-14 19:54:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 261 transitions. [2021-12-14 19:54:24,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 19:54:24,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:24,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:24,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 19:54:24,221 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 16 more)] === [2021-12-14 19:54:24,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:24,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2021-12-14 19:54:24,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:24,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481940197] [2021-12-14 19:54:24,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:24,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:24,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:24,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481940197] [2021-12-14 19:54:24,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481940197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:24,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:54:24,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:54:24,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266085455] [2021-12-14 19:54:24,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:24,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:54:24,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:24,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:54:24,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:54:24,378 INFO L87 Difference]: Start difference. First operand 168 states and 261 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:54:24,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:24,526 INFO L93 Difference]: Finished difference Result 244 states and 348 transitions. [2021-12-14 19:54:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:54:24,526 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 [2021-12-14 19:54:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:24,528 INFO L225 Difference]: With dead ends: 244 [2021-12-14 19:54:24,528 INFO L226 Difference]: Without dead ends: 244 [2021-12-14 19:54:24,528 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 [2021-12-14 19:54:24,529 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 136 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:24,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 162 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:54:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-14 19:54:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 171. [2021-12-14 19:54:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 136 states have (on average 1.6102941176470589) internal successors, (219), 153 states have internal predecessors, (219), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-14 19:54:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 264 transitions. [2021-12-14 19:54:24,542 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 264 transitions. Word has length 7 [2021-12-14 19:54:24,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:24,543 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 264 transitions. [2021-12-14 19:54:24,543 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) [2021-12-14 19:54:24,543 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 264 transitions. [2021-12-14 19:54:24,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:54:24,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:24,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:24,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 19:54:24,544 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 16 more)] === [2021-12-14 19:54:24,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2021-12-14 19:54:24,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:24,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119341427] [2021-12-14 19:54:24,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:24,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:24,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:24,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119341427] [2021-12-14 19:54:24,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119341427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:24,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:54:24,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:54:24,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270388286] [2021-12-14 19:54:24,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:24,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:54:24,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:24,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:54:24,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:54:24,697 INFO L87 Difference]: Start difference. First operand 171 states and 264 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:54:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:24,777 INFO L93 Difference]: Finished difference Result 223 states and 309 transitions. [2021-12-14 19:54:24,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:54:24,778 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 [2021-12-14 19:54:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:24,781 INFO L225 Difference]: With dead ends: 223 [2021-12-14 19:54:24,781 INFO L226 Difference]: Without dead ends: 223 [2021-12-14 19:54:24,782 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 [2021-12-14 19:54:24,791 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 89 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:24,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 204 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:54:24,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-14 19:54:24,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 171. [2021-12-14 19:54:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 136 states have (on average 1.5955882352941178) internal successors, (217), 153 states have internal predecessors, (217), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-14 19:54:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 262 transitions. [2021-12-14 19:54:24,805 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 262 transitions. Word has length 8 [2021-12-14 19:54:24,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:24,805 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 262 transitions. [2021-12-14 19:54:24,805 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) [2021-12-14 19:54:24,805 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 262 transitions. [2021-12-14 19:54:24,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 19:54:24,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:24,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:24,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 19:54:24,806 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 16 more)] === [2021-12-14 19:54:24,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:24,806 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2021-12-14 19:54:24,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:24,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264486722] [2021-12-14 19:54:24,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:24,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:24,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:24,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264486722] [2021-12-14 19:54:24,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264486722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:24,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:54:24,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:54:24,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083908999] [2021-12-14 19:54:24,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:24,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:54:24,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:24,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:54:24,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:54:24,843 INFO L87 Difference]: Start difference. First operand 171 states and 262 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:54:24,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:24,914 INFO L93 Difference]: Finished difference Result 250 states and 344 transitions. [2021-12-14 19:54:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:54:24,915 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 [2021-12-14 19:54:24,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:24,916 INFO L225 Difference]: With dead ends: 250 [2021-12-14 19:54:24,916 INFO L226 Difference]: Without dead ends: 250 [2021-12-14 19:54:24,917 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 [2021-12-14 19:54:24,917 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 135 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:24,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 193 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:54:24,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-14 19:54:24,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 207. [2021-12-14 19:54:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 170 states have (on average 1.5705882352941176) internal successors, (267), 188 states have internal predecessors, (267), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-14 19:54:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 312 transitions. [2021-12-14 19:54:24,927 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 312 transitions. Word has length 9 [2021-12-14 19:54:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:24,927 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 312 transitions. [2021-12-14 19:54:24,927 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) [2021-12-14 19:54:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 312 transitions. [2021-12-14 19:54:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 19:54:24,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:24,928 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:24,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 19:54:24,928 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 16 more)] === [2021-12-14 19:54:24,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:24,929 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2021-12-14 19:54:24,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:24,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069732738] [2021-12-14 19:54:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:24,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:24,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:24,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069732738] [2021-12-14 19:54:24,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069732738] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:24,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:54:24,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:54:24,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132330315] [2021-12-14 19:54:24,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:24,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:54:24,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:24,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:54:24,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:54:24,978 INFO L87 Difference]: Start difference. First operand 207 states and 312 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:54:25,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:25,037 INFO L93 Difference]: Finished difference Result 245 states and 327 transitions. [2021-12-14 19:54:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:54:25,038 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 [2021-12-14 19:54:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:25,039 INFO L225 Difference]: With dead ends: 245 [2021-12-14 19:54:25,039 INFO L226 Difference]: Without dead ends: 245 [2021-12-14 19:54:25,040 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 [2021-12-14 19:54:25,040 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 160 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:25,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 194 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:25,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-14 19:54:25,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 217. [2021-12-14 19:54:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 179 states have (on average 1.5642458100558658) internal successors, (280), 198 states have internal predecessors, (280), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-14 19:54:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 325 transitions. [2021-12-14 19:54:25,048 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 325 transitions. Word has length 10 [2021-12-14 19:54:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:25,048 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 325 transitions. [2021-12-14 19:54:25,049 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) [2021-12-14 19:54:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 325 transitions. [2021-12-14 19:54:25,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 19:54:25,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:25,049 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:25,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 19:54:25,050 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:25,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:25,050 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2021-12-14 19:54:25,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:25,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98515645] [2021-12-14 19:54:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:25,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:25,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:25,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98515645] [2021-12-14 19:54:25,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98515645] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:25,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464557726] [2021-12-14 19:54:25,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:25,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:25,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:25,130 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) [2021-12-14 19:54:25,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 19:54:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:25,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:54:25,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:25,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:25,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464557726] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:25,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:25,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2021-12-14 19:54:25,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023129974] [2021-12-14 19:54:25,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:25,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 19:54:25,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:25,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 19:54:25,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:54:25,433 INFO L87 Difference]: Start difference. First operand 217 states and 325 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:54:25,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:25,619 INFO L93 Difference]: Finished difference Result 302 states and 415 transitions. [2021-12-14 19:54:25,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:54:25,619 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 [2021-12-14 19:54:25,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:25,621 INFO L225 Difference]: With dead ends: 302 [2021-12-14 19:54:25,621 INFO L226 Difference]: Without dead ends: 302 [2021-12-14 19:54:25,621 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 [2021-12-14 19:54:25,622 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 415 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:25,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 448 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:54:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-14 19:54:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 229. [2021-12-14 19:54:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 188 states have (on average 1.4893617021276595) internal successors, (280), 210 states have internal predecessors, (280), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (44), 11 states have call predecessors, (44), 11 states have call successors, (44) [2021-12-14 19:54:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 335 transitions. [2021-12-14 19:54:25,630 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 335 transitions. Word has length 14 [2021-12-14 19:54:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:25,630 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 335 transitions. [2021-12-14 19:54:25,630 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) [2021-12-14 19:54:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 335 transitions. [2021-12-14 19:54:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-14 19:54:25,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:25,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:25,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:25,850 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 [2021-12-14 19:54:25,850 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 16 more)] === [2021-12-14 19:54:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:25,851 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2021-12-14 19:54:25,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:25,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926549887] [2021-12-14 19:54:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:25,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:25,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:25,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926549887] [2021-12-14 19:54:25,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926549887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:25,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109441380] [2021-12-14 19:54:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:25,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:25,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:25,967 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) [2021-12-14 19:54:25,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 19:54:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:26,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 19:54:26,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:26,104 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 [2021-12-14 19:54:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:26,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:26,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109441380] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:26,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:26,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-14 19:54:26,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635515009] [2021-12-14 19:54:26,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:26,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 19:54:26,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:26,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 19:54:26,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:54:26,160 INFO L87 Difference]: Start difference. First operand 229 states and 335 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:54:26,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:26,381 INFO L93 Difference]: Finished difference Result 335 states and 463 transitions. [2021-12-14 19:54:26,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:54:26,381 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 [2021-12-14 19:54:26,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:26,383 INFO L225 Difference]: With dead ends: 335 [2021-12-14 19:54:26,383 INFO L226 Difference]: Without dead ends: 335 [2021-12-14 19:54:26,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:54:26,384 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 221 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:26,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 411 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:54:26,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-12-14 19:54:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 239. [2021-12-14 19:54:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 197 states have (on average 1.482233502538071) internal successors, (292), 220 states have internal predecessors, (292), 11 states have call successors, (11), 7 states have call predecessors, (11), 13 states have return successors, (46), 11 states have call predecessors, (46), 11 states have call successors, (46) [2021-12-14 19:54:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 349 transitions. [2021-12-14 19:54:26,391 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 349 transitions. Word has length 15 [2021-12-14 19:54:26,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:26,392 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 349 transitions. [2021-12-14 19:54:26,392 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) [2021-12-14 19:54:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 349 transitions. [2021-12-14 19:54:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 19:54:26,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:26,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:26,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:26,595 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 [2021-12-14 19:54:26,596 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 16 more)] === [2021-12-14 19:54:26,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:26,596 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2021-12-14 19:54:26,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:26,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514009091] [2021-12-14 19:54:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:26,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:26,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:26,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514009091] [2021-12-14 19:54:26,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514009091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:26,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764709050] [2021-12-14 19:54:26,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:26,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:26,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:26,709 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) [2021-12-14 19:54:26,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 19:54:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:26,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 19:54:26,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:26,900 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 19 treesize of output 7 [2021-12-14 19:54:26,908 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 [2021-12-14 19:54:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:26,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:27,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764709050] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:27,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:27,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2021-12-14 19:54:27,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311485902] [2021-12-14 19:54:27,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:27,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 19:54:27,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:27,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 19:54:27,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:54:27,017 INFO L87 Difference]: Start difference. First operand 239 states and 349 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:54:27,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:27,470 INFO L93 Difference]: Finished difference Result 570 states and 775 transitions. [2021-12-14 19:54:27,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 19:54:27,471 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 [2021-12-14 19:54:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:27,473 INFO L225 Difference]: With dead ends: 570 [2021-12-14 19:54:27,473 INFO L226 Difference]: Without dead ends: 570 [2021-12-14 19:54:27,473 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 [2021-12-14 19:54:27,474 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 502 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:27,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 748 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:54:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-12-14 19:54:27,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 347. [2021-12-14 19:54:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 294 states have (on average 1.5136054421768708) internal successors, (445), 322 states have internal predecessors, (445), 14 states have call successors, (14), 10 states have call predecessors, (14), 21 states have return successors, (60), 14 states have call predecessors, (60), 14 states have call successors, (60) [2021-12-14 19:54:27,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 519 transitions. [2021-12-14 19:54:27,485 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 519 transitions. Word has length 16 [2021-12-14 19:54:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:27,485 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 519 transitions. [2021-12-14 19:54:27,485 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) [2021-12-14 19:54:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 519 transitions. [2021-12-14 19:54:27,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 19:54:27,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:27,486 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:27,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-14 19:54:27,699 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 [2021-12-14 19:54:27,699 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 16 more)] === [2021-12-14 19:54:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:27,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2021-12-14 19:54:27,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:27,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976928599] [2021-12-14 19:54:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:27,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:27,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:27,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976928599] [2021-12-14 19:54:27,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976928599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:27,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:54:27,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:54:27,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651767937] [2021-12-14 19:54:27,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:27,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:54:27,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:27,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:54:27,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:54:27,737 INFO L87 Difference]: Start difference. First operand 347 states and 519 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:54:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:27,751 INFO L93 Difference]: Finished difference Result 356 states and 501 transitions. [2021-12-14 19:54:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:54:27,752 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 [2021-12-14 19:54:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:27,753 INFO L225 Difference]: With dead ends: 356 [2021-12-14 19:54:27,753 INFO L226 Difference]: Without dead ends: 356 [2021-12-14 19:54:27,753 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 [2021-12-14 19:54:27,753 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 26 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:27,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 114 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:27,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-14 19:54:27,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 343. [2021-12-14 19:54:27,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 296 states have (on average 1.5067567567567568) internal successors, (446), 323 states have internal predecessors, (446), 11 states have call successors, (11), 8 states have call predecessors, (11), 18 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2021-12-14 19:54:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 495 transitions. [2021-12-14 19:54:27,761 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 495 transitions. Word has length 18 [2021-12-14 19:54:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:27,761 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 495 transitions. [2021-12-14 19:54:27,761 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) [2021-12-14 19:54:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 495 transitions. [2021-12-14 19:54:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 19:54:27,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:27,761 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] [2021-12-14 19:54:27,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 19:54:27,762 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:27,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:27,762 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2021-12-14 19:54:27,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:27,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119989988] [2021-12-14 19:54:27,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:27,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:27,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:27,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:27,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119989988] [2021-12-14 19:54:27,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119989988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:27,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:54:27,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:54:27,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609488356] [2021-12-14 19:54:27,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:27,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:54:27,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:27,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:54:27,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:54:27,790 INFO L87 Difference]: Start difference. First operand 343 states and 495 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:54:27,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:27,829 INFO L93 Difference]: Finished difference Result 263 states and 368 transitions. [2021-12-14 19:54:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:54:27,830 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 [2021-12-14 19:54:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:27,831 INFO L225 Difference]: With dead ends: 263 [2021-12-14 19:54:27,831 INFO L226 Difference]: Without dead ends: 263 [2021-12-14 19:54:27,831 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 [2021-12-14 19:54:27,831 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 48 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:27,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 87 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-14 19:54:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-12-14 19:54:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 224 states have (on average 1.4910714285714286) internal successors, (334), 248 states have internal predecessors, (334), 8 states have call successors, (8), 6 states have call predecessors, (8), 13 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-12-14 19:54:27,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 368 transitions. [2021-12-14 19:54:27,837 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 368 transitions. Word has length 25 [2021-12-14 19:54:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:27,837 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 368 transitions. [2021-12-14 19:54:27,837 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) [2021-12-14 19:54:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 368 transitions. [2021-12-14 19:54:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-14 19:54:27,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:27,837 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] [2021-12-14 19:54:27,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 19:54:27,838 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:27,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:27,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2021-12-14 19:54:27,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:27,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384438511] [2021-12-14 19:54:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:27,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:27,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:27,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:27,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384438511] [2021-12-14 19:54:27,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384438511] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:27,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88540550] [2021-12-14 19:54:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:27,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:27,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:27,957 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) [2021-12-14 19:54:27,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 19:54:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:28,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-14 19:54:28,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:28,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:54:28,279 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 [2021-12-14 19:54:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:28,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:28,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88540550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:28,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:54:28,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2021-12-14 19:54:28,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917180733] [2021-12-14 19:54:28,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:28,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 19:54:28,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:28,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 19:54:28,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-12-14 19:54:28,441 INFO L87 Difference]: Start difference. First operand 263 states and 368 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:54:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:28,968 INFO L93 Difference]: Finished difference Result 414 states and 529 transitions. [2021-12-14 19:54:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 19:54:28,968 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 [2021-12-14 19:54:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:28,970 INFO L225 Difference]: With dead ends: 414 [2021-12-14 19:54:28,970 INFO L226 Difference]: Without dead ends: 414 [2021-12-14 19:54:28,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2021-12-14 19:54:28,970 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 606 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:28,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 322 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 323 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2021-12-14 19:54:28,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-12-14 19:54:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 321. [2021-12-14 19:54:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 279 states have (on average 1.4838709677419355) internal successors, (414), 304 states have internal predecessors, (414), 9 states have call successors, (9), 7 states have call predecessors, (9), 15 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2021-12-14 19:54:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 450 transitions. [2021-12-14 19:54:28,977 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 450 transitions. Word has length 27 [2021-12-14 19:54:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:28,977 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 450 transitions. [2021-12-14 19:54:28,977 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) [2021-12-14 19:54:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 450 transitions. [2021-12-14 19:54:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 19:54:28,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:28,978 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] [2021-12-14 19:54:29,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:29,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:29,187 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:29,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:29,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2021-12-14 19:54:29,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:29,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302379647] [2021-12-14 19:54:29,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:29,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:29,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:29,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302379647] [2021-12-14 19:54:29,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302379647] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560658605] [2021-12-14 19:54:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:29,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:29,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:29,234 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) [2021-12-14 19:54:29,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 19:54:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:29,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:54:29,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:29,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:54:29,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560658605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:29,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:54:29,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2021-12-14 19:54:29,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619146273] [2021-12-14 19:54:29,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:29,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:54:29,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:54:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:54:29,414 INFO L87 Difference]: Start difference. First operand 321 states and 450 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:54:29,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:29,489 INFO L93 Difference]: Finished difference Result 416 states and 561 transitions. [2021-12-14 19:54:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:54:29,490 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 [2021-12-14 19:54:29,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:29,491 INFO L225 Difference]: With dead ends: 416 [2021-12-14 19:54:29,491 INFO L226 Difference]: Without dead ends: 416 [2021-12-14 19:54:29,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:54:29,492 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 122 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:29,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 195 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:29,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-12-14 19:54:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 344. [2021-12-14 19:54:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 302 states have (on average 1.4735099337748345) internal successors, (445), 327 states have internal predecessors, (445), 9 states have call successors, (9), 7 states have call predecessors, (9), 15 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2021-12-14 19:54:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 481 transitions. [2021-12-14 19:54:29,499 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 481 transitions. Word has length 28 [2021-12-14 19:54:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:29,499 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 481 transitions. [2021-12-14 19:54:29,499 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) [2021-12-14 19:54:29,499 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 481 transitions. [2021-12-14 19:54:29,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 19:54:29,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:29,500 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] [2021-12-14 19:54:29,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-14 19:54:29,722 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,SelfDestructingSolverStorable12 [2021-12-14 19:54:29,722 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:29,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:29,723 INFO L85 PathProgramCache]: Analyzing trace with hash -221078483, now seen corresponding path program 1 times [2021-12-14 19:54:29,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:29,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550531230] [2021-12-14 19:54:29,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:29,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:29,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:29,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:29,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550531230] [2021-12-14 19:54:29,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550531230] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:29,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345963645] [2021-12-14 19:54:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:29,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:29,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:29,975 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) [2021-12-14 19:54:29,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 19:54:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:30,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 19:54:30,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:30,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:54:30,348 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 [2021-12-14 19:54:30,414 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 [2021-12-14 19:54:30,417 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 [2021-12-14 19:54:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:30,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:30,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345963645] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:30,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:54:30,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2021-12-14 19:54:30,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641098069] [2021-12-14 19:54:30,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:30,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 19:54:30,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:30,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 19:54:30,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-12-14 19:54:30,546 INFO L87 Difference]: Start difference. First operand 344 states and 481 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:54:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:31,623 INFO L93 Difference]: Finished difference Result 554 states and 693 transitions. [2021-12-14 19:54:31,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-14 19:54:31,625 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 [2021-12-14 19:54:31,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:31,626 INFO L225 Difference]: With dead ends: 554 [2021-12-14 19:54:31,626 INFO L226 Difference]: Without dead ends: 554 [2021-12-14 19:54:31,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=462, Invalid=1794, Unknown=0, NotChecked=0, Total=2256 [2021-12-14 19:54:31,628 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 691 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:31,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 505 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 604 Invalid, 0 Unknown, 140 Unchecked, 0.4s Time] [2021-12-14 19:54:31,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-12-14 19:54:31,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 401. [2021-12-14 19:54:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 356 states have (on average 1.4915730337078652) internal successors, (531), 382 states have internal predecessors, (531), 10 states have call successors, (10), 8 states have call predecessors, (10), 17 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2021-12-14 19:54:31,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 571 transitions. [2021-12-14 19:54:31,635 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 571 transitions. Word has length 29 [2021-12-14 19:54:31,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:31,636 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 571 transitions. [2021-12-14 19:54:31,637 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) [2021-12-14 19:54:31,637 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 571 transitions. [2021-12-14 19:54:31,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-14 19:54:31,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:31,638 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:31,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:31,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:31,851 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:31,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:31,852 INFO L85 PathProgramCache]: Analyzing trace with hash -253201523, now seen corresponding path program 1 times [2021-12-14 19:54:31,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:31,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107164966] [2021-12-14 19:54:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:31,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:31,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 19:54:31,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:31,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107164966] [2021-12-14 19:54:31,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107164966] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:31,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84489917] [2021-12-14 19:54:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:31,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:31,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:31,894 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) [2021-12-14 19:54:31,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 19:54:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:31,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 19:54:31,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 19:54:31,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 19:54:32,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84489917] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:32,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:32,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-12-14 19:54:32,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913915895] [2021-12-14 19:54:32,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:32,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:54:32,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:32,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:54:32,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:54:32,088 INFO L87 Difference]: Start difference. First operand 401 states and 571 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 19:54:32,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:32,297 INFO L93 Difference]: Finished difference Result 558 states and 726 transitions. [2021-12-14 19:54:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 19:54:32,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-14 19:54:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:32,299 INFO L225 Difference]: With dead ends: 558 [2021-12-14 19:54:32,299 INFO L226 Difference]: Without dead ends: 558 [2021-12-14 19:54:32,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-12-14 19:54:32,300 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 389 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:32,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 213 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:54:32,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-12-14 19:54:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 478. [2021-12-14 19:54:32,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 431 states have (on average 1.443155452436195) internal successors, (622), 457 states have internal predecessors, (622), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-14 19:54:32,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 659 transitions. [2021-12-14 19:54:32,308 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 659 transitions. Word has length 30 [2021-12-14 19:54:32,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:32,308 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 659 transitions. [2021-12-14 19:54:32,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 19:54:32,308 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 659 transitions. [2021-12-14 19:54:32,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-14 19:54:32,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:32,309 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:32,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:32,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:32,525 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:32,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:32,526 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2021-12-14 19:54:32,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:32,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235111589] [2021-12-14 19:54:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:32,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:32,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 19:54:32,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:32,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235111589] [2021-12-14 19:54:32,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235111589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:32,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506989401] [2021-12-14 19:54:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:32,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:32,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:32,596 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) [2021-12-14 19:54:32,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 19:54:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:32,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 19:54:32,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 19:54:32,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 19:54:32,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506989401] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:32,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:32,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2021-12-14 19:54:32,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724351080] [2021-12-14 19:54:32,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:32,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 19:54:32,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:32,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 19:54:32,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:54:32,914 INFO L87 Difference]: Start difference. First operand 478 states and 659 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 19:54:33,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:33,210 INFO L93 Difference]: Finished difference Result 533 states and 692 transitions. [2021-12-14 19:54:33,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 19:54:33,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2021-12-14 19:54:33,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:33,212 INFO L225 Difference]: With dead ends: 533 [2021-12-14 19:54:33,212 INFO L226 Difference]: Without dead ends: 533 [2021-12-14 19:54:33,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-12-14 19:54:33,213 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 498 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:33,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 332 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:54:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-12-14 19:54:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 484. [2021-12-14 19:54:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 437 states have (on average 1.425629290617849) internal successors, (623), 463 states have internal predecessors, (623), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-14 19:54:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 659 transitions. [2021-12-14 19:54:33,220 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 659 transitions. Word has length 31 [2021-12-14 19:54:33,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:33,220 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 659 transitions. [2021-12-14 19:54:33,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 19:54:33,220 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 659 transitions. [2021-12-14 19:54:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-14 19:54:33,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:33,221 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] [2021-12-14 19:54:33,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:33,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 19:54:33,435 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:33,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:33,436 INFO L85 PathProgramCache]: Analyzing trace with hash -117381739, now seen corresponding path program 1 times [2021-12-14 19:54:33,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:33,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372083255] [2021-12-14 19:54:33,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:33,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:33,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:33,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:33,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372083255] [2021-12-14 19:54:33,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372083255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:33,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707251184] [2021-12-14 19:54:33,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:33,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:33,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:33,605 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) [2021-12-14 19:54:33,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 19:54:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:33,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-14 19:54:33,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:33,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:54:33,941 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 [2021-12-14 19:54:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:34,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:34,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707251184] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:34,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:54:34,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-12-14 19:54:34,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434627793] [2021-12-14 19:54:34,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:34,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 19:54:34,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 19:54:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-14 19:54:34,232 INFO L87 Difference]: Start difference. First operand 484 states and 659 transitions. Second operand has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:54:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:34,880 INFO L93 Difference]: Finished difference Result 555 states and 698 transitions. [2021-12-14 19:54:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 19:54:34,881 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 [2021-12-14 19:54:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:34,883 INFO L225 Difference]: With dead ends: 555 [2021-12-14 19:54:34,883 INFO L226 Difference]: Without dead ends: 555 [2021-12-14 19:54:34,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 19:54:34,884 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 451 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:34,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 427 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 542 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2021-12-14 19:54:34,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-12-14 19:54:34,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 484. [2021-12-14 19:54:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 437 states have (on average 1.3958810068649885) internal successors, (610), 463 states have internal predecessors, (610), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-14 19:54:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 646 transitions. [2021-12-14 19:54:34,892 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 646 transitions. Word has length 35 [2021-12-14 19:54:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:34,893 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 646 transitions. [2021-12-14 19:54:34,893 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) [2021-12-14 19:54:34,893 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 646 transitions. [2021-12-14 19:54:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-14 19:54:34,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:34,893 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] [2021-12-14 19:54:34,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:35,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 19:54:35,109 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:35,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:35,109 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2021-12-14 19:54:35,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:35,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9098604] [2021-12-14 19:54:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:35,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:35,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:35,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:35,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9098604] [2021-12-14 19:54:35,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9098604] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:35,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101064234] [2021-12-14 19:54:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:35,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:35,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:35,188 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) [2021-12-14 19:54:35,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 19:54:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:35,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 19:54:35,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:35,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:35,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101064234] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:35,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:35,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2021-12-14 19:54:35,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304438486] [2021-12-14 19:54:35,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:35,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:54:35,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:35,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:54:35,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:54:35,378 INFO L87 Difference]: Start difference. First operand 484 states and 646 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:54:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:35,439 INFO L93 Difference]: Finished difference Result 513 states and 669 transitions. [2021-12-14 19:54:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:54:35,440 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 [2021-12-14 19:54:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:35,441 INFO L225 Difference]: With dead ends: 513 [2021-12-14 19:54:35,441 INFO L226 Difference]: Without dead ends: 513 [2021-12-14 19:54:35,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:54:35,442 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 84 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:35,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 70 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:35,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-12-14 19:54:35,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 482. [2021-12-14 19:54:35,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 437 states have (on average 1.3775743707093822) internal successors, (602), 461 states have internal predecessors, (602), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-14 19:54:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 638 transitions. [2021-12-14 19:54:35,449 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 638 transitions. Word has length 40 [2021-12-14 19:54:35,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:35,449 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 638 transitions. [2021-12-14 19:54:35,449 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) [2021-12-14 19:54:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 638 transitions. [2021-12-14 19:54:35,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 19:54:35,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:35,450 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] [2021-12-14 19:54:35,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:35,663 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,SelfDestructingSolverStorable17 [2021-12-14 19:54:35,663 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:35,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2021-12-14 19:54:35,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:35,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157095010] [2021-12-14 19:54:35,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:35,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:35,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:35,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157095010] [2021-12-14 19:54:35,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157095010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176929959] [2021-12-14 19:54:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:35,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:35,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:35,727 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) [2021-12-14 19:54:35,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 19:54:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:35,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 19:54:35,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:35,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:35,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176929959] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:35,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:35,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2021-12-14 19:54:35,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437109041] [2021-12-14 19:54:35,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:35,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:54:35,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:35,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:54:35,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:54:35,913 INFO L87 Difference]: Start difference. First operand 482 states and 638 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:54:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:35,999 INFO L93 Difference]: Finished difference Result 511 states and 661 transitions. [2021-12-14 19:54:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:54:36,000 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 [2021-12-14 19:54:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:36,001 INFO L225 Difference]: With dead ends: 511 [2021-12-14 19:54:36,001 INFO L226 Difference]: Without dead ends: 511 [2021-12-14 19:54:36,001 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 [2021-12-14 19:54:36,002 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 80 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:36,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 50 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:54:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-12-14 19:54:36,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 480. [2021-12-14 19:54:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 437 states have (on average 1.3592677345537758) internal successors, (594), 459 states have internal predecessors, (594), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-14 19:54:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 630 transitions. [2021-12-14 19:54:36,010 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 630 transitions. Word has length 41 [2021-12-14 19:54:36,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:36,010 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 630 transitions. [2021-12-14 19:54:36,010 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) [2021-12-14 19:54:36,010 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 630 transitions. [2021-12-14 19:54:36,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-14 19:54:36,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:36,011 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] [2021-12-14 19:54:36,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:36,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:36,227 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:36,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:36,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2021-12-14 19:54:36,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:36,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679558591] [2021-12-14 19:54:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:36,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:36,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:36,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:36,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679558591] [2021-12-14 19:54:36,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679558591] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:36,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883787524] [2021-12-14 19:54:36,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:36,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:36,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:36,272 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) [2021-12-14 19:54:36,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 19:54:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:36,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-14 19:54:36,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:36,343 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 [2021-12-14 19:54:36,394 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 19:54:36,394 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 [2021-12-14 19:54:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:36,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:36,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883787524] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:36,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:36,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2021-12-14 19:54:36,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674908643] [2021-12-14 19:54:36,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:36,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:54:36,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:36,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:54:36,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:54:36,570 INFO L87 Difference]: Start difference. First operand 480 states and 630 transitions. Second operand has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 19:54:36,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:36,665 INFO L93 Difference]: Finished difference Result 532 states and 675 transitions. [2021-12-14 19:54:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:54:36,666 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 [2021-12-14 19:54:36,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:36,667 INFO L225 Difference]: With dead ends: 532 [2021-12-14 19:54:36,667 INFO L226 Difference]: Without dead ends: 532 [2021-12-14 19:54:36,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:54:36,668 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 83 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:36,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 176 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 170 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2021-12-14 19:54:36,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-12-14 19:54:36,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 486. [2021-12-14 19:54:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 443 states have (on average 1.3544018058690745) internal successors, (600), 465 states have internal predecessors, (600), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-14 19:54:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 636 transitions. [2021-12-14 19:54:36,675 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 636 transitions. Word has length 42 [2021-12-14 19:54:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:36,676 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 636 transitions. [2021-12-14 19:54:36,676 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) [2021-12-14 19:54:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 636 transitions. [2021-12-14 19:54:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 19:54:36,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:36,676 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] [2021-12-14 19:54:36,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:36,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:36,893 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:36,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:36,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1200736699, now seen corresponding path program 1 times [2021-12-14 19:54:36,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:36,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390475539] [2021-12-14 19:54:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:36,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:36,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:36,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:36,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390475539] [2021-12-14 19:54:36,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390475539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:36,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443540356] [2021-12-14 19:54:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:36,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:36,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:36,934 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) [2021-12-14 19:54:36,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 19:54:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:36,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 19:54:36,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:54:37,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:54:37,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443540356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:37,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:54:37,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-14 19:54:37,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102580689] [2021-12-14 19:54:37,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:37,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:54:37,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:37,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:54:37,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:54:37,058 INFO L87 Difference]: Start difference. First operand 486 states and 636 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:54:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:37,077 INFO L93 Difference]: Finished difference Result 580 states and 722 transitions. [2021-12-14 19:54:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:54:37,082 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 [2021-12-14 19:54:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:37,084 INFO L225 Difference]: With dead ends: 580 [2021-12-14 19:54:37,084 INFO L226 Difference]: Without dead ends: 580 [2021-12-14 19:54:37,084 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 [2021-12-14 19:54:37,085 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 68 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:37,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 156 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:37,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-12-14 19:54:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 476. [2021-12-14 19:54:37,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 433 states have (on average 1.327944572748268) internal successors, (575), 455 states have internal predecessors, (575), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-14 19:54:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 611 transitions. [2021-12-14 19:54:37,093 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 611 transitions. Word has length 45 [2021-12-14 19:54:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:37,094 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 611 transitions. [2021-12-14 19:54:37,094 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) [2021-12-14 19:54:37,094 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 611 transitions. [2021-12-14 19:54:37,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 19:54:37,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:37,094 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] [2021-12-14 19:54:37,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:37,311 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,SelfDestructingSolverStorable20 [2021-12-14 19:54:37,311 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:37,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:37,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1458472979, now seen corresponding path program 1 times [2021-12-14 19:54:37,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:37,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081126777] [2021-12-14 19:54:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:37,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:37,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:37,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:54:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 19:54:37,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:37,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081126777] [2021-12-14 19:54:37,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081126777] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:37,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530132520] [2021-12-14 19:54:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:37,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:37,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:37,423 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) [2021-12-14 19:54:37,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 19:54:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:37,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-14 19:54:37,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:37,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:54:37,878 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 [2021-12-14 19:54:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 19:54:37,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:38,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530132520] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:38,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:54:38,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2021-12-14 19:54:38,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761149763] [2021-12-14 19:54:38,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:38,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 19:54:38,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:38,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 19:54:38,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-12-14 19:54:38,016 INFO L87 Difference]: Start difference. First operand 476 states and 611 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) [2021-12-14 19:54:38,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:38,423 INFO L93 Difference]: Finished difference Result 546 states and 665 transitions. [2021-12-14 19:54:38,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 19:54:38,423 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 [2021-12-14 19:54:38,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:38,426 INFO L225 Difference]: With dead ends: 546 [2021-12-14 19:54:38,426 INFO L226 Difference]: Without dead ends: 546 [2021-12-14 19:54:38,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-12-14 19:54:38,428 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 418 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:38,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 363 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 328 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2021-12-14 19:54:38,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-12-14 19:54:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 483. [2021-12-14 19:54:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 441 states have (on average 1.3197278911564625) internal successors, (582), 462 states have internal predecessors, (582), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2021-12-14 19:54:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 615 transitions. [2021-12-14 19:54:38,435 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 615 transitions. Word has length 48 [2021-12-14 19:54:38,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:38,435 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 615 transitions. [2021-12-14 19:54:38,435 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) [2021-12-14 19:54:38,436 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 615 transitions. [2021-12-14 19:54:38,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 19:54:38,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:38,436 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] [2021-12-14 19:54:38,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:38,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:38,653 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:38,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:38,653 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2021-12-14 19:54:38,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:38,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553917585] [2021-12-14 19:54:38,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:38,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:38,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 19:54:38,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:38,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553917585] [2021-12-14 19:54:38,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553917585] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:38,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271094214] [2021-12-14 19:54:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:38,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:38,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:38,687 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) [2021-12-14 19:54:38,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 19:54:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 19:54:38,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 19:54:38,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:54:38,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271094214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:38,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:54:38,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-14 19:54:38,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125514660] [2021-12-14 19:54:38,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:38,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:54:38,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:38,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:54:38,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:54:38,792 INFO L87 Difference]: Start difference. First operand 483 states and 615 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:54:38,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:38,806 INFO L93 Difference]: Finished difference Result 509 states and 636 transitions. [2021-12-14 19:54:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:54:38,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-12-14 19:54:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:38,807 INFO L225 Difference]: With dead ends: 509 [2021-12-14 19:54:38,807 INFO L226 Difference]: Without dead ends: 509 [2021-12-14 19:54:38,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:54:38,811 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 13 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:38,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 110 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:38,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-12-14 19:54:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 482. [2021-12-14 19:54:38,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 441 states have (on average 1.3061224489795917) internal successors, (576), 461 states have internal predecessors, (576), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2021-12-14 19:54:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 609 transitions. [2021-12-14 19:54:38,819 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 609 transitions. Word has length 47 [2021-12-14 19:54:38,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:38,819 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 609 transitions. [2021-12-14 19:54:38,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:54:38,819 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 609 transitions. [2021-12-14 19:54:38,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 19:54:38,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:38,820 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] [2021-12-14 19:54:38,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:39,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:39,035 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:39,036 INFO L85 PathProgramCache]: Analyzing trace with hash 296907458, now seen corresponding path program 1 times [2021-12-14 19:54:39,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:39,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984229551] [2021-12-14 19:54:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:39,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:39,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:39,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:54:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:54:39,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984229551] [2021-12-14 19:54:39,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984229551] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565463469] [2021-12-14 19:54:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:39,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:39,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:39,137 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) [2021-12-14 19:54:39,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 19:54:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:39,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 19:54:39,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:39,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:39,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565463469] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:39,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:39,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2021-12-14 19:54:39,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076174297] [2021-12-14 19:54:39,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:39,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 19:54:39,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:39,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 19:54:39,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:54:39,392 INFO L87 Difference]: Start difference. First operand 482 states and 609 transitions. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 19:54:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:39,587 INFO L93 Difference]: Finished difference Result 404 states and 482 transitions. [2021-12-14 19:54:39,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:54:39,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2021-12-14 19:54:39,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:39,588 INFO L225 Difference]: With dead ends: 404 [2021-12-14 19:54:39,588 INFO L226 Difference]: Without dead ends: 404 [2021-12-14 19:54:39,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-12-14 19:54:39,589 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 206 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:39,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 144 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:54:39,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-12-14 19:54:39,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 367. [2021-12-14 19:54:39,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 334 states have (on average 1.2754491017964071) internal successors, (426), 350 states have internal predecessors, (426), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-14 19:54:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 448 transitions. [2021-12-14 19:54:39,593 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 448 transitions. Word has length 48 [2021-12-14 19:54:39,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:39,594 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 448 transitions. [2021-12-14 19:54:39,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 19:54:39,594 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 448 transitions. [2021-12-14 19:54:39,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 19:54:39,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:39,594 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, 1] [2021-12-14 19:54:39,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:39,811 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,SelfDestructingSolverStorable23 [2021-12-14 19:54:39,812 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:39,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:39,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1661228621, now seen corresponding path program 1 times [2021-12-14 19:54:39,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:39,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981737866] [2021-12-14 19:54:39,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:39,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:39,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 19:54:39,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:39,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981737866] [2021-12-14 19:54:39,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981737866] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:39,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260408347] [2021-12-14 19:54:39,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:39,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:39,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:39,850 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) [2021-12-14 19:54:39,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-14 19:54:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:39,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 19:54:39,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 19:54:39,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:54:39,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260408347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:39,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:54:39,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2021-12-14 19:54:39,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118305966] [2021-12-14 19:54:39,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:39,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:54:39,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:39,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:54:39,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:54:39,983 INFO L87 Difference]: Start difference. First operand 367 states and 448 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:54:40,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:40,003 INFO L93 Difference]: Finished difference Result 385 states and 462 transitions. [2021-12-14 19:54:40,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:54:40,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-12-14 19:54:40,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:40,004 INFO L225 Difference]: With dead ends: 385 [2021-12-14 19:54:40,004 INFO L226 Difference]: Without dead ends: 385 [2021-12-14 19:54:40,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:54:40,008 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 34 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:40,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 92 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:40,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-12-14 19:54:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 366. [2021-12-14 19:54:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 334 states have (on average 1.2604790419161678) internal successors, (421), 349 states have internal predecessors, (421), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-14 19:54:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 443 transitions. [2021-12-14 19:54:40,013 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 443 transitions. Word has length 48 [2021-12-14 19:54:40,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:40,014 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 443 transitions. [2021-12-14 19:54:40,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:54:40,018 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 443 transitions. [2021-12-14 19:54:40,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-14 19:54:40,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:40,019 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] [2021-12-14 19:54:40,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:40,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:40,233 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 16 more)] === [2021-12-14 19:54:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:40,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1433195828, now seen corresponding path program 1 times [2021-12-14 19:54:40,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:40,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687126249] [2021-12-14 19:54:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:40,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:40,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:40,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:54:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 19:54:40,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:40,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687126249] [2021-12-14 19:54:40,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687126249] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:40,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073376623] [2021-12-14 19:54:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:40,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:40,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:40,542 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) [2021-12-14 19:54:40,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-14 19:54:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:40,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-14 19:54:40,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:41,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:54:41,107 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 [2021-12-14 19:54:41,183 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 [2021-12-14 19:54:41,187 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 [2021-12-14 19:54:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 19:54:41,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:41,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073376623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:41,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:54:41,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2021-12-14 19:54:41,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796546035] [2021-12-14 19:54:41,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:41,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 19:54:41,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:41,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 19:54:41,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-12-14 19:54:41,336 INFO L87 Difference]: Start difference. First operand 366 states and 443 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 15 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:54:42,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:42,056 INFO L93 Difference]: Finished difference Result 415 states and 474 transitions. [2021-12-14 19:54:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 19:54:42,057 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 15 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2021-12-14 19:54:42,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:42,058 INFO L225 Difference]: With dead ends: 415 [2021-12-14 19:54:42,058 INFO L226 Difference]: Without dead ends: 415 [2021-12-14 19:54:42,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2021-12-14 19:54:42,058 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 593 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:42,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 340 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 393 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2021-12-14 19:54:42,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-12-14 19:54:42,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 366. [2021-12-14 19:54:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 334 states have (on average 1.2574850299401197) internal successors, (420), 349 states have internal predecessors, (420), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-14 19:54:42,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 442 transitions. [2021-12-14 19:54:42,063 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 442 transitions. Word has length 50 [2021-12-14 19:54:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:42,065 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 442 transitions. [2021-12-14 19:54:42,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 15 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:54:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 442 transitions. [2021-12-14 19:54:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-14 19:54:42,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:42,065 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, 1, 1] [2021-12-14 19:54:42,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:42,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:42,279 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:42,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash -41520225, now seen corresponding path program 1 times [2021-12-14 19:54:42,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:42,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783118517] [2021-12-14 19:54:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:42,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:42,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 19:54:42,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:42,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783118517] [2021-12-14 19:54:42,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783118517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:42,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757234939] [2021-12-14 19:54:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:42,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:42,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:42,313 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) [2021-12-14 19:54:42,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-14 19:54:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:42,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 19:54:42,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 19:54:42,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:54:42,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757234939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:42,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:54:42,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-14 19:54:42,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383930259] [2021-12-14 19:54:42,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:42,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:54:42,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:42,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:54:42,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:54:42,432 INFO L87 Difference]: Start difference. First operand 366 states and 442 transitions. Second operand has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:54:42,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:42,436 INFO L93 Difference]: Finished difference Result 384 states and 456 transitions. [2021-12-14 19:54:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:54:42,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-12-14 19:54:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:42,439 INFO L225 Difference]: With dead ends: 384 [2021-12-14 19:54:42,439 INFO L226 Difference]: Without dead ends: 384 [2021-12-14 19:54:42,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:54:42,440 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:42,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 107 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-12-14 19:54:42,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 365. [2021-12-14 19:54:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.2425149700598803) internal successors, (415), 348 states have internal predecessors, (415), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-14 19:54:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 437 transitions. [2021-12-14 19:54:42,445 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 437 transitions. Word has length 49 [2021-12-14 19:54:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:42,445 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 437 transitions. [2021-12-14 19:54:42,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:54:42,446 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 437 transitions. [2021-12-14 19:54:42,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 19:54:42,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:42,446 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:42,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:42,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:42,663 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:42,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:42,663 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2021-12-14 19:54:42,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:42,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700828950] [2021-12-14 19:54:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:42,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:42,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:42,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:54:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 19:54:42,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:42,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700828950] [2021-12-14 19:54:42,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700828950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:42,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090335658] [2021-12-14 19:54:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:42,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:42,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:42,717 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) [2021-12-14 19:54:42,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-14 19:54:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:42,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 19:54:42,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 19:54:42,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 19:54:43,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090335658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:43,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:43,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-12-14 19:54:43,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854538671] [2021-12-14 19:54:43,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:43,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:54:43,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:43,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:54:43,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:54:43,047 INFO L87 Difference]: Start difference. First operand 365 states and 437 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 19:54:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:43,242 INFO L93 Difference]: Finished difference Result 402 states and 463 transitions. [2021-12-14 19:54:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 19:54:43,243 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2021-12-14 19:54:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:43,244 INFO L225 Difference]: With dead ends: 402 [2021-12-14 19:54:43,244 INFO L226 Difference]: Without dead ends: 402 [2021-12-14 19:54:43,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-12-14 19:54:43,244 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 307 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:43,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 179 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:54:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-14 19:54:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 365. [2021-12-14 19:54:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.2335329341317365) internal successors, (412), 348 states have internal predecessors, (412), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-14 19:54:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 434 transitions. [2021-12-14 19:54:43,249 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 434 transitions. Word has length 51 [2021-12-14 19:54:43,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:43,249 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 434 transitions. [2021-12-14 19:54:43,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 19:54:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 434 transitions. [2021-12-14 19:54:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 19:54:43,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:43,254 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] [2021-12-14 19:54:43,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:43,454 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,SelfDestructingSolverStorable27 [2021-12-14 19:54:43,454 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:43,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:43,455 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2021-12-14 19:54:43,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:43,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498924271] [2021-12-14 19:54:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:43,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:43,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:43,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:54:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:54:43,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:43,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498924271] [2021-12-14 19:54:43,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498924271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:43,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259582729] [2021-12-14 19:54:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:43,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:43,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:43,568 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) [2021-12-14 19:54:43,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-14 19:54:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:43,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-14 19:54:43,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:43,722 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:54:43,722 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 [2021-12-14 19:54:43,825 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 19:54:43,826 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 [2021-12-14 19:54:43,868 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:54:43,869 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 [2021-12-14 19:54:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:43,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:43,973 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-14 19:54:43,973 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 110 treesize of output 105 [2021-12-14 19:54:44,182 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-14 19:54:44,183 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 110 treesize of output 105 [2021-12-14 19:54:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:44,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259582729] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:44,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:44,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 25 [2021-12-14 19:54:44,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663389872] [2021-12-14 19:54:44,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:44,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 19:54:44,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:44,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 19:54:44,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-12-14 19:54:44,349 INFO L87 Difference]: Start difference. First operand 365 states and 434 transitions. Second operand has 26 states, 24 states have (on average 5.5) internal successors, (132), 24 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) [2021-12-14 19:54:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:44,613 INFO L93 Difference]: Finished difference Result 393 states and 460 transitions. [2021-12-14 19:54:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:54:44,614 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 5.5) internal successors, (132), 24 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 [2021-12-14 19:54:44,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:44,615 INFO L225 Difference]: With dead ends: 393 [2021-12-14 19:54:44,615 INFO L226 Difference]: Without dead ends: 393 [2021-12-14 19:54:44,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=825, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 19:54:44,616 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 355 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:44,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 167 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 312 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2021-12-14 19:54:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-14 19:54:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 365. [2021-12-14 19:54:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.2305389221556886) internal successors, (411), 348 states have internal predecessors, (411), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-14 19:54:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 433 transitions. [2021-12-14 19:54:44,620 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 433 transitions. Word has length 51 [2021-12-14 19:54:44,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:44,620 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 433 transitions. [2021-12-14 19:54:44,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 5.5) internal successors, (132), 24 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) [2021-12-14 19:54:44,620 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 433 transitions. [2021-12-14 19:54:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 19:54:44,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:44,621 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] [2021-12-14 19:54:44,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-14 19:54:44,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-14 19:54:44,837 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:44,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:44,837 INFO L85 PathProgramCache]: Analyzing trace with hash -563187968, now seen corresponding path program 1 times [2021-12-14 19:54:44,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:44,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26957426] [2021-12-14 19:54:44,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:44,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:44,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:44,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:54:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:54:44,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:44,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26957426] [2021-12-14 19:54:44,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26957426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:44,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469708848] [2021-12-14 19:54:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:44,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:44,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:44,915 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) [2021-12-14 19:54:44,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-14 19:54:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:44,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 19:54:44,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:45,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:54:45,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-12-14 19:54:45,115 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:54:45,115 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 [2021-12-14 19:54:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:54:45,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:54:45,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469708848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:45,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:54:45,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2021-12-14 19:54:45,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735151595] [2021-12-14 19:54:45,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:45,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:54:45,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:45,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:54:45,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:54:45,172 INFO L87 Difference]: Start difference. First operand 365 states and 433 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 19:54:45,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:45,272 INFO L93 Difference]: Finished difference Result 443 states and 508 transitions. [2021-12-14 19:54:45,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:54:45,272 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 [2021-12-14 19:54:45,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:45,273 INFO L225 Difference]: With dead ends: 443 [2021-12-14 19:54:45,273 INFO L226 Difference]: Without dead ends: 443 [2021-12-14 19:54:45,274 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 [2021-12-14 19:54:45,274 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 276 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:45,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 80 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:54:45,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-12-14 19:54:45,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 365. [2021-12-14 19:54:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.221556886227545) internal successors, (408), 348 states have internal predecessors, (408), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-14 19:54:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 430 transitions. [2021-12-14 19:54:45,278 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 430 transitions. Word has length 51 [2021-12-14 19:54:45,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:45,278 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 430 transitions. [2021-12-14 19:54:45,278 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) [2021-12-14 19:54:45,278 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 430 transitions. [2021-12-14 19:54:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 19:54:45,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:45,279 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:54:45,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:45,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:45,495 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:45,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:45,495 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2021-12-14 19:54:45,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:45,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167231971] [2021-12-14 19:54:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:45,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:45,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:45,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:54:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 19:54:45,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:45,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167231971] [2021-12-14 19:54:45,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167231971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:45,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521271054] [2021-12-14 19:54:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:45,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:45,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:45,544 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) [2021-12-14 19:54:45,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-14 19:54:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:45,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 19:54:45,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 19:54:45,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 19:54:45,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521271054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:45,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:45,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2021-12-14 19:54:45,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845259352] [2021-12-14 19:54:45,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:45,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 19:54:45,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:45,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 19:54:45,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:54:45,920 INFO L87 Difference]: Start difference. First operand 365 states and 430 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-14 19:54:46,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:46,197 INFO L93 Difference]: Finished difference Result 396 states and 455 transitions. [2021-12-14 19:54:46,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 19:54:46,198 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2021-12-14 19:54:46,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:46,199 INFO L225 Difference]: With dead ends: 396 [2021-12-14 19:54:46,199 INFO L226 Difference]: Without dead ends: 396 [2021-12-14 19:54:46,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-12-14 19:54:46,200 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 362 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:46,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 341 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:54:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-14 19:54:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 364. [2021-12-14 19:54:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 334 states have (on average 1.2065868263473054) internal successors, (403), 347 states have internal predecessors, (403), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-14 19:54:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 425 transitions. [2021-12-14 19:54:46,204 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 425 transitions. Word has length 52 [2021-12-14 19:54:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:46,204 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 425 transitions. [2021-12-14 19:54:46,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-14 19:54:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 425 transitions. [2021-12-14 19:54:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 19:54:46,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:46,205 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] [2021-12-14 19:54:46,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-14 19:54:46,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:46,419 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 16 more)] === [2021-12-14 19:54:46,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:46,420 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2021-12-14 19:54:46,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:46,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396002015] [2021-12-14 19:54:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:46,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:46,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:46,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:54:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:54:46,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:46,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396002015] [2021-12-14 19:54:46,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396002015] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:46,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525505814] [2021-12-14 19:54:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:46,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:46,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:46,814 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) [2021-12-14 19:54:46,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-14 19:54:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:46,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-14 19:54:46,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:47,076 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:54:47,076 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 [2021-12-14 19:54:47,287 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-14 19:54:47,287 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 [2021-12-14 19:54:47,347 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-14 19:54:47,347 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 [2021-12-14 19:54:47,474 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 [2021-12-14 19:54:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:47,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:47,560 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-14 19:54:47,561 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 88 treesize of output 81 [2021-12-14 19:54:47,779 INFO L354 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2021-12-14 19:54:47,779 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 [2021-12-14 19:54:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:48,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525505814] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:48,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:48,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 14] total 44 [2021-12-14 19:54:48,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87943799] [2021-12-14 19:54:48,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:48,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-14 19:54:48,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:48,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-14 19:54:48,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2021-12-14 19:54:48,078 INFO L87 Difference]: Start difference. First operand 364 states and 425 transitions. Second operand has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-14 19:54:48,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:48,753 INFO L93 Difference]: Finished difference Result 451 states and 511 transitions. [2021-12-14 19:54:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 19:54:48,753 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 [2021-12-14 19:54:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:48,755 INFO L225 Difference]: With dead ends: 451 [2021-12-14 19:54:48,755 INFO L226 Difference]: Without dead ends: 451 [2021-12-14 19:54:48,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 83 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=579, Invalid=2843, Unknown=0, NotChecked=0, Total=3422 [2021-12-14 19:54:48,756 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 847 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:48,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 222 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 620 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2021-12-14 19:54:48,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-12-14 19:54:48,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 364. [2021-12-14 19:54:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 334 states have (on average 1.2035928143712575) internal successors, (402), 347 states have internal predecessors, (402), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-14 19:54:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 424 transitions. [2021-12-14 19:54:48,760 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 424 transitions. Word has length 52 [2021-12-14 19:54:48,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:48,760 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 424 transitions. [2021-12-14 19:54:48,760 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) [2021-12-14 19:54:48,760 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 424 transitions. [2021-12-14 19:54:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 19:54:48,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:48,761 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, 1, 1, 1, 1, 1] [2021-12-14 19:54:48,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-14 19:54:48,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:48,977 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:48,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:48,978 INFO L85 PathProgramCache]: Analyzing trace with hash 21635793, now seen corresponding path program 1 times [2021-12-14 19:54:48,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:48,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873748227] [2021-12-14 19:54:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:48,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:49,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 19:54:49,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:49,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873748227] [2021-12-14 19:54:49,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873748227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:49,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077349854] [2021-12-14 19:54:49,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:49,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:49,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:49,008 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) [2021-12-14 19:54:49,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-14 19:54:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:49,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 19:54:49,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 19:54:49,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:54:49,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077349854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:54:49,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:54:49,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-12-14 19:54:49,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544040337] [2021-12-14 19:54:49,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:54:49,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:54:49,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:49,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:54:49,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:54:49,114 INFO L87 Difference]: Start difference. First operand 364 states and 424 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:54:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:49,116 INFO L93 Difference]: Finished difference Result 306 states and 346 transitions. [2021-12-14 19:54:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:54:49,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-14 19:54:49,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:49,117 INFO L225 Difference]: With dead ends: 306 [2021-12-14 19:54:49,117 INFO L226 Difference]: Without dead ends: 306 [2021-12-14 19:54:49,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:54:49,117 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 4 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:49,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 98 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:54:49,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-14 19:54:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 289. [2021-12-14 19:54:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.178030303030303) internal successors, (311), 274 states have internal predecessors, (311), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-14 19:54:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 329 transitions. [2021-12-14 19:54:49,127 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 329 transitions. Word has length 52 [2021-12-14 19:54:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:49,127 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 329 transitions. [2021-12-14 19:54:49,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:54:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 329 transitions. [2021-12-14 19:54:49,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-14 19:54:49,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:49,128 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] [2021-12-14 19:54:49,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:49,329 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,SelfDestructingSolverStorable32 [2021-12-14 19:54:49,330 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:49,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:49,330 INFO L85 PathProgramCache]: Analyzing trace with hash -57759457, now seen corresponding path program 1 times [2021-12-14 19:54:49,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:49,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654006760] [2021-12-14 19:54:49,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:49,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:49,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:49,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:54:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:54:49,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:49,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654006760] [2021-12-14 19:54:49,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654006760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:49,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854421600] [2021-12-14 19:54:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:49,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:49,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:49,760 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) [2021-12-14 19:54:49,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-14 19:54:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:49,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 19:54:49,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:50,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:54:50,068 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 [2021-12-14 19:54:50,074 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-14 19:54:50,074 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 [2021-12-14 19:54:50,184 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 [2021-12-14 19:54:50,186 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 [2021-12-14 19:54:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:54:50,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:50,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:54:50,308 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 [2021-12-14 19:54:50,314 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-14 19:54:50,314 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 16 [2021-12-14 19:54:50,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:54:50,574 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 [2021-12-14 19:54:50,666 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-14 19:54:50,667 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 [2021-12-14 19:54:50,701 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-12-14 19:54:50,701 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 [2021-12-14 19:54:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:54:50,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854421600] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:54:50,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:54:50,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 10] total 37 [2021-12-14 19:54:50,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39325760] [2021-12-14 19:54:50,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:50,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-14 19:54:50,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:50,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-14 19:54:50,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-12-14 19:54:50,756 INFO L87 Difference]: Start difference. First operand 289 states and 329 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) [2021-12-14 19:54:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:51,557 INFO L93 Difference]: Finished difference Result 353 states and 392 transitions. [2021-12-14 19:54:51,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 19:54:51,557 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 [2021-12-14 19:54:51,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:51,558 INFO L225 Difference]: With dead ends: 353 [2021-12-14 19:54:51,558 INFO L226 Difference]: Without dead ends: 353 [2021-12-14 19:54:51,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=528, Invalid=2442, Unknown=0, NotChecked=0, Total=2970 [2021-12-14 19:54:51,559 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 743 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:51,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 244 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 549 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2021-12-14 19:54:51,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-14 19:54:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 289. [2021-12-14 19:54:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.1742424242424243) internal successors, (310), 274 states have internal predecessors, (310), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-14 19:54:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 328 transitions. [2021-12-14 19:54:51,562 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 328 transitions. Word has length 53 [2021-12-14 19:54:51,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:51,562 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 328 transitions. [2021-12-14 19:54:51,562 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) [2021-12-14 19:54:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 328 transitions. [2021-12-14 19:54:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 19:54:51,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:51,563 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] [2021-12-14 19:54:51,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:51,779 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,SelfDestructingSolverStorable33 [2021-12-14 19:54:51,779 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:51,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:51,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2021-12-14 19:54:51,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:51,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591606441] [2021-12-14 19:54:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:51,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:51,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:51,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:54:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:54:51,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:51,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591606441] [2021-12-14 19:54:51,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591606441] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:51,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667656421] [2021-12-14 19:54:51,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:51,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:51,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:51,941 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) [2021-12-14 19:54:51,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-14 19:54:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:52,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-14 19:54:52,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:52,081 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 19:54:52,082 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 [2021-12-14 19:54:52,205 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-14 19:54:52,205 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 [2021-12-14 19:54:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:52,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:52,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667656421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:52,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:54:52,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-12-14 19:54:52,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672650896] [2021-12-14 19:54:52,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:52,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 19:54:52,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:52,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 19:54:52,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-12-14 19:54:52,519 INFO L87 Difference]: Start difference. First operand 289 states and 328 transitions. Second operand has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:54:52,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:52,921 INFO L93 Difference]: Finished difference Result 307 states and 344 transitions. [2021-12-14 19:54:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 19:54:52,921 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 [2021-12-14 19:54:52,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:52,922 INFO L225 Difference]: With dead ends: 307 [2021-12-14 19:54:52,922 INFO L226 Difference]: Without dead ends: 307 [2021-12-14 19:54:52,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 19:54:52,922 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 334 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:52,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 208 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 223 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2021-12-14 19:54:52,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-12-14 19:54:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 288. [2021-12-14 19:54:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 264 states have (on average 1.1704545454545454) internal successors, (309), 273 states have internal predecessors, (309), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-14 19:54:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 327 transitions. [2021-12-14 19:54:52,925 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 327 transitions. Word has length 54 [2021-12-14 19:54:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:52,926 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 327 transitions. [2021-12-14 19:54:52,926 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) [2021-12-14 19:54:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 327 transitions. [2021-12-14 19:54:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-14 19:54:52,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:52,926 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] [2021-12-14 19:54:52,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-14 19:54:53,142 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,SelfDestructingSolverStorable34 [2021-12-14 19:54:53,143 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:53,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:53,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1889386740, now seen corresponding path program 2 times [2021-12-14 19:54:53,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:53,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943063226] [2021-12-14 19:54:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:53,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:53,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:53,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:54:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 19:54:53,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:53,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943063226] [2021-12-14 19:54:53,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943063226] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:53,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258817738] [2021-12-14 19:54:53,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:54:53,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:53,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:53,264 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) [2021-12-14 19:54:53,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-14 19:54:53,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:54:53,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:54:53,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 19:54:53,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:53,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:54:53,657 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 [2021-12-14 19:54:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 19:54:53,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:53,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258817738] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:53,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:54:53,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-12-14 19:54:53,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278062920] [2021-12-14 19:54:53,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:53,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 19:54:53,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:53,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 19:54:53,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-12-14 19:54:53,885 INFO L87 Difference]: Start difference. First operand 288 states and 327 transitions. Second operand has 18 states, 16 states have (on average 4.8125) internal successors, (77), 13 states have internal predecessors, (77), 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) [2021-12-14 19:54:54,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:54,361 INFO L93 Difference]: Finished difference Result 340 states and 373 transitions. [2021-12-14 19:54:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 19:54:54,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.8125) internal successors, (77), 13 states have internal predecessors, (77), 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 56 [2021-12-14 19:54:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:54,362 INFO L225 Difference]: With dead ends: 340 [2021-12-14 19:54:54,362 INFO L226 Difference]: Without dead ends: 340 [2021-12-14 19:54:54,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 19:54:54,363 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 512 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:54,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 332 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 339 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2021-12-14 19:54:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-12-14 19:54:54,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 288. [2021-12-14 19:54:54,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 264 states have (on average 1.1590909090909092) internal successors, (306), 273 states have internal predecessors, (306), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-14 19:54:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 324 transitions. [2021-12-14 19:54:54,366 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 324 transitions. Word has length 56 [2021-12-14 19:54:54,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:54,366 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 324 transitions. [2021-12-14 19:54:54,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.8125) internal successors, (77), 13 states have internal predecessors, (77), 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) [2021-12-14 19:54:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 324 transitions. [2021-12-14 19:54:54,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 19:54:54,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:54,367 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] [2021-12-14 19:54:54,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:54,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:54,583 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:54,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:54,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1842875129, now seen corresponding path program 1 times [2021-12-14 19:54:54,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:54,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725966175] [2021-12-14 19:54:54,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:54,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:54,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:54,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:54:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:54:54,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:54,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725966175] [2021-12-14 19:54:54,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725966175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:54,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253818732] [2021-12-14 19:54:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:54,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:54,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:54,873 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) [2021-12-14 19:54:54,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-14 19:54:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-14 19:54:54,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:55,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:54:55,167 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 [2021-12-14 19:54:55,304 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:54:55,305 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 [2021-12-14 19:54:55,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:54:55,432 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 [2021-12-14 19:54:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:55,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:55,692 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-14 19:54:55,693 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 [2021-12-14 19:54:55,955 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-14 19:54:55,955 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 [2021-12-14 19:54:56,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253818732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:56,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:54:56,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 25 [2021-12-14 19:54:56,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337466339] [2021-12-14 19:54:56,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:56,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-14 19:54:56,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:56,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-14 19:54:56,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 19:54:56,048 INFO L87 Difference]: Start difference. First operand 288 states and 324 transitions. Second operand has 27 states, 25 states have (on average 4.32) internal successors, (108), 22 states have internal predecessors, (108), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:54:57,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:57,404 INFO L93 Difference]: Finished difference Result 327 states and 359 transitions. [2021-12-14 19:54:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-14 19:54:57,404 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.32) internal successors, (108), 22 states have internal predecessors, (108), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2021-12-14 19:54:57,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:57,405 INFO L225 Difference]: With dead ends: 327 [2021-12-14 19:54:57,405 INFO L226 Difference]: Without dead ends: 327 [2021-12-14 19:54:57,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=871, Invalid=3419, Unknown=0, NotChecked=0, Total=4290 [2021-12-14 19:54:57,407 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 965 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:57,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [965 Valid, 327 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 566 Invalid, 0 Unknown, 158 Unchecked, 0.3s Time] [2021-12-14 19:54:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-14 19:54:57,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 285. [2021-12-14 19:54:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 264 states have (on average 1.143939393939394) internal successors, (302), 270 states have internal predecessors, (302), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-14 19:54:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 320 transitions. [2021-12-14 19:54:57,410 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 320 transitions. Word has length 59 [2021-12-14 19:54:57,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:57,410 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 320 transitions. [2021-12-14 19:54:57,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.32) internal successors, (108), 22 states have internal predecessors, (108), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 19:54:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 320 transitions. [2021-12-14 19:54:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-14 19:54:57,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:57,411 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] [2021-12-14 19:54:57,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:57,623 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,SelfDestructingSolverStorable36 [2021-12-14 19:54:57,624 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:57,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:57,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1294554201, now seen corresponding path program 1 times [2021-12-14 19:54:57,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:57,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597310350] [2021-12-14 19:54:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:57,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:57,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:57,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:54:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:54:57,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:54:57,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597310350] [2021-12-14 19:54:57,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597310350] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:57,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213652425] [2021-12-14 19:54:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:57,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:54:57,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:54:57,896 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) [2021-12-14 19:54:57,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-14 19:54:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:57,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-14 19:54:57,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:54:58,117 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 19:54:58,118 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 [2021-12-14 19:54:58,311 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-14 19:54:58,311 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 [2021-12-14 19:54:58,409 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 [2021-12-14 19:54:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:54:58,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:54:58,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213652425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:54:58,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:54:58,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-12-14 19:54:58,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835822796] [2021-12-14 19:54:58,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:54:58,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 19:54:58,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:54:58,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 19:54:58,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-12-14 19:54:58,518 INFO L87 Difference]: Start difference. First operand 285 states and 320 transitions. Second operand has 26 states, 24 states have (on average 4.5) internal successors, (108), 22 states have internal predecessors, (108), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:54:59,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:54:59,469 INFO L93 Difference]: Finished difference Result 322 states and 354 transitions. [2021-12-14 19:54:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-14 19:54:59,470 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.5) internal successors, (108), 22 states have internal predecessors, (108), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2021-12-14 19:54:59,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:54:59,471 INFO L225 Difference]: With dead ends: 322 [2021-12-14 19:54:59,471 INFO L226 Difference]: Without dead ends: 322 [2021-12-14 19:54:59,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=589, Invalid=2717, Unknown=0, NotChecked=0, Total=3306 [2021-12-14 19:54:59,472 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 481 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:54:59,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 277 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 436 Invalid, 0 Unknown, 198 Unchecked, 0.2s Time] [2021-12-14 19:54:59,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-12-14 19:54:59,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 284. [2021-12-14 19:54:59,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 264 states have (on average 1.1401515151515151) internal successors, (301), 269 states have internal predecessors, (301), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-14 19:54:59,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 319 transitions. [2021-12-14 19:54:59,475 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 319 transitions. Word has length 60 [2021-12-14 19:54:59,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:54:59,476 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 319 transitions. [2021-12-14 19:54:59,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.5) internal successors, (108), 22 states have internal predecessors, (108), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:54:59,476 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 319 transitions. [2021-12-14 19:54:59,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 19:54:59,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:54:59,476 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] [2021-12-14 19:54:59,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-14 19:54:59,690 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,SelfDestructingSolverStorable37 [2021-12-14 19:54:59,690 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:54:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:54:59,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1476474522, now seen corresponding path program 1 times [2021-12-14 19:54:59,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:54:59,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421303207] [2021-12-14 19:54:59,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:54:59,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:54:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:59,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:54:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:54:59,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:54:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:55:00,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:55:00,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421303207] [2021-12-14 19:55:00,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421303207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:55:00,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926227797] [2021-12-14 19:55:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:00,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:55:00,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:55:00,023 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) [2021-12-14 19:55:00,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-14 19:55:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:00,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-14 19:55:00,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:55:00,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:55:00,615 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 [2021-12-14 19:55:00,626 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 19:55:00,626 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 [2021-12-14 19:55:01,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:55:01,032 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 [2021-12-14 19:55:01,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-12-14 19:55:01,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:55:01,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-12-14 19:55:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:55:01,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:55:01,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926227797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:55:01,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:55:01,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 28 [2021-12-14 19:55:01,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958166394] [2021-12-14 19:55:01,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:55:01,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-14 19:55:01,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:55:01,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-14 19:55:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-12-14 19:55:01,494 INFO L87 Difference]: Start difference. First operand 284 states and 319 transitions. Second operand has 30 states, 28 states have (on average 4.0) internal successors, (112), 25 states have internal predecessors, (112), 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) [2021-12-14 19:55:04,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:55:04,466 INFO L93 Difference]: Finished difference Result 520 states and 572 transitions. [2021-12-14 19:55:04,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-14 19:55:04,467 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 4.0) internal successors, (112), 25 states have internal predecessors, (112), 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 61 [2021-12-14 19:55:04,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:55:04,468 INFO L225 Difference]: With dead ends: 520 [2021-12-14 19:55:04,468 INFO L226 Difference]: Without dead ends: 520 [2021-12-14 19:55:04,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1134, Invalid=6876, Unknown=0, NotChecked=0, Total=8010 [2021-12-14 19:55:04,469 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 717 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 19:55:04,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 424 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1040 Invalid, 0 Unknown, 195 Unchecked, 0.6s Time] [2021-12-14 19:55:04,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-12-14 19:55:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 283. [2021-12-14 19:55:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 264 states have (on average 1.1363636363636365) internal successors, (300), 268 states have internal predecessors, (300), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-14 19:55:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 318 transitions. [2021-12-14 19:55:04,476 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 318 transitions. Word has length 61 [2021-12-14 19:55:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:55:04,476 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 318 transitions. [2021-12-14 19:55:04,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 4.0) internal successors, (112), 25 states have internal predecessors, (112), 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) [2021-12-14 19:55:04,476 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 318 transitions. [2021-12-14 19:55:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 19:55:04,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:04,478 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] [2021-12-14 19:55:04,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-14 19:55:04,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-14 19:55:04,692 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:55:04,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:04,692 INFO L85 PathProgramCache]: Analyzing trace with hash 586619876, now seen corresponding path program 1 times [2021-12-14 19:55:04,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:55:04,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561942629] [2021-12-14 19:55:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:04,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:55:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:04,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:55:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:04,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:55:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:55:04,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:55:04,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561942629] [2021-12-14 19:55:04,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561942629] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:55:04,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187256655] [2021-12-14 19:55:04,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:04,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:55:04,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:55:04,791 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) [2021-12-14 19:55:04,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-14 19:55:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:04,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-14 19:55:04,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:55:04,886 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 [2021-12-14 19:55:05,011 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 19:55:05,011 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 [2021-12-14 19:55:05,038 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:55:05,038 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 [2021-12-14 19:55:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:05,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:55:05,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187256655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:55:05,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:55:05,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-12-14 19:55:05,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161778925] [2021-12-14 19:55:05,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:55:05,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 19:55:05,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:55:05,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 19:55:05,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:55:05,113 INFO L87 Difference]: Start difference. First operand 283 states and 318 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) [2021-12-14 19:55:05,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:55:05,256 INFO L93 Difference]: Finished difference Result 294 states and 328 transitions. [2021-12-14 19:55:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:55:05,257 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 [2021-12-14 19:55:05,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:55:05,257 INFO L225 Difference]: With dead ends: 294 [2021-12-14 19:55:05,257 INFO L226 Difference]: Without dead ends: 294 [2021-12-14 19:55:05,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-12-14 19:55:05,258 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 86 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:55:05,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 180 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 155 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2021-12-14 19:55:05,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-14 19:55:05,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 241. [2021-12-14 19:55:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 225 states have (on average 1.1333333333333333) internal successors, (255), 228 states have internal predecessors, (255), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-14 19:55:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 271 transitions. [2021-12-14 19:55:05,261 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 271 transitions. Word has length 66 [2021-12-14 19:55:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:55:05,261 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 271 transitions. [2021-12-14 19:55:05,261 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) [2021-12-14 19:55:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 271 transitions. [2021-12-14 19:55:05,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 19:55:05,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:05,261 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:55:05,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-14 19:55:05,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-14 19:55:05,462 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:55:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:05,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1008566956, now seen corresponding path program 1 times [2021-12-14 19:55:05,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:55:05,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111342274] [2021-12-14 19:55:05,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:05,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:55:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:05,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:55:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:05,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:55:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:05,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 19:55:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-14 19:55:05,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:55:05,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111342274] [2021-12-14 19:55:05,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111342274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:55:05,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:55:05,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:55:05,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705488385] [2021-12-14 19:55:05,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:55:05,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:55:05,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:55:05,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:55:05,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:55:05,514 INFO L87 Difference]: Start difference. First operand 241 states and 271 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-14 19:55:05,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:55:05,551 INFO L93 Difference]: Finished difference Result 249 states and 278 transitions. [2021-12-14 19:55:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:55:05,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 67 [2021-12-14 19:55:05,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:55:05,552 INFO L225 Difference]: With dead ends: 249 [2021-12-14 19:55:05,552 INFO L226 Difference]: Without dead ends: 240 [2021-12-14 19:55:05,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:55:05,552 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:55:05,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 64 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:55:05,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-14 19:55:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 234. [2021-12-14 19:55:05,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 218 states have (on average 1.1238532110091743) internal successors, (245), 221 states have internal predecessors, (245), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-14 19:55:05,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 261 transitions. [2021-12-14 19:55:05,555 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 261 transitions. Word has length 67 [2021-12-14 19:55:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:55:05,555 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 261 transitions. [2021-12-14 19:55:05,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-14 19:55:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 261 transitions. [2021-12-14 19:55:05,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 19:55:05,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:05,555 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] [2021-12-14 19:55:05,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-14 19:55:05,555 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:55:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash 272552823, now seen corresponding path program 1 times [2021-12-14 19:55:05,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:55:05,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465582556] [2021-12-14 19:55:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:05,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:55:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 19:55:05,568 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 19:55:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 19:55:05,606 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 19:55:05,607 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 19:55:05,607 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2021-12-14 19:55:05,608 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATION (18 of 20 remaining) [2021-12-14 19:55:05,608 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATION (17 of 20 remaining) [2021-12-14 19:55:05,608 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2021-12-14 19:55:05,608 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2021-12-14 19:55:05,608 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2021-12-14 19:55:05,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2021-12-14 19:55:05,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATION (12 of 20 remaining) [2021-12-14 19:55:05,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATION (11 of 20 remaining) [2021-12-14 19:55:05,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATION (10 of 20 remaining) [2021-12-14 19:55:05,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATION (9 of 20 remaining) [2021-12-14 19:55:05,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2021-12-14 19:55:05,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2021-12-14 19:55:05,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2021-12-14 19:55:05,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2021-12-14 19:55:05,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2021-12-14 19:55:05,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2021-12-14 19:55:05,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2021-12-14 19:55:05,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2021-12-14 19:55:05,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2021-12-14 19:55:05,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-14 19:55:05,612 INFO L732 BasicCegarLoop]: Path program histogram: [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] [2021-12-14 19:55:05,614 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 19:55:05,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 07:55:05 BoogieIcfgContainer [2021-12-14 19:55:05,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 19:55:05,674 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 19:55:05,674 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 19:55:05,674 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 19:55:05,675 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:54:23" (3/4) ... [2021-12-14 19:55:05,677 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-14 19:55:05,677 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 19:55:05,677 INFO L158 Benchmark]: Toolchain (without parser) took 42921.97ms. Allocated memory was 104.9MB in the beginning and 283.1MB in the end (delta: 178.3MB). Free memory was 75.2MB in the beginning and 202.5MB in the end (delta: -127.3MB). Peak memory consumption was 50.4MB. Max. memory is 16.1GB. [2021-12-14 19:55:05,677 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 104.9MB. Free memory was 62.3MB in the beginning and 62.2MB in the end (delta: 47.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 19:55:05,677 INFO L158 Benchmark]: CACSL2BoogieTranslator took 332.18ms. Allocated memory is still 104.9MB. Free memory was 75.0MB in the beginning and 71.0MB in the end (delta: 4.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-14 19:55:05,677 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.68ms. Allocated memory is still 104.9MB. Free memory was 71.0MB in the beginning and 68.7MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 19:55:05,677 INFO L158 Benchmark]: Boogie Preprocessor took 41.88ms. Allocated memory is still 104.9MB. Free memory was 68.7MB in the beginning and 67.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 19:55:05,677 INFO L158 Benchmark]: RCFGBuilder took 308.68ms. Allocated memory is still 104.9MB. Free memory was 67.3MB in the beginning and 54.0MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-14 19:55:05,677 INFO L158 Benchmark]: TraceAbstraction took 42187.08ms. Allocated memory was 104.9MB in the beginning and 283.1MB in the end (delta: 178.3MB). Free memory was 53.2MB in the beginning and 202.5MB in the end (delta: -149.3MB). Peak memory consumption was 31.9MB. Max. memory is 16.1GB. [2021-12-14 19:55:05,677 INFO L158 Benchmark]: Witness Printer took 2.47ms. Allocated memory is still 283.1MB. Free memory is still 202.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 19:55:05,682 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 104.9MB. Free memory was 62.3MB in the beginning and 62.2MB in the end (delta: 47.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 332.18ms. Allocated memory is still 104.9MB. Free memory was 75.0MB in the beginning and 71.0MB in the end (delta: 4.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.68ms. Allocated memory is still 104.9MB. Free memory was 71.0MB in the beginning and 68.7MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.88ms. Allocated memory is still 104.9MB. Free memory was 68.7MB in the beginning and 67.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 308.68ms. Allocated memory is still 104.9MB. Free memory was 67.3MB in the beginning and 54.0MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 42187.08ms. Allocated memory was 104.9MB in the beginning and 283.1MB in the end (delta: 178.3MB). Free memory was 53.2MB in the beginning and 202.5MB in the end (delta: -149.3MB). Peak memory consumption was 31.9MB. Max. memory is 16.1GB. * Witness Printer took 2.47ms. Allocated memory is still 283.1MB. Free memory is still 202.5MB. 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: 721]: 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 721. 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] [L722] 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 FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, 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=1, 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={2:0}, global={0:0}, i=1, 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={2:0}, global={0:0}, i=1, 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={2:0}, global={0:0}, i=1, 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={2:0}, global={0:0}, i=1, 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={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L722] RET parse_input("c1") 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, 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={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, 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={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, 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={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, 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={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L723] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L724] CALL parse_input("c2") 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={-3:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={-3:0}, state=1, x={-3:0}] [L695] RET commands[i].function() [L724] RET parse_input("c2") VAL [commands={6:0}, global={-3:0}, state=1] [L725] return 0; VAL [\result=0, commands={6:0}, global={-3:0}, 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: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: 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: 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, 61 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 42.1s, OverallIterations: 42, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 14.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12357 SdHoareTripleChecker+Valid, 5.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12356 mSDsluCounter, 9622 SdHoareTripleChecker+Invalid, 4.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1551 IncrementalHoareTripleChecker+Unchecked, 7613 mSDsCounter, 1827 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9940 IncrementalHoareTripleChecker+Invalid, 13318 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1827 mSolverCounterUnsat, 2009 mSDtfsCounter, 9940 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2853 GetRequests, 1971 SyntacticMatches, 39 SemanticMatches, 843 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8800 ImplicationChecksByTransitivity, 13.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=486occurred in iteration=20, InterpolantAutomatonStates: 553, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 41 MinimizatonAttempts, 2414 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 17.4s InterpolantComputationTime, 3025 NumberOfCodeBlocks, 3025 NumberOfCodeBlocksAsserted, 75 NumberOfCheckSat, 3407 ConstructedInterpolants, 174 QuantifiedInterpolants, 37532 SizeOfPredicates, 127 NumberOfNonLiveVariables, 8629 ConjunctsInSsa, 561 ConjunctsInUnsatCore, 87 InterpolantComputations, 16 PerfectInterpolantSequences, 1399/2415 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 [2021-12-14 19:55:05,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:55:07,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:55:07,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:55:07,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:55:07,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:55:07,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:55:07,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:55:07,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:55:07,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:55:07,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:55:07,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:55:07,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:55:07,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:55:07,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:55:07,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:55:07,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:55:07,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:55:07,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:55:07,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:55:07,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:55:07,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:55:07,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:55:07,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:55:07,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:55:07,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:55:07,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:55:07,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:55:07,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:55:07,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:55:07,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:55:07,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:55:07,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:55:07,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:55:07,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:55:07,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:55:07,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:55:07,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:55:07,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:55:07,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:55:07,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:55:07,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:55:07,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-14 19:55:07,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:55:07,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:55:07,365 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:55:07,365 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:55:07,365 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:55:07,366 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:55:07,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:55:07,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:55:07,367 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:55:07,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:55:07,367 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:55:07,368 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:55:07,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:55:07,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:55:07,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:55:07,368 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:55:07,368 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:55:07,369 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:55:07,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:55:07,369 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:55:07,369 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-14 19:55:07,369 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-14 19:55:07,369 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:55:07,369 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:55:07,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:55:07,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:55:07,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:55:07,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:55:07,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:55:07,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:55:07,371 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-14 19:55:07,371 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-14 19:55:07,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:55:07,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-14 19:55:07,371 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2021-12-14 19:55:07,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:55:07,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:55:07,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:55:07,626 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:55:07,627 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:55:07,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-12-14 19:55:07,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c40a85e6/7919df83422840e0b21304c92567e167/FLAGa39cd7579 [2021-12-14 19:55:08,098 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:55:08,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-12-14 19:55:08,107 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c40a85e6/7919df83422840e0b21304c92567e167/FLAGa39cd7579 [2021-12-14 19:55:08,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c40a85e6/7919df83422840e0b21304c92567e167 [2021-12-14 19:55:08,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:55:08,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:55:08,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:55:08,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:55:08,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:55:08,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:55:08" (1/1) ... [2021-12-14 19:55:08,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b47cdae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:55:08, skipping insertion in model container [2021-12-14 19:55:08,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:55:08" (1/1) ... [2021-12-14 19:55:08,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:55:08,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:55:08,405 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:55:08,414 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:55:08,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:55:08,473 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:55:08,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:55:08 WrapperNode [2021-12-14 19:55:08,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:55:08,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:55:08,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:55:08,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:55:08,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:55:08" (1/1) ... [2021-12-14 19:55:08,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:55:08" (1/1) ... [2021-12-14 19:55:08,509 INFO L137 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2021-12-14 19:55:08,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:55:08,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:55:08,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:55:08,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:55:08,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:55:08" (1/1) ... [2021-12-14 19:55:08,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:55:08" (1/1) ... [2021-12-14 19:55:08,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:55:08" (1/1) ... [2021-12-14 19:55:08,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:55:08" (1/1) ... [2021-12-14 19:55:08,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:55:08" (1/1) ... [2021-12-14 19:55:08,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:55:08" (1/1) ... [2021-12-14 19:55:08,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:55:08" (1/1) ... [2021-12-14 19:55:08,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:55:08,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:55:08,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:55:08,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:55:08,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:55:08" (1/1) ... [2021-12-14 19:55:08,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:55:08,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:55:08,555 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) [2021-12-14 19:55:08,565 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 [2021-12-14 19:55:08,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-14 19:55:08,585 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-12-14 19:55:08,585 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-12-14 19:55:08,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 19:55:08,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 19:55:08,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 19:55:08,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:55:08,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 19:55:08,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-14 19:55:08,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:55:08,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:55:08,682 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:55:08,683 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:55:08,907 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:55:08,911 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:55:08,912 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 19:55:08,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:55:08 BoogieIcfgContainer [2021-12-14 19:55:08,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:55:08,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:55:08,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:55:08,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:55:08,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:55:08" (1/3) ... [2021-12-14 19:55:08,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a39301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:55:08, skipping insertion in model container [2021-12-14 19:55:08,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:55:08" (2/3) ... [2021-12-14 19:55:08,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a39301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:55:08, skipping insertion in model container [2021-12-14 19:55:08,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:55:08" (3/3) ... [2021-12-14 19:55:08,921 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2021-12-14 19:55:08,925 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:55:08,925 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-12-14 19:55:08,963 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:55:08,970 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 [2021-12-14 19:55:08,970 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-12-14 19:55:08,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 19:55:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 19:55:08,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:08,987 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 19:55:08,988 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:55:08,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:08,991 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2021-12-14 19:55:09,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:55:09,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23130311] [2021-12-14 19:55:09,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:09,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:55:09,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:55:09,005 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) [2021-12-14 19:55:09,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-14 19:55:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:09,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 19:55:09,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:55:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:09,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:55:09,202 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:55:09,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23130311] [2021-12-14 19:55:09,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23130311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:55:09,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:55:09,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-14 19:55:09,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102317338] [2021-12-14 19:55:09,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:55:09,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:55:09,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:55:09,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:55:09,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:55:09,235 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:55:09,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:55:09,369 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2021-12-14 19:55:09,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:55:09,371 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 [2021-12-14 19:55:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:55:09,377 INFO L225 Difference]: With dead ends: 110 [2021-12-14 19:55:09,377 INFO L226 Difference]: Without dead ends: 106 [2021-12-14 19:55:09,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:55:09,380 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 52 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:55:09,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:55:09,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-14 19:55:09,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2021-12-14 19:55:09,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 76 states have internal predecessors, (97), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-14 19:55:09,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2021-12-14 19:55:09,424 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 6 [2021-12-14 19:55:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:55:09,425 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2021-12-14 19:55:09,425 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) [2021-12-14 19:55:09,425 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2021-12-14 19:55:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 19:55:09,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:09,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 19:55:09,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-14 19:55:09,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:55:09,635 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:55:09,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:09,636 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2021-12-14 19:55:09,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:55:09,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386605298] [2021-12-14 19:55:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:09,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:55:09,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:55:09,638 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) [2021-12-14 19:55:09,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-14 19:55:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:09,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 19:55:09,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:55:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:09,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:55:09,776 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:55:09,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386605298] [2021-12-14 19:55:09,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386605298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:55:09,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:55:09,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:55:09,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375784121] [2021-12-14 19:55:09,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:55:09,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:55:09,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:55:09,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:55:09,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:55:09,781 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:55:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:55:09,950 INFO L93 Difference]: Finished difference Result 206 states and 278 transitions. [2021-12-14 19:55:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:55:09,951 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 [2021-12-14 19:55:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:55:09,952 INFO L225 Difference]: With dead ends: 206 [2021-12-14 19:55:09,952 INFO L226 Difference]: Without dead ends: 206 [2021-12-14 19:55:09,952 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 [2021-12-14 19:55:09,953 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 125 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:55:09,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 142 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:55:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-14 19:55:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2021-12-14 19:55:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 119 states have (on average 1.7394957983193278) internal successors, (207), 138 states have internal predecessors, (207), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-14 19:55:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 238 transitions. [2021-12-14 19:55:09,966 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 238 transitions. Word has length 6 [2021-12-14 19:55:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:55:09,966 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 238 transitions. [2021-12-14 19:55:09,967 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) [2021-12-14 19:55:09,967 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 238 transitions. [2021-12-14 19:55:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 19:55:09,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:09,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:55:09,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-14 19:55:10,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:55:10,174 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 16 more)] === [2021-12-14 19:55:10,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:10,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2021-12-14 19:55:10,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:55:10,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27399061] [2021-12-14 19:55:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:10,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:55:10,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:55:10,177 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) [2021-12-14 19:55:10,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-14 19:55:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:10,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 19:55:10,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:55:10,347 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 [2021-12-14 19:55:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:10,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:55:10,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:55:10,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27399061] [2021-12-14 19:55:10,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27399061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:55:10,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:55:10,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:55:10,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039434077] [2021-12-14 19:55:10,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:55:10,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:55:10,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:55:10,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:55:10,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:55:10,358 INFO L87 Difference]: Start difference. First operand 152 states and 238 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:55:10,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:55:10,554 INFO L93 Difference]: Finished difference Result 228 states and 325 transitions. [2021-12-14 19:55:10,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:55:10,555 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 [2021-12-14 19:55:10,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:55:10,557 INFO L225 Difference]: With dead ends: 228 [2021-12-14 19:55:10,557 INFO L226 Difference]: Without dead ends: 228 [2021-12-14 19:55:10,557 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 [2021-12-14 19:55:10,558 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 136 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:55:10,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 164 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:55:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-14 19:55:10,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2021-12-14 19:55:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.721311475409836) internal successors, (210), 141 states have internal predecessors, (210), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-14 19:55:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 241 transitions. [2021-12-14 19:55:10,568 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 241 transitions. Word has length 7 [2021-12-14 19:55:10,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:55:10,569 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 241 transitions. [2021-12-14 19:55:10,569 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) [2021-12-14 19:55:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 241 transitions. [2021-12-14 19:55:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:55:10,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:10,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:55:10,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-14 19:55:10,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:55:10,776 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 16 more)] === [2021-12-14 19:55:10,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:10,777 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2021-12-14 19:55:10,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:55:10,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581189157] [2021-12-14 19:55:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:10,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:55:10,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:55:10,778 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) [2021-12-14 19:55:10,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-14 19:55:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:10,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 19:55:10,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:55:10,921 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 [2021-12-14 19:55:10,924 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 [2021-12-14 19:55:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:10,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:55:10,952 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:55:10,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581189157] [2021-12-14 19:55:10,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581189157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:55:10,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:55:10,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:55:10,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184191689] [2021-12-14 19:55:10,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:55:10,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:55:10,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:55:10,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:55:10,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:55:10,959 INFO L87 Difference]: Start difference. First operand 155 states and 241 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:55:11,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:55:11,126 INFO L93 Difference]: Finished difference Result 208 states and 279 transitions. [2021-12-14 19:55:11,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:55:11,127 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 [2021-12-14 19:55:11,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:55:11,128 INFO L225 Difference]: With dead ends: 208 [2021-12-14 19:55:11,128 INFO L226 Difference]: Without dead ends: 208 [2021-12-14 19:55:11,129 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 [2021-12-14 19:55:11,129 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 128 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:55:11,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 190 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:55:11,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-14 19:55:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2021-12-14 19:55:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.7049180327868851) internal successors, (208), 141 states have internal predecessors, (208), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-14 19:55:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 239 transitions. [2021-12-14 19:55:11,149 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 239 transitions. Word has length 8 [2021-12-14 19:55:11,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:55:11,149 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 239 transitions. [2021-12-14 19:55:11,149 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) [2021-12-14 19:55:11,149 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 239 transitions. [2021-12-14 19:55:11,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 19:55:11,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:11,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:55:11,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-14 19:55:11,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:55:11,350 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 16 more)] === [2021-12-14 19:55:11,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:11,351 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2021-12-14 19:55:11,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:55:11,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834218152] [2021-12-14 19:55:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:11,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:55:11,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:55:11,352 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) [2021-12-14 19:55:11,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-14 19:55:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:11,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 19:55:11,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:55:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:11,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:55:11,436 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:55:11,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834218152] [2021-12-14 19:55:11,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834218152] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:55:11,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:55:11,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:55:11,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922910923] [2021-12-14 19:55:11,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:55:11,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:55:11,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:55:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:55:11,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:55:11,438 INFO L87 Difference]: Start difference. First operand 155 states and 239 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:55:11,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:55:11,553 INFO L93 Difference]: Finished difference Result 234 states and 321 transitions. [2021-12-14 19:55:11,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:55:11,553 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 [2021-12-14 19:55:11,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:55:11,554 INFO L225 Difference]: With dead ends: 234 [2021-12-14 19:55:11,554 INFO L226 Difference]: Without dead ends: 234 [2021-12-14 19:55:11,555 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 [2021-12-14 19:55:11,555 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 140 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:55:11,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 183 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:55:11,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-14 19:55:11,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 191. [2021-12-14 19:55:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 156 states have (on average 1.6538461538461537) internal successors, (258), 176 states have internal predecessors, (258), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-14 19:55:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 289 transitions. [2021-12-14 19:55:11,563 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 289 transitions. Word has length 9 [2021-12-14 19:55:11,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:55:11,563 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 289 transitions. [2021-12-14 19:55:11,563 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) [2021-12-14 19:55:11,563 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 289 transitions. [2021-12-14 19:55:11,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 19:55:11,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:11,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:55:11,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-14 19:55:11,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:55:11,770 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 16 more)] === [2021-12-14 19:55:11,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:11,770 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2021-12-14 19:55:11,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:55:11,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514813077] [2021-12-14 19:55:11,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:11,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:55:11,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:55:11,772 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) [2021-12-14 19:55:11,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-14 19:55:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:11,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 19:55:11,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:55:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:11,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:55:11,899 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:55:11,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514813077] [2021-12-14 19:55:11,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514813077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:55:11,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:55:11,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:55:11,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762983730] [2021-12-14 19:55:11,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:55:11,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:55:11,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:55:11,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:55:11,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:55:11,902 INFO L87 Difference]: Start difference. First operand 191 states and 289 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:55:12,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:55:12,038 INFO L93 Difference]: Finished difference Result 231 states and 304 transitions. [2021-12-14 19:55:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:55:12,039 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 [2021-12-14 19:55:12,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:55:12,040 INFO L225 Difference]: With dead ends: 231 [2021-12-14 19:55:12,040 INFO L226 Difference]: Without dead ends: 231 [2021-12-14 19:55:12,040 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 [2021-12-14 19:55:12,040 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:55:12,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 227 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:55:12,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-14 19:55:12,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2021-12-14 19:55:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 186 states have internal predecessors, (271), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-14 19:55:12,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 302 transitions. [2021-12-14 19:55:12,047 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 302 transitions. Word has length 10 [2021-12-14 19:55:12,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:55:12,048 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 302 transitions. [2021-12-14 19:55:12,048 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) [2021-12-14 19:55:12,048 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 302 transitions. [2021-12-14 19:55:12,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 19:55:12,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:12,048 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:55:12,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-14 19:55:12,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:55:12,255 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:55:12,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:12,255 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2021-12-14 19:55:12,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:55:12,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858360750] [2021-12-14 19:55:12,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:12,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:55:12,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:55:12,257 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) [2021-12-14 19:55:12,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-14 19:55:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:12,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 19:55:12,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:55:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:12,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:55:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:12,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:55:12,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858360750] [2021-12-14 19:55:12,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858360750] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:55:12,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:55:12,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-12-14 19:55:12,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529204459] [2021-12-14 19:55:12,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:55:12,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:55:12,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:55:12,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:55:12,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:55:12,798 INFO L87 Difference]: Start difference. First operand 201 states and 302 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:55:13,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:55:13,168 INFO L93 Difference]: Finished difference Result 367 states and 495 transitions. [2021-12-14 19:55:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:55:13,170 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 [2021-12-14 19:55:13,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:55:13,171 INFO L225 Difference]: With dead ends: 367 [2021-12-14 19:55:13,171 INFO L226 Difference]: Without dead ends: 367 [2021-12-14 19:55:13,171 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 [2021-12-14 19:55:13,172 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 258 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:55:13,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 312 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:55:13,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-14 19:55:13,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 239. [2021-12-14 19:55:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 200 states have (on average 1.62) internal successors, (324), 224 states have internal predecessors, (324), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-14 19:55:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 363 transitions. [2021-12-14 19:55:13,189 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 363 transitions. Word has length 14 [2021-12-14 19:55:13,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:55:13,189 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 363 transitions. [2021-12-14 19:55:13,189 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) [2021-12-14 19:55:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 363 transitions. [2021-12-14 19:55:13,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-14 19:55:13,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:13,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:55:13,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-14 19:55:13,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:55:13,397 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 16 more)] === [2021-12-14 19:55:13,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:13,397 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2021-12-14 19:55:13,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:55:13,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63224057] [2021-12-14 19:55:13,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:13,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:55:13,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:55:13,399 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) [2021-12-14 19:55:13,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-14 19:55:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:13,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 19:55:13,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:55:13,608 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 [2021-12-14 19:55:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:13,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:55:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:13,726 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:55:13,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63224057] [2021-12-14 19:55:13,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63224057] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:55:13,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:55:13,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-12-14 19:55:13,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892725373] [2021-12-14 19:55:13,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:55:13,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:55:13,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:55:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:55:13,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:55:13,728 INFO L87 Difference]: Start difference. First operand 239 states and 363 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:55:14,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:55:14,031 INFO L93 Difference]: Finished difference Result 405 states and 567 transitions. [2021-12-14 19:55:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:55:14,032 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 [2021-12-14 19:55:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:55:14,033 INFO L225 Difference]: With dead ends: 405 [2021-12-14 19:55:14,033 INFO L226 Difference]: Without dead ends: 405 [2021-12-14 19:55:14,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:55:14,034 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 267 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:55:14,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 323 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:55:14,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-14 19:55:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 249. [2021-12-14 19:55:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 210 states have (on average 1.6142857142857143) internal successors, (339), 234 states have internal predecessors, (339), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-14 19:55:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 378 transitions. [2021-12-14 19:55:14,042 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 378 transitions. Word has length 15 [2021-12-14 19:55:14,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:55:14,042 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 378 transitions. [2021-12-14 19:55:14,042 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) [2021-12-14 19:55:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 378 transitions. [2021-12-14 19:55:14,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 19:55:14,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:14,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:55:14,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-14 19:55:14,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:55:14,250 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 16 more)] === [2021-12-14 19:55:14,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:14,250 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2021-12-14 19:55:14,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:55:14,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070098960] [2021-12-14 19:55:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:14,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:55:14,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:55:14,252 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) [2021-12-14 19:55:14,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-14 19:55:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:14,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 19:55:14,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:55:14,495 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 [2021-12-14 19:55:14,501 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 [2021-12-14 19:55:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:14,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:55:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:14,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:55:14,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070098960] [2021-12-14 19:55:14,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070098960] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:55:14,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:55:14,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-12-14 19:55:14,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127378093] [2021-12-14 19:55:14,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:55:14,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:55:14,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:55:14,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:55:14,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:55:14,658 INFO L87 Difference]: Start difference. First operand 249 states and 378 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:55:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:55:15,453 INFO L93 Difference]: Finished difference Result 626 states and 845 transitions. [2021-12-14 19:55:15,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 19:55:15,454 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 [2021-12-14 19:55:15,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:55:15,456 INFO L225 Difference]: With dead ends: 626 [2021-12-14 19:55:15,456 INFO L226 Difference]: Without dead ends: 626 [2021-12-14 19:55:15,457 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 [2021-12-14 19:55:15,457 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 460 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 19:55:15,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 606 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 19:55:15,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-12-14 19:55:15,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 349. [2021-12-14 19:55:15,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 303 states have (on average 1.6336633663366336) internal successors, (495), 330 states have internal predecessors, (495), 11 states have call successors, (11), 7 states have call predecessors, (11), 15 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2021-12-14 19:55:15,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 548 transitions. [2021-12-14 19:55:15,468 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 548 transitions. Word has length 16 [2021-12-14 19:55:15,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:55:15,469 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 548 transitions. [2021-12-14 19:55:15,469 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) [2021-12-14 19:55:15,469 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 548 transitions. [2021-12-14 19:55:15,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 19:55:15,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:15,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:55:15,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-14 19:55:15,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:55:15,676 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 16 more)] === [2021-12-14 19:55:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:15,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2021-12-14 19:55:15,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:55:15,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655966234] [2021-12-14 19:55:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:15,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:55:15,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:55:15,679 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) [2021-12-14 19:55:15,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-14 19:55:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:15,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 19:55:15,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:55:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:15,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:55:15,811 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:55:15,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655966234] [2021-12-14 19:55:15,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655966234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:55:15,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:55:15,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:55:15,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064433234] [2021-12-14 19:55:15,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:55:15,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:55:15,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:55:15,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:55:15,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:55:15,813 INFO L87 Difference]: Start difference. First operand 349 states and 548 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:55:15,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:55:15,834 INFO L93 Difference]: Finished difference Result 378 states and 554 transitions. [2021-12-14 19:55:15,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:55:15,835 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 [2021-12-14 19:55:15,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:55:15,837 INFO L225 Difference]: With dead ends: 378 [2021-12-14 19:55:15,837 INFO L226 Difference]: Without dead ends: 378 [2021-12-14 19:55:15,837 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 [2021-12-14 19:55:15,837 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 27 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:55:15,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 118 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:55:15,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-12-14 19:55:15,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 367. [2021-12-14 19:55:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 318 states have (on average 1.5628930817610063) internal successors, (497), 347 states have internal predecessors, (497), 11 states have call successors, (11), 8 states have call predecessors, (11), 18 states have return successors, (43), 11 states have call predecessors, (43), 11 states have call successors, (43) [2021-12-14 19:55:15,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 551 transitions. [2021-12-14 19:55:15,849 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 551 transitions. Word has length 18 [2021-12-14 19:55:15,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:55:15,849 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 551 transitions. [2021-12-14 19:55:15,849 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) [2021-12-14 19:55:15,849 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 551 transitions. [2021-12-14 19:55:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 19:55:15,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:15,850 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-14 19:55:15,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-14 19:55:16,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:55:16,057 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:55:16,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:16,057 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 2 times [2021-12-14 19:55:16,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:55:16,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322502109] [2021-12-14 19:55:16,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:55:16,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:55:16,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:55:16,058 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) [2021-12-14 19:55:16,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-14 19:55:16,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:55:16,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:55:16,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 19:55:16,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:55:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:16,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:55:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:17,009 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:55:17,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322502109] [2021-12-14 19:55:17,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322502109] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:55:17,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:55:17,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-12-14 19:55:17,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784419410] [2021-12-14 19:55:17,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:55:17,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:55:17,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:55:17,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:55:17,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:55:17,011 INFO L87 Difference]: Start difference. First operand 367 states and 551 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:55:18,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:55:18,884 INFO L93 Difference]: Finished difference Result 620 states and 878 transitions. [2021-12-14 19:55:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 19:55:18,886 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 [2021-12-14 19:55:18,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:55:18,888 INFO L225 Difference]: With dead ends: 620 [2021-12-14 19:55:18,888 INFO L226 Difference]: Without dead ends: 620 [2021-12-14 19:55:18,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:55:18,888 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 458 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:55:18,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 360 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 19:55:18,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-12-14 19:55:18,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 402. [2021-12-14 19:55:18,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 354 states have (on average 1.612994350282486) internal successors, (571), 382 states have internal predecessors, (571), 11 states have call successors, (11), 8 states have call predecessors, (11), 17 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2021-12-14 19:55:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 618 transitions. [2021-12-14 19:55:18,900 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 618 transitions. Word has length 22 [2021-12-14 19:55:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:55:18,901 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 618 transitions. [2021-12-14 19:55:18,901 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) [2021-12-14 19:55:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 618 transitions. [2021-12-14 19:55:18,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 19:55:18,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:18,904 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] [2021-12-14 19:55:18,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-14 19:55:19,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:55:19,112 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:55:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:19,112 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2021-12-14 19:55:19,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:55:19,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865480591] [2021-12-14 19:55:19,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:19,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:55:19,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:55:19,114 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) [2021-12-14 19:55:19,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-14 19:55:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:19,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 19:55:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:55:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:19,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:55:19,204 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:55:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865480591] [2021-12-14 19:55:19,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865480591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:55:19,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:55:19,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:55:19,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780971128] [2021-12-14 19:55:19,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:55:19,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:55:19,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:55:19,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:55:19,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:55:19,205 INFO L87 Difference]: Start difference. First operand 402 states and 618 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 19:55:19,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:55:19,210 INFO L93 Difference]: Finished difference Result 303 states and 456 transitions. [2021-12-14 19:55:19,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:55:19,210 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 [2021-12-14 19:55:19,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:55:19,211 INFO L225 Difference]: With dead ends: 303 [2021-12-14 19:55:19,211 INFO L226 Difference]: Without dead ends: 303 [2021-12-14 19:55:19,212 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 [2021-12-14 19:55:19,212 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:55:19,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:55:19,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-12-14 19:55:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2021-12-14 19:55:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 263 states have (on average 1.6121673003802282) internal successors, (424), 288 states have internal predecessors, (424), 8 states have call successors, (8), 6 states have call predecessors, (8), 12 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-12-14 19:55:19,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 456 transitions. [2021-12-14 19:55:19,218 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 456 transitions. Word has length 25 [2021-12-14 19:55:19,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:55:19,219 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 456 transitions. [2021-12-14 19:55:19,219 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) [2021-12-14 19:55:19,219 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 456 transitions. [2021-12-14 19:55:19,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-14 19:55:19,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:55:19,221 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] [2021-12-14 19:55:19,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-14 19:55:19,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:55:19,428 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-14 19:55:19,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:55:19,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2021-12-14 19:55:19,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:55:19,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712030581] [2021-12-14 19:55:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:55:19,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:55:19,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:55:19,431 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) [2021-12-14 19:55:19,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-14 19:55:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:55:19,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 19:55:19,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:55:21,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:55:21,858 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 [2021-12-14 19:55:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:55:21,922 INFO L328 TraceCheckSpWp]: Computing backward predicates...