./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 ff03de63 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-dev-ff03de6 [2021-12-21 18:20:44,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:20:44,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:20:44,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:20:44,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:20:44,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:20:44,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:20:44,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:20:44,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:20:44,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:20:44,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:20:44,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:20:44,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:20:44,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:20:44,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:20:44,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:20:45,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:20:45,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:20:45,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:20:45,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:20:45,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:20:45,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:20:45,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:20:45,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:20:45,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:20:45,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:20:45,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:20:45,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:20:45,020 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:20:45,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:20:45,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:20:45,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:20:45,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:20:45,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:20:45,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:20:45,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:20:45,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:20:45,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:20:45,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:20:45,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:20:45,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:20:45,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:20:45,055 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:20:45,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:20:45,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:20:45,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:20:45,056 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:20:45,057 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:20:45,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:20:45,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:20:45,057 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:20:45,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:20:45,058 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:20:45,058 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:20:45,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:20:45,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:20:45,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:20:45,059 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:20:45,059 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:20:45,059 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:20:45,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:20:45,059 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:20:45,059 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:20:45,060 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:20:45,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:20:45,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:20:45,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:20:45,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:20:45,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:20:45,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:20:45,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:20:45,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:20:45,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:20:45,063 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2021-12-21 18:20:45,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:20:45,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:20:45,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:20:45,291 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:20:45,292 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:20:45,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-12-21 18:20:45,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5ac4f766/7eb344bdb9d742608bd0673ef4ba1af0/FLAG10cac0c70 [2021-12-21 18:20:45,788 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:20:45,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-12-21 18:20:45,803 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5ac4f766/7eb344bdb9d742608bd0673ef4ba1af0/FLAG10cac0c70 [2021-12-21 18:20:45,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5ac4f766/7eb344bdb9d742608bd0673ef4ba1af0 [2021-12-21 18:20:45,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:20:45,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:20:45,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:20:45,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:20:45,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:20:45,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:20:45" (1/1) ... [2021-12-21 18:20:45,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3232f756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:20:45, skipping insertion in model container [2021-12-21 18:20:45,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:20:45" (1/1) ... [2021-12-21 18:20:45,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:20:45,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:20:46,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:20:46,107 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:20:46,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:20:46,177 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:20:46,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:20:46 WrapperNode [2021-12-21 18:20:46,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:20:46,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:20:46,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:20:46,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:20:46,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:20:46" (1/1) ... [2021-12-21 18:20:46,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:20:46" (1/1) ... [2021-12-21 18:20:46,240 INFO L137 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2021-12-21 18:20:46,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:20:46,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:20:46,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:20:46,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:20:46,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:20:46" (1/1) ... [2021-12-21 18:20:46,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:20:46" (1/1) ... [2021-12-21 18:20:46,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:20:46" (1/1) ... [2021-12-21 18:20:46,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:20:46" (1/1) ... [2021-12-21 18:20:46,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:20:46" (1/1) ... [2021-12-21 18:20:46,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:20:46" (1/1) ... [2021-12-21 18:20:46,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:20:46" (1/1) ... [2021-12-21 18:20:46,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:20:46,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:20:46,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:20:46,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:20:46,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:20:46" (1/1) ... [2021-12-21 18:20:46,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:20:46,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:20:46,301 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) [2021-12-21 18:20:46,319 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 [2021-12-21 18:20:46,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 18:20:46,330 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-12-21 18:20:46,331 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-12-21 18:20:46,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 18:20:46,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 18:20:46,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 18:20:46,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:20:46,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 18:20:46,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 18:20:46,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:20:46,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:20:46,423 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:20:46,424 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:20:46,610 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:20:46,615 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:20:46,615 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 18:20:46,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:20:46 BoogieIcfgContainer [2021-12-21 18:20:46,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:20:46,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:20:46,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:20:46,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:20:46,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:20:45" (1/3) ... [2021-12-21 18:20:46,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c9b862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:20:46, skipping insertion in model container [2021-12-21 18:20:46,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:20:46" (2/3) ... [2021-12-21 18:20:46,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c9b862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:20:46, skipping insertion in model container [2021-12-21 18:20:46,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:20:46" (3/3) ... [2021-12-21 18:20:46,628 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2021-12-21 18:20:46,632 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:20:46,632 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-12-21 18:20:46,673 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:20:46,679 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 [2021-12-21 18:20:46,679 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-12-21 18:20:46,692 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) [2021-12-21 18:20:46,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:20:46,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:46,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:20:46,705 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)] === [2021-12-21 18:20:46,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:46,710 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2021-12-21 18:20:46,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:46,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261649333] [2021-12-21 18:20:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:46,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:46,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:46,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261649333] [2021-12-21 18:20:46,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261649333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:20:46,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:20:46,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:20:46,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803182034] [2021-12-21 18:20:46,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:20:46,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:20:46,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:46,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:20:46,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:20:46,973 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) [2021-12-21 18:20:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:47,153 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-12-21 18:20:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:20:47,156 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 [2021-12-21 18:20:47,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:47,164 INFO L225 Difference]: With dead ends: 124 [2021-12-21 18:20:47,164 INFO L226 Difference]: Without dead ends: 118 [2021-12-21 18:20:47,165 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 [2021-12-21 18:20:47,168 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 [2021-12-21 18:20:47,171 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] [2021-12-21 18:20:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-21 18:20:47,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 92. [2021-12-21 18:20:47,200 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) [2021-12-21 18:20:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 123 transitions. [2021-12-21 18:20:47,205 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 123 transitions. Word has length 6 [2021-12-21 18:20:47,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:47,205 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 123 transitions. [2021-12-21 18:20:47,205 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) [2021-12-21 18:20:47,206 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 123 transitions. [2021-12-21 18:20:47,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:20:47,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:47,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:20:47,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 18:20:47,207 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)] === [2021-12-21 18:20:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:47,208 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2021-12-21 18:20:47,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:47,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710158339] [2021-12-21 18:20:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:47,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:47,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:47,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710158339] [2021-12-21 18:20:47,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710158339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:20:47,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:20:47,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:20:47,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523935867] [2021-12-21 18:20:47,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:20:47,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:20:47,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:47,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:20:47,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:20:47,321 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) [2021-12-21 18:20:47,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:47,444 INFO L93 Difference]: Finished difference Result 221 states and 308 transitions. [2021-12-21 18:20:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:20:47,445 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 [2021-12-21 18:20:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:47,447 INFO L225 Difference]: With dead ends: 221 [2021-12-21 18:20:47,447 INFO L226 Difference]: Without dead ends: 221 [2021-12-21 18:20:47,447 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 [2021-12-21 18:20:47,448 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 [2021-12-21 18:20:47,449 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] [2021-12-21 18:20:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-21 18:20:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 168. [2021-12-21 18:20:47,478 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) [2021-12-21 18:20:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 261 transitions. [2021-12-21 18:20:47,487 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 261 transitions. Word has length 6 [2021-12-21 18:20:47,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:47,488 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 261 transitions. [2021-12-21 18:20:47,488 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) [2021-12-21 18:20:47,488 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 261 transitions. [2021-12-21 18:20:47,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 18:20:47,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:47,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:20:47,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 18:20:47,491 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)] === [2021-12-21 18:20:47,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:47,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2021-12-21 18:20:47,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:47,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123159396] [2021-12-21 18:20:47,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:47,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:47,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:47,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123159396] [2021-12-21 18:20:47,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123159396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:20:47,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:20:47,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:20:47,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186307065] [2021-12-21 18:20:47,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:20:47,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:20:47,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:47,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:20:47,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:20:47,650 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) [2021-12-21 18:20:47,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:47,787 INFO L93 Difference]: Finished difference Result 244 states and 348 transitions. [2021-12-21 18:20:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:20:47,788 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 [2021-12-21 18:20:47,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:47,793 INFO L225 Difference]: With dead ends: 244 [2021-12-21 18:20:47,794 INFO L226 Difference]: Without dead ends: 244 [2021-12-21 18:20:47,800 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 [2021-12-21 18:20:47,801 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 [2021-12-21 18:20:47,801 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] [2021-12-21 18:20:47,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-21 18:20:47,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 171. [2021-12-21 18:20:47,813 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) [2021-12-21 18:20:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 264 transitions. [2021-12-21 18:20:47,815 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 264 transitions. Word has length 7 [2021-12-21 18:20:47,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:47,816 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 264 transitions. [2021-12-21 18:20:47,816 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) [2021-12-21 18:20:47,816 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 264 transitions. [2021-12-21 18:20:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 18:20:47,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:47,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:20:47,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 18:20:47,817 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)] === [2021-12-21 18:20:47,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:47,817 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2021-12-21 18:20:47,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:47,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197155817] [2021-12-21 18:20:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:47,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:47,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:47,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197155817] [2021-12-21 18:20:47,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197155817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:20:47,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:20:47,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:20:47,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183462634] [2021-12-21 18:20:47,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:20:47,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:20:47,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:47,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:20:47,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:20:47,963 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) [2021-12-21 18:20:48,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:48,045 INFO L93 Difference]: Finished difference Result 223 states and 309 transitions. [2021-12-21 18:20:48,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:20:48,046 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 [2021-12-21 18:20:48,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:48,047 INFO L225 Difference]: With dead ends: 223 [2021-12-21 18:20:48,047 INFO L226 Difference]: Without dead ends: 223 [2021-12-21 18:20:48,048 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 [2021-12-21 18:20:48,048 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 89 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:20:48,049 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] [2021-12-21 18:20:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-21 18:20:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 171. [2021-12-21 18:20:48,056 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) [2021-12-21 18:20:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 262 transitions. [2021-12-21 18:20:48,057 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 262 transitions. Word has length 8 [2021-12-21 18:20:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:48,058 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 262 transitions. [2021-12-21 18:20:48,058 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) [2021-12-21 18:20:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 262 transitions. [2021-12-21 18:20:48,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 18:20:48,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:48,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:20:48,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 18:20:48,059 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)] === [2021-12-21 18:20:48,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:48,060 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2021-12-21 18:20:48,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:48,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075057934] [2021-12-21 18:20:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:48,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:48,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:48,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075057934] [2021-12-21 18:20:48,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075057934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:20:48,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:20:48,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:20:48,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887780871] [2021-12-21 18:20:48,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:20:48,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:20:48,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:48,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:20:48,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:20:48,093 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) [2021-12-21 18:20:48,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:48,161 INFO L93 Difference]: Finished difference Result 250 states and 344 transitions. [2021-12-21 18:20:48,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:20:48,162 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 [2021-12-21 18:20:48,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:48,163 INFO L225 Difference]: With dead ends: 250 [2021-12-21 18:20:48,163 INFO L226 Difference]: Without dead ends: 250 [2021-12-21 18:20:48,164 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 [2021-12-21 18:20:48,165 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 [2021-12-21 18:20:48,165 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] [2021-12-21 18:20:48,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-21 18:20:48,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 207. [2021-12-21 18:20:48,172 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) [2021-12-21 18:20:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 312 transitions. [2021-12-21 18:20:48,173 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 312 transitions. Word has length 9 [2021-12-21 18:20:48,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:48,174 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 312 transitions. [2021-12-21 18:20:48,174 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) [2021-12-21 18:20:48,174 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 312 transitions. [2021-12-21 18:20:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 18:20:48,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:48,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:20:48,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 18:20:48,175 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)] === [2021-12-21 18:20:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:48,175 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2021-12-21 18:20:48,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:48,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505871750] [2021-12-21 18:20:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:48,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:48,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:48,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505871750] [2021-12-21 18:20:48,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505871750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:20:48,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:20:48,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:20:48,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938645443] [2021-12-21 18:20:48,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:20:48,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:20:48,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:48,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:20:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:20:48,214 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) [2021-12-21 18:20:48,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:48,280 INFO L93 Difference]: Finished difference Result 245 states and 327 transitions. [2021-12-21 18:20:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:20:48,281 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 [2021-12-21 18:20:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:48,282 INFO L225 Difference]: With dead ends: 245 [2021-12-21 18:20:48,282 INFO L226 Difference]: Without dead ends: 245 [2021-12-21 18:20:48,282 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 [2021-12-21 18:20:48,283 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:20:48,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 194 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:20:48,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-21 18:20:48,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 217. [2021-12-21 18:20:48,288 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) [2021-12-21 18:20:48,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 325 transitions. [2021-12-21 18:20:48,290 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 325 transitions. Word has length 10 [2021-12-21 18:20:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:48,290 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 325 transitions. [2021-12-21 18:20:48,290 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) [2021-12-21 18:20:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 325 transitions. [2021-12-21 18:20:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 18:20:48,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:48,291 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:20:48,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 18:20:48,291 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)] === [2021-12-21 18:20:48,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:48,292 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2021-12-21 18:20:48,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:48,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950178478] [2021-12-21 18:20:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:48,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:48,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:48,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950178478] [2021-12-21 18:20:48,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950178478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:20:48,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605949557] [2021-12-21 18:20:48,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:48,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:20:48,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:20:48,385 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) [2021-12-21 18:20:48,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 18:20:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:48,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 18:20:48,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:20:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:48,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:20:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:48,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605949557] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:20:48,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:20:48,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2021-12-21 18:20:48,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789054407] [2021-12-21 18:20:48,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:20:48,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 18:20:48,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:48,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 18:20:48,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:20:48,801 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) [2021-12-21 18:20:49,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:49,004 INFO L93 Difference]: Finished difference Result 302 states and 415 transitions. [2021-12-21 18:20:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:20:49,004 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 [2021-12-21 18:20:49,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:49,006 INFO L225 Difference]: With dead ends: 302 [2021-12-21 18:20:49,006 INFO L226 Difference]: Without dead ends: 302 [2021-12-21 18:20:49,006 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 [2021-12-21 18:20:49,007 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 [2021-12-21 18:20:49,007 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] [2021-12-21 18:20:49,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-21 18:20:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 229. [2021-12-21 18:20:49,013 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) [2021-12-21 18:20:49,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 335 transitions. [2021-12-21 18:20:49,014 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 335 transitions. Word has length 14 [2021-12-21 18:20:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:49,015 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 335 transitions. [2021-12-21 18:20:49,015 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) [2021-12-21 18:20:49,015 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 335 transitions. [2021-12-21 18:20:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 18:20:49,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:49,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:20:49,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 18:20:49,223 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 [2021-12-21 18:20:49,223 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)] === [2021-12-21 18:20:49,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:49,224 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2021-12-21 18:20:49,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:49,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662753665] [2021-12-21 18:20:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:49,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:49,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:49,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662753665] [2021-12-21 18:20:49,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662753665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:20:49,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304295524] [2021-12-21 18:20:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:49,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:20:49,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:20:49,307 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) [2021-12-21 18:20:49,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 18:20:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:49,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 18:20:49,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:20:49,456 INFO L387 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 [2021-12-21 18:20:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:49,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:20:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:49,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304295524] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:20:49,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:20:49,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-21 18:20:49,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669050863] [2021-12-21 18:20:49,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:20:49,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 18:20:49,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:49,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 18:20:49,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:20:49,518 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) [2021-12-21 18:20:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:49,767 INFO L93 Difference]: Finished difference Result 335 states and 463 transitions. [2021-12-21 18:20:49,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:20:49,768 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 [2021-12-21 18:20:49,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:49,769 INFO L225 Difference]: With dead ends: 335 [2021-12-21 18:20:49,769 INFO L226 Difference]: Without dead ends: 335 [2021-12-21 18:20:49,770 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 [2021-12-21 18:20:49,770 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 221 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:20:49,770 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] [2021-12-21 18:20:49,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-12-21 18:20:49,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 239. [2021-12-21 18:20:49,776 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) [2021-12-21 18:20:49,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 349 transitions. [2021-12-21 18:20:49,777 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 349 transitions. Word has length 15 [2021-12-21 18:20:49,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:49,777 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 349 transitions. [2021-12-21 18:20:49,778 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) [2021-12-21 18:20:49,778 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 349 transitions. [2021-12-21 18:20:49,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 18:20:49,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:49,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:20:49,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 18:20:49,996 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 [2021-12-21 18:20:49,996 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)] === [2021-12-21 18:20:49,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:49,997 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2021-12-21 18:20:49,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:49,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325908024] [2021-12-21 18:20:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:49,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:50,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:50,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325908024] [2021-12-21 18:20:50,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325908024] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:20:50,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137371001] [2021-12-21 18:20:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:50,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:20:50,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:20:50,102 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) [2021-12-21 18:20:50,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 18:20:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:50,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 18:20:50,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:20:50,314 INFO L387 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 [2021-12-21 18:20:50,318 INFO L387 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 [2021-12-21 18:20:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:50,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:20:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:50,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137371001] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:20:50,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:20:50,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2021-12-21 18:20:50,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758121682] [2021-12-21 18:20:50,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:20:50,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 18:20:50,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:50,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 18:20:50,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:20:50,428 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) [2021-12-21 18:20:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:50,933 INFO L93 Difference]: Finished difference Result 570 states and 775 transitions. [2021-12-21 18:20:50,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 18:20:50,935 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 [2021-12-21 18:20:50,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:50,937 INFO L225 Difference]: With dead ends: 570 [2021-12-21 18:20:50,937 INFO L226 Difference]: Without dead ends: 570 [2021-12-21 18:20:50,938 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 [2021-12-21 18:20:50,939 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 [2021-12-21 18:20:50,939 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] [2021-12-21 18:20:50,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-12-21 18:20:50,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 347. [2021-12-21 18:20:50,950 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) [2021-12-21 18:20:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 519 transitions. [2021-12-21 18:20:50,952 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 519 transitions. Word has length 16 [2021-12-21 18:20:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:50,953 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 519 transitions. [2021-12-21 18:20:50,953 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) [2021-12-21 18:20:50,953 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 519 transitions. [2021-12-21 18:20:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 18:20:50,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:50,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:20:50,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 18:20:51,163 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 [2021-12-21 18:20:51,163 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)] === [2021-12-21 18:20:51,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:51,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2021-12-21 18:20:51,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:51,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567899234] [2021-12-21 18:20:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:51,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:51,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:51,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567899234] [2021-12-21 18:20:51,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567899234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:20:51,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:20:51,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:20:51,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826022016] [2021-12-21 18:20:51,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:20:51,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:20:51,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:51,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:20:51,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:20:51,193 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) [2021-12-21 18:20:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:51,219 INFO L93 Difference]: Finished difference Result 356 states and 501 transitions. [2021-12-21 18:20:51,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:20:51,219 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 [2021-12-21 18:20:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:51,220 INFO L225 Difference]: With dead ends: 356 [2021-12-21 18:20:51,220 INFO L226 Difference]: Without dead ends: 356 [2021-12-21 18:20:51,220 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 [2021-12-21 18:20:51,221 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 [2021-12-21 18:20:51,221 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] [2021-12-21 18:20:51,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-21 18:20:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 343. [2021-12-21 18:20:51,226 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) [2021-12-21 18:20:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 495 transitions. [2021-12-21 18:20:51,227 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 495 transitions. Word has length 18 [2021-12-21 18:20:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:51,227 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 495 transitions. [2021-12-21 18:20:51,227 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) [2021-12-21 18:20:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 495 transitions. [2021-12-21 18:20:51,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 18:20:51,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:51,228 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] [2021-12-21 18:20:51,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 18:20:51,228 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)] === [2021-12-21 18:20:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:51,229 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2021-12-21 18:20:51,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:51,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991740318] [2021-12-21 18:20:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:51,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:51,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:20:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:51,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:51,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991740318] [2021-12-21 18:20:51,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991740318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:20:51,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:20:51,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:20:51,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573201972] [2021-12-21 18:20:51,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:20:51,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:20:51,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:51,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:20:51,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:20:51,272 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) [2021-12-21 18:20:51,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:51,315 INFO L93 Difference]: Finished difference Result 263 states and 368 transitions. [2021-12-21 18:20:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:20:51,316 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 [2021-12-21 18:20:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:51,317 INFO L225 Difference]: With dead ends: 263 [2021-12-21 18:20:51,317 INFO L226 Difference]: Without dead ends: 263 [2021-12-21 18:20:51,317 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 [2021-12-21 18:20:51,318 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 [2021-12-21 18:20:51,318 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] [2021-12-21 18:20:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-21 18:20:51,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-12-21 18:20:51,321 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) [2021-12-21 18:20:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 368 transitions. [2021-12-21 18:20:51,322 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 368 transitions. Word has length 25 [2021-12-21 18:20:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:51,323 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 368 transitions. [2021-12-21 18:20:51,323 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) [2021-12-21 18:20:51,323 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 368 transitions. [2021-12-21 18:20:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 18:20:51,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:51,324 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] [2021-12-21 18:20:51,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 18:20:51,324 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)] === [2021-12-21 18:20:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:51,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2021-12-21 18:20:51,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:51,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328273830] [2021-12-21 18:20:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:51,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:51,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:20:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:51,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:51,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328273830] [2021-12-21 18:20:51,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328273830] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:20:51,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516959439] [2021-12-21 18:20:51,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:51,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:20:51,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:20:51,462 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) [2021-12-21 18:20:51,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 18:20:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:51,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 18:20:51,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:20:51,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:20:51,772 INFO L387 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 [2021-12-21 18:20:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:51,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:20:51,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516959439] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:20:51,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:20:51,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2021-12-21 18:20:51,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031330449] [2021-12-21 18:20:51,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:20:51,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 18:20:51,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:51,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 18:20:51,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:20:51,939 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) [2021-12-21 18:20:52,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:52,466 INFO L93 Difference]: Finished difference Result 414 states and 529 transitions. [2021-12-21 18:20:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 18:20:52,466 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 [2021-12-21 18:20:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:52,467 INFO L225 Difference]: With dead ends: 414 [2021-12-21 18:20:52,468 INFO L226 Difference]: Without dead ends: 414 [2021-12-21 18:20:52,468 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 [2021-12-21 18:20:52,468 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 [2021-12-21 18:20:52,468 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] [2021-12-21 18:20:52,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-12-21 18:20:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 321. [2021-12-21 18:20:52,473 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) [2021-12-21 18:20:52,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 450 transitions. [2021-12-21 18:20:52,474 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 450 transitions. Word has length 27 [2021-12-21 18:20:52,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:52,474 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 450 transitions. [2021-12-21 18:20:52,474 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) [2021-12-21 18:20:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 450 transitions. [2021-12-21 18:20:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 18:20:52,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:52,475 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] [2021-12-21 18:20:52,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 18:20:52,687 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 [2021-12-21 18:20:52,687 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)] === [2021-12-21 18:20:52,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:52,688 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2021-12-21 18:20:52,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:52,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130782003] [2021-12-21 18:20:52,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:52,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:52,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:20:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:52,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:52,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130782003] [2021-12-21 18:20:52,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130782003] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:20:52,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652899657] [2021-12-21 18:20:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:52,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:20:52,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:20:52,750 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) [2021-12-21 18:20:52,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 18:20:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:52,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 18:20:52,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:20:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:52,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:20:52,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652899657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:20:52,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:20:52,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2021-12-21 18:20:52,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813456227] [2021-12-21 18:20:52,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:20:52,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:20:52,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:52,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:20:52,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:20:52,927 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) [2021-12-21 18:20:53,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:53,003 INFO L93 Difference]: Finished difference Result 416 states and 561 transitions. [2021-12-21 18:20:53,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:20:53,004 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 [2021-12-21 18:20:53,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:53,005 INFO L225 Difference]: With dead ends: 416 [2021-12-21 18:20:53,005 INFO L226 Difference]: Without dead ends: 416 [2021-12-21 18:20:53,005 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 [2021-12-21 18:20:53,005 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 [2021-12-21 18:20:53,005 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] [2021-12-21 18:20:53,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-12-21 18:20:53,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 344. [2021-12-21 18:20:53,010 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) [2021-12-21 18:20:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 481 transitions. [2021-12-21 18:20:53,011 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 481 transitions. Word has length 28 [2021-12-21 18:20:53,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:53,011 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 481 transitions. [2021-12-21 18:20:53,011 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) [2021-12-21 18:20:53,011 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 481 transitions. [2021-12-21 18:20:53,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 18:20:53,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:53,012 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] [2021-12-21 18:20:53,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 18:20:53,227 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 [2021-12-21 18:20:53,227 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)] === [2021-12-21 18:20:53,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash -221078483, now seen corresponding path program 1 times [2021-12-21 18:20:53,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:53,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222311452] [2021-12-21 18:20:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:53,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:53,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:20:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:53,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:53,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222311452] [2021-12-21 18:20:53,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222311452] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:20:53,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833355768] [2021-12-21 18:20:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:53,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:20:53,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:20:53,501 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) [2021-12-21 18:20:53,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 18:20:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:53,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 18:20:53,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:20:53,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:20:53,914 INFO L387 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 [2021-12-21 18:20:53,984 INFO L387 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 [2021-12-21 18:20:53,987 INFO L387 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 [2021-12-21 18:20:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:54,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:20:54,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833355768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:20:54,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:20:54,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2021-12-21 18:20:54,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303209882] [2021-12-21 18:20:54,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:20:54,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 18:20:54,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:54,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 18:20:54,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-12-21 18:20:54,152 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) [2021-12-21 18:20:55,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:55,264 INFO L93 Difference]: Finished difference Result 554 states and 693 transitions. [2021-12-21 18:20:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-21 18:20:55,264 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 [2021-12-21 18:20:55,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:55,266 INFO L225 Difference]: With dead ends: 554 [2021-12-21 18:20:55,266 INFO L226 Difference]: Without dead ends: 554 [2021-12-21 18:20:55,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=462, Invalid=1794, Unknown=0, NotChecked=0, Total=2256 [2021-12-21 18:20:55,267 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 [2021-12-21 18:20:55,267 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] [2021-12-21 18:20:55,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-12-21 18:20:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 401. [2021-12-21 18:20:55,273 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) [2021-12-21 18:20:55,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 571 transitions. [2021-12-21 18:20:55,275 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 571 transitions. Word has length 29 [2021-12-21 18:20:55,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:55,275 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 571 transitions. [2021-12-21 18:20:55,275 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) [2021-12-21 18:20:55,276 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 571 transitions. [2021-12-21 18:20:55,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 18:20:55,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:55,276 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:20:55,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 18:20:55,495 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 [2021-12-21 18:20:55,496 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)] === [2021-12-21 18:20:55,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:55,496 INFO L85 PathProgramCache]: Analyzing trace with hash -253201523, now seen corresponding path program 1 times [2021-12-21 18:20:55,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:55,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883843033] [2021-12-21 18:20:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:55,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:55,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:20:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 18:20:55,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:55,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883843033] [2021-12-21 18:20:55,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883843033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:20:55,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348944399] [2021-12-21 18:20:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:55,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:20:55,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:20:55,552 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) [2021-12-21 18:20:55,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 18:20:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:55,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 18:20:55,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:20:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 18:20:55,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:20:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 18:20:55,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348944399] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:20:55,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:20:55,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-12-21 18:20:55,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227669224] [2021-12-21 18:20:55,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:20:55,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:20:55,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:55,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:20:55,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:20:55,783 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) [2021-12-21 18:20:56,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:56,002 INFO L93 Difference]: Finished difference Result 558 states and 726 transitions. [2021-12-21 18:20:56,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:20:56,002 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 [2021-12-21 18:20:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:56,004 INFO L225 Difference]: With dead ends: 558 [2021-12-21 18:20:56,004 INFO L226 Difference]: Without dead ends: 558 [2021-12-21 18:20:56,004 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 [2021-12-21 18:20:56,004 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 [2021-12-21 18:20:56,004 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] [2021-12-21 18:20:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-12-21 18:20:56,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 478. [2021-12-21 18:20:56,010 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) [2021-12-21 18:20:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 659 transitions. [2021-12-21 18:20:56,011 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 659 transitions. Word has length 30 [2021-12-21 18:20:56,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:56,011 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 659 transitions. [2021-12-21 18:20:56,011 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) [2021-12-21 18:20:56,011 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 659 transitions. [2021-12-21 18:20:56,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 18:20:56,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:56,012 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:20:56,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 18:20:56,227 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 [2021-12-21 18:20:56,227 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)] === [2021-12-21 18:20:56,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:56,228 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2021-12-21 18:20:56,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:56,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587440500] [2021-12-21 18:20:56,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:56,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:56,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:20:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 18:20:56,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:56,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587440500] [2021-12-21 18:20:56,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587440500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:20:56,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156606922] [2021-12-21 18:20:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:56,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:20:56,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:20:56,285 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) [2021-12-21 18:20:56,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 18:20:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:56,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 18:20:56,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:20:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 18:20:56,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:20:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 18:20:56,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156606922] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:20:56,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:20:56,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2021-12-21 18:20:56,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335388919] [2021-12-21 18:20:56,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:20:56,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 18:20:56,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:56,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 18:20:56,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-21 18:20:56,547 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) [2021-12-21 18:20:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:56,859 INFO L93 Difference]: Finished difference Result 533 states and 692 transitions. [2021-12-21 18:20:56,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:20:56,859 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 [2021-12-21 18:20:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:56,860 INFO L225 Difference]: With dead ends: 533 [2021-12-21 18:20:56,860 INFO L226 Difference]: Without dead ends: 533 [2021-12-21 18:20:56,861 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 [2021-12-21 18:20:56,861 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 [2021-12-21 18:20:56,861 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] [2021-12-21 18:20:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-12-21 18:20:56,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 484. [2021-12-21 18:20:56,877 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) [2021-12-21 18:20:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 659 transitions. [2021-12-21 18:20:56,879 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 659 transitions. Word has length 31 [2021-12-21 18:20:56,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:56,879 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 659 transitions. [2021-12-21 18:20:56,879 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) [2021-12-21 18:20:56,879 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 659 transitions. [2021-12-21 18:20:56,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 18:20:56,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:56,880 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] [2021-12-21 18:20:56,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 18:20:57,080 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 [2021-12-21 18:20:57,081 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)] === [2021-12-21 18:20:57,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:57,081 INFO L85 PathProgramCache]: Analyzing trace with hash -117381739, now seen corresponding path program 1 times [2021-12-21 18:20:57,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:57,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761597116] [2021-12-21 18:20:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:57,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:57,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:20:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:57,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:57,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761597116] [2021-12-21 18:20:57,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761597116] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:20:57,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903159711] [2021-12-21 18:20:57,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:57,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:20:57,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:20:57,268 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) [2021-12-21 18:20:57,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 18:20:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:57,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 18:20:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:20:57,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:20:57,612 INFO L387 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 [2021-12-21 18:20:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:57,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:20:57,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903159711] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:20:57,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:20:57,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-12-21 18:20:57,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858560536] [2021-12-21 18:20:57,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:20:57,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 18:20:57,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:57,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 18:20:57,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-21 18:20:57,899 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) [2021-12-21 18:20:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:58,604 INFO L93 Difference]: Finished difference Result 555 states and 698 transitions. [2021-12-21 18:20:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 18:20:58,604 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 [2021-12-21 18:20:58,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:58,606 INFO L225 Difference]: With dead ends: 555 [2021-12-21 18:20:58,606 INFO L226 Difference]: Without dead ends: 555 [2021-12-21 18:20:58,607 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 [2021-12-21 18:20:58,608 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 [2021-12-21 18:20:58,608 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] [2021-12-21 18:20:58,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-12-21 18:20:58,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 484. [2021-12-21 18:20:58,623 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) [2021-12-21 18:20:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 646 transitions. [2021-12-21 18:20:58,624 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 646 transitions. Word has length 35 [2021-12-21 18:20:58,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:58,625 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 646 transitions. [2021-12-21 18:20:58,625 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) [2021-12-21 18:20:58,626 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 646 transitions. [2021-12-21 18:20:58,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-21 18:20:58,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:58,627 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] [2021-12-21 18:20:58,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 18:20:58,839 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 [2021-12-21 18:20:58,839 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)] === [2021-12-21 18:20:58,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:58,840 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2021-12-21 18:20:58,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:58,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787435741] [2021-12-21 18:20:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:58,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:58,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:20:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:58,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:58,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787435741] [2021-12-21 18:20:58,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787435741] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:20:58,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714831975] [2021-12-21 18:20:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:58,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:20:58,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:20:58,924 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) [2021-12-21 18:20:58,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 18:20:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:58,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 18:20:58,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:20:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:59,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:20:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:59,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714831975] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:20:59,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:20:59,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2021-12-21 18:20:59,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384632159] [2021-12-21 18:20:59,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:20:59,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:20:59,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:59,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:20:59,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:20:59,131 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) [2021-12-21 18:20:59,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:59,206 INFO L93 Difference]: Finished difference Result 513 states and 669 transitions. [2021-12-21 18:20:59,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:20:59,207 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 [2021-12-21 18:20:59,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:59,208 INFO L225 Difference]: With dead ends: 513 [2021-12-21 18:20:59,208 INFO L226 Difference]: Without dead ends: 513 [2021-12-21 18:20:59,208 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 [2021-12-21 18:20:59,208 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:20:59,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 70 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:20:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-12-21 18:20:59,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 482. [2021-12-21 18:20:59,215 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) [2021-12-21 18:20:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 638 transitions. [2021-12-21 18:20:59,216 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 638 transitions. Word has length 40 [2021-12-21 18:20:59,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:59,216 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 638 transitions. [2021-12-21 18:20:59,216 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) [2021-12-21 18:20:59,216 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 638 transitions. [2021-12-21 18:20:59,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 18:20:59,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:59,216 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] [2021-12-21 18:20:59,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 18:20:59,434 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 [2021-12-21 18:20:59,434 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)] === [2021-12-21 18:20:59,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:59,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2021-12-21 18:20:59,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:59,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373179496] [2021-12-21 18:20:59,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:59,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:59,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:20:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:59,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:59,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373179496] [2021-12-21 18:20:59,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373179496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:20:59,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414142678] [2021-12-21 18:20:59,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:59,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:20:59,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:20:59,476 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) [2021-12-21 18:20:59,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 18:20:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:59,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 18:20:59,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:20:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:59,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:20:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:20:59,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414142678] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:20:59,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:20:59,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2021-12-21 18:20:59,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555548251] [2021-12-21 18:20:59,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:20:59,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:20:59,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:59,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:20:59,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:20:59,688 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) [2021-12-21 18:20:59,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:59,762 INFO L93 Difference]: Finished difference Result 511 states and 661 transitions. [2021-12-21 18:20:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:20:59,772 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 [2021-12-21 18:20:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:59,773 INFO L225 Difference]: With dead ends: 511 [2021-12-21 18:20:59,773 INFO L226 Difference]: Without dead ends: 511 [2021-12-21 18:20:59,774 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 [2021-12-21 18:20:59,774 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 [2021-12-21 18:20:59,774 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] [2021-12-21 18:20:59,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-12-21 18:20:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 480. [2021-12-21 18:20:59,781 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) [2021-12-21 18:20:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 630 transitions. [2021-12-21 18:20:59,782 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 630 transitions. Word has length 41 [2021-12-21 18:20:59,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:59,782 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 630 transitions. [2021-12-21 18:20:59,782 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) [2021-12-21 18:20:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 630 transitions. [2021-12-21 18:20:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 18:20:59,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:59,783 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] [2021-12-21 18:20:59,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:00,001 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 [2021-12-21 18:21:00,001 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)] === [2021-12-21 18:21:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:00,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2021-12-21 18:21:00,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:00,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843746656] [2021-12-21 18:21:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:00,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:00,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:00,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:00,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843746656] [2021-12-21 18:21:00,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843746656] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:00,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710758242] [2021-12-21 18:21:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:00,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:00,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:00,061 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) [2021-12-21 18:21:00,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 18:21:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:00,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 18:21:00,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:00,133 INFO L387 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 [2021-12-21 18:21:00,179 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:21:00,180 INFO L387 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 [2021-12-21 18:21:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:00,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:00,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710758242] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:21:00,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:21:00,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2021-12-21 18:21:00,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133614225] [2021-12-21 18:21:00,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:00,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:21:00,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:00,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:21:00,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:21:00,360 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) [2021-12-21 18:21:00,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:00,445 INFO L93 Difference]: Finished difference Result 532 states and 675 transitions. [2021-12-21 18:21:00,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:21:00,445 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 [2021-12-21 18:21:00,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:00,446 INFO L225 Difference]: With dead ends: 532 [2021-12-21 18:21:00,446 INFO L226 Difference]: Without dead ends: 532 [2021-12-21 18:21:00,447 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 [2021-12-21 18:21:00,447 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 [2021-12-21 18:21:00,447 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] [2021-12-21 18:21:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-12-21 18:21:00,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 486. [2021-12-21 18:21:00,453 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) [2021-12-21 18:21:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 636 transitions. [2021-12-21 18:21:00,454 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 636 transitions. Word has length 42 [2021-12-21 18:21:00,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:00,454 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 636 transitions. [2021-12-21 18:21:00,454 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) [2021-12-21 18:21:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 636 transitions. [2021-12-21 18:21:00,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 18:21:00,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:00,455 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] [2021-12-21 18:21:00,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-21 18:21:00,665 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 [2021-12-21 18:21:00,666 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)] === [2021-12-21 18:21:00,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:00,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1200736699, now seen corresponding path program 1 times [2021-12-21 18:21:00,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:00,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926747526] [2021-12-21 18:21:00,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:00,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:00,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:00,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:00,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926747526] [2021-12-21 18:21:00,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926747526] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:00,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769083758] [2021-12-21 18:21:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:00,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:00,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:00,702 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) [2021-12-21 18:21:00,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 18:21:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:00,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:21:00,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:21:00,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:21:00,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769083758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:21:00,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:21:00,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-21 18:21:00,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098071445] [2021-12-21 18:21:00,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:21:00,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:21:00,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:00,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:21:00,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:21:00,805 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) [2021-12-21 18:21:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:00,822 INFO L93 Difference]: Finished difference Result 580 states and 722 transitions. [2021-12-21 18:21:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:21:00,823 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 [2021-12-21 18:21:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:00,824 INFO L225 Difference]: With dead ends: 580 [2021-12-21 18:21:00,824 INFO L226 Difference]: Without dead ends: 580 [2021-12-21 18:21:00,825 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 [2021-12-21 18:21:00,825 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 [2021-12-21 18:21:00,825 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] [2021-12-21 18:21:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-12-21 18:21:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 476. [2021-12-21 18:21:00,832 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) [2021-12-21 18:21:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 611 transitions. [2021-12-21 18:21:00,834 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 611 transitions. Word has length 45 [2021-12-21 18:21:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:00,834 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 611 transitions. [2021-12-21 18:21:00,834 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) [2021-12-21 18:21:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 611 transitions. [2021-12-21 18:21:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 18:21:00,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:00,835 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] [2021-12-21 18:21:00,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:01,051 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 [2021-12-21 18:21:01,052 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)] === [2021-12-21 18:21:01,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1458472979, now seen corresponding path program 1 times [2021-12-21 18:21:01,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:01,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510099162] [2021-12-21 18:21:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:01,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:01,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:01,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 18:21:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 18:21:01,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:01,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510099162] [2021-12-21 18:21:01,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510099162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:01,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743038355] [2021-12-21 18:21:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:01,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:01,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:01,174 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) [2021-12-21 18:21:01,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 18:21:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:01,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 18:21:01,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:01,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:21:01,625 INFO L387 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 [2021-12-21 18:21:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 18:21:01,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:01,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743038355] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:01,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:21:01,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2021-12-21 18:21:01,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581385809] [2021-12-21 18:21:01,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:01,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 18:21:01,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:01,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 18:21:01,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:21:01,763 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) [2021-12-21 18:21:02,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:02,163 INFO L93 Difference]: Finished difference Result 546 states and 665 transitions. [2021-12-21 18:21:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 18:21:02,166 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 [2021-12-21 18:21:02,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:02,167 INFO L225 Difference]: With dead ends: 546 [2021-12-21 18:21:02,168 INFO L226 Difference]: Without dead ends: 546 [2021-12-21 18:21:02,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-12-21 18:21:02,168 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 418 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-21 18:21:02,177 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] [2021-12-21 18:21:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-12-21 18:21:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 483. [2021-12-21 18:21:02,185 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) [2021-12-21 18:21:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 615 transitions. [2021-12-21 18:21:02,186 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 615 transitions. Word has length 48 [2021-12-21 18:21:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:02,186 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 615 transitions. [2021-12-21 18:21:02,186 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) [2021-12-21 18:21:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 615 transitions. [2021-12-21 18:21:02,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 18:21:02,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:02,187 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] [2021-12-21 18:21:02,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:02,399 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 [2021-12-21 18:21:02,399 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)] === [2021-12-21 18:21:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:02,400 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2021-12-21 18:21:02,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:02,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474446291] [2021-12-21 18:21:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:02,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:02,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 18:21:02,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:02,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474446291] [2021-12-21 18:21:02,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474446291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:02,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374221164] [2021-12-21 18:21:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:02,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:02,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:02,439 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) [2021-12-21 18:21:02,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 18:21:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:02,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 18:21:02,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 18:21:02,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:21:02,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374221164] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:21:02,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:21:02,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-21 18:21:02,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096905551] [2021-12-21 18:21:02,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:21:02,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:21:02,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:02,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:21:02,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:21:02,548 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) [2021-12-21 18:21:02,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:02,557 INFO L93 Difference]: Finished difference Result 509 states and 636 transitions. [2021-12-21 18:21:02,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:21:02,557 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 [2021-12-21 18:21:02,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:02,558 INFO L225 Difference]: With dead ends: 509 [2021-12-21 18:21:02,559 INFO L226 Difference]: Without dead ends: 509 [2021-12-21 18:21:02,559 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 [2021-12-21 18:21:02,559 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 [2021-12-21 18:21:02,559 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] [2021-12-21 18:21:02,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-12-21 18:21:02,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 482. [2021-12-21 18:21:02,565 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) [2021-12-21 18:21:02,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 609 transitions. [2021-12-21 18:21:02,566 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 609 transitions. Word has length 47 [2021-12-21 18:21:02,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:02,567 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 609 transitions. [2021-12-21 18:21:02,567 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) [2021-12-21 18:21:02,567 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 609 transitions. [2021-12-21 18:21:02,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 18:21:02,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:02,567 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] [2021-12-21 18:21:02,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:02,783 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 [2021-12-21 18:21:02,783 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)] === [2021-12-21 18:21:02,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:02,784 INFO L85 PathProgramCache]: Analyzing trace with hash 296907458, now seen corresponding path program 1 times [2021-12-21 18:21:02,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:02,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48295719] [2021-12-21 18:21:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:02,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:02,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:02,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 18:21:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:21:02,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:02,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48295719] [2021-12-21 18:21:02,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48295719] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:02,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118724878] [2021-12-21 18:21:02,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:02,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:02,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:02,863 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) [2021-12-21 18:21:02,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 18:21:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:02,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 18:21:02,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:02,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:03,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118724878] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:21:03,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:21:03,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2021-12-21 18:21:03,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745395220] [2021-12-21 18:21:03,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:03,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 18:21:03,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:03,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 18:21:03,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:21:03,121 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) [2021-12-21 18:21:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:03,309 INFO L93 Difference]: Finished difference Result 404 states and 482 transitions. [2021-12-21 18:21:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:21:03,309 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 [2021-12-21 18:21:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:03,311 INFO L225 Difference]: With dead ends: 404 [2021-12-21 18:21:03,311 INFO L226 Difference]: Without dead ends: 404 [2021-12-21 18:21:03,311 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 [2021-12-21 18:21:03,311 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 [2021-12-21 18:21:03,312 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] [2021-12-21 18:21:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-12-21 18:21:03,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 367. [2021-12-21 18:21:03,316 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) [2021-12-21 18:21:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 448 transitions. [2021-12-21 18:21:03,316 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 448 transitions. Word has length 48 [2021-12-21 18:21:03,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:03,317 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 448 transitions. [2021-12-21 18:21:03,317 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) [2021-12-21 18:21:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 448 transitions. [2021-12-21 18:21:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 18:21:03,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:03,318 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] [2021-12-21 18:21:03,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-21 18:21:03,535 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 [2021-12-21 18:21:03,535 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)] === [2021-12-21 18:21:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:03,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1661228621, now seen corresponding path program 1 times [2021-12-21 18:21:03,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:03,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248857129] [2021-12-21 18:21:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:03,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:03,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 18:21:03,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:03,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248857129] [2021-12-21 18:21:03,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248857129] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:03,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714723627] [2021-12-21 18:21:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:03,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:03,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:03,565 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) [2021-12-21 18:21:03,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-21 18:21:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:03,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 18:21:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 18:21:03,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:21:03,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714723627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:21:03,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:21:03,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2021-12-21 18:21:03,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310978053] [2021-12-21 18:21:03,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:21:03,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:21:03,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:03,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:21:03,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:21:03,707 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) [2021-12-21 18:21:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:03,724 INFO L93 Difference]: Finished difference Result 385 states and 462 transitions. [2021-12-21 18:21:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:21:03,725 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 [2021-12-21 18:21:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:03,726 INFO L225 Difference]: With dead ends: 385 [2021-12-21 18:21:03,726 INFO L226 Difference]: Without dead ends: 385 [2021-12-21 18:21:03,726 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 [2021-12-21 18:21:03,727 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 [2021-12-21 18:21:03,727 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] [2021-12-21 18:21:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-12-21 18:21:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 366. [2021-12-21 18:21:03,731 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) [2021-12-21 18:21:03,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 443 transitions. [2021-12-21 18:21:03,732 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 443 transitions. Word has length 48 [2021-12-21 18:21:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:03,732 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 443 transitions. [2021-12-21 18:21:03,732 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) [2021-12-21 18:21:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 443 transitions. [2021-12-21 18:21:03,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 18:21:03,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:03,733 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] [2021-12-21 18:21:03,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:03,956 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 [2021-12-21 18:21:03,957 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)] === [2021-12-21 18:21:03,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:03,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1433195828, now seen corresponding path program 1 times [2021-12-21 18:21:03,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:03,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632563892] [2021-12-21 18:21:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:03,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:04,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:04,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 18:21:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 18:21:04,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:04,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632563892] [2021-12-21 18:21:04,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632563892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:04,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281101497] [2021-12-21 18:21:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:04,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:04,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:04,226 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) [2021-12-21 18:21:04,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-21 18:21:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:04,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-21 18:21:04,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:04,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:21:04,806 INFO L387 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 [2021-12-21 18:21:04,878 INFO L387 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 [2021-12-21 18:21:04,881 INFO L387 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 [2021-12-21 18:21:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 18:21:04,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:05,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281101497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:05,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:21:05,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2021-12-21 18:21:05,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979271436] [2021-12-21 18:21:05,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:05,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 18:21:05,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:05,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 18:21:05,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-12-21 18:21:05,005 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), 16 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) [2021-12-21 18:21:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:05,962 INFO L93 Difference]: Finished difference Result 468 states and 530 transitions. [2021-12-21 18:21:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-21 18:21:05,962 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 16 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 [2021-12-21 18:21:05,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:05,964 INFO L225 Difference]: With dead ends: 468 [2021-12-21 18:21:05,964 INFO L226 Difference]: Without dead ends: 468 [2021-12-21 18:21:05,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=430, Invalid=1462, Unknown=0, NotChecked=0, Total=1892 [2021-12-21 18:21:05,965 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 514 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:05,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 388 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 547 Invalid, 0 Unknown, 136 Unchecked, 0.3s Time] [2021-12-21 18:21:05,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-12-21 18:21:05,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 366. [2021-12-21 18:21:05,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 334 states have (on average 1.251497005988024) internal successors, (418), 349 states have internal predecessors, (418), 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) [2021-12-21 18:21:05,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 440 transitions. [2021-12-21 18:21:05,973 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 440 transitions. Word has length 50 [2021-12-21 18:21:05,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:05,973 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 440 transitions. [2021-12-21 18:21:05,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 16 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) [2021-12-21 18:21:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 440 transitions. [2021-12-21 18:21:05,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-21 18:21:05,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:05,974 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] [2021-12-21 18:21:05,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:06,187 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 [2021-12-21 18:21:06,187 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)] === [2021-12-21 18:21:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:06,188 INFO L85 PathProgramCache]: Analyzing trace with hash -41520225, now seen corresponding path program 1 times [2021-12-21 18:21:06,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:06,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018064074] [2021-12-21 18:21:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:06,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:06,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 18:21:06,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:06,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018064074] [2021-12-21 18:21:06,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018064074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:06,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012232550] [2021-12-21 18:21:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:06,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:06,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:06,218 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) [2021-12-21 18:21:06,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-21 18:21:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:06,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 18:21:06,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 18:21:06,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:21:06,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012232550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:21:06,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:21:06,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-21 18:21:06,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965034592] [2021-12-21 18:21:06,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:21:06,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:21:06,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:06,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:21:06,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:21:06,334 INFO L87 Difference]: Start difference. First operand 366 states and 440 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) [2021-12-21 18:21:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:06,338 INFO L93 Difference]: Finished difference Result 384 states and 454 transitions. [2021-12-21 18:21:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:21:06,339 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 [2021-12-21 18:21:06,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:06,340 INFO L225 Difference]: With dead ends: 384 [2021-12-21 18:21:06,340 INFO L226 Difference]: Without dead ends: 384 [2021-12-21 18:21:06,340 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 [2021-12-21 18:21:06,340 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 [2021-12-21 18:21:06,341 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] [2021-12-21 18:21:06,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-12-21 18:21:06,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 365. [2021-12-21 18:21:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.2365269461077844) internal successors, (413), 348 states have internal predecessors, (413), 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) [2021-12-21 18:21:06,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 435 transitions. [2021-12-21 18:21:06,360 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 435 transitions. Word has length 49 [2021-12-21 18:21:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:06,360 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 435 transitions. [2021-12-21 18:21:06,360 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) [2021-12-21 18:21:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 435 transitions. [2021-12-21 18:21:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 18:21:06,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:06,361 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:21:06,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:06,561 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 [2021-12-21 18:21:06,561 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)] === [2021-12-21 18:21:06,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:06,562 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2021-12-21 18:21:06,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:06,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253247876] [2021-12-21 18:21:06,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:06,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:06,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:06,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 18:21:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 18:21:06,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253247876] [2021-12-21 18:21:06,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253247876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29732889] [2021-12-21 18:21:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:06,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:06,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:06,630 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) [2021-12-21 18:21:06,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-21 18:21:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:06,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 18:21:06,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 18:21:06,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 18:21:06,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29732889] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:21:06,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:21:06,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-12-21 18:21:06,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16918112] [2021-12-21 18:21:06,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:06,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:21:06,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:06,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:21:06,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:21:06,975 INFO L87 Difference]: Start difference. First operand 365 states and 435 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) [2021-12-21 18:21:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:07,153 INFO L93 Difference]: Finished difference Result 401 states and 461 transitions. [2021-12-21 18:21:07,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:21:07,153 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 [2021-12-21 18:21:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:07,154 INFO L225 Difference]: With dead ends: 401 [2021-12-21 18:21:07,154 INFO L226 Difference]: Without dead ends: 401 [2021-12-21 18:21:07,154 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 [2021-12-21 18:21:07,154 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 293 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:07,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 176 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:21:07,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-12-21 18:21:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 365. [2021-12-21 18:21:07,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.2275449101796407) internal successors, (410), 348 states have internal predecessors, (410), 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) [2021-12-21 18:21:07,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 432 transitions. [2021-12-21 18:21:07,174 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 432 transitions. Word has length 51 [2021-12-21 18:21:07,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:07,174 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 432 transitions. [2021-12-21 18:21:07,174 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) [2021-12-21 18:21:07,175 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 432 transitions. [2021-12-21 18:21:07,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 18:21:07,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:07,175 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] [2021-12-21 18:21:07,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:07,392 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 [2021-12-21 18:21:07,393 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)] === [2021-12-21 18:21:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:07,393 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2021-12-21 18:21:07,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:07,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759772563] [2021-12-21 18:21:07,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:07,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:07,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:07,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 18:21:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:21:07,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:07,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759772563] [2021-12-21 18:21:07,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759772563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:07,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714029289] [2021-12-21 18:21:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:07,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:07,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:07,493 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) [2021-12-21 18:21:07,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-21 18:21:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:07,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 18:21:07,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:07,672 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:21:07,672 INFO L387 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 [2021-12-21 18:21:07,772 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:21:07,772 INFO L387 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 [2021-12-21 18:21:07,806 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:21:07,806 INFO L387 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 [2021-12-21 18:21:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:07,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:07,902 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:21:07,902 INFO L387 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 [2021-12-21 18:21:08,088 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:21:08,090 INFO L387 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 [2021-12-21 18:21:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:08,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714029289] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:21:08,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:21:08,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 25 [2021-12-21 18:21:08,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065482302] [2021-12-21 18:21:08,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:08,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 18:21:08,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:08,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 18:21:08,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-12-21 18:21:08,273 INFO L87 Difference]: Start difference. First operand 365 states and 432 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) [2021-12-21 18:21:08,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:08,475 INFO L93 Difference]: Finished difference Result 393 states and 458 transitions. [2021-12-21 18:21:08,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:21:08,476 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 [2021-12-21 18:21:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:08,477 INFO L225 Difference]: With dead ends: 393 [2021-12-21 18:21:08,477 INFO L226 Difference]: Without dead ends: 393 [2021-12-21 18:21:08,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-12-21 18:21:08,478 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 342 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:08,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 127 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 235 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2021-12-21 18:21:08,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-21 18:21:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 365. [2021-12-21 18:21:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.2245508982035929) internal successors, (409), 348 states have internal predecessors, (409), 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) [2021-12-21 18:21:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 431 transitions. [2021-12-21 18:21:08,482 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 431 transitions. Word has length 51 [2021-12-21 18:21:08,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:08,482 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 431 transitions. [2021-12-21 18:21:08,482 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) [2021-12-21 18:21:08,482 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 431 transitions. [2021-12-21 18:21:08,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 18:21:08,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:08,482 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] [2021-12-21 18:21:08,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:08,696 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 [2021-12-21 18:21:08,696 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)] === [2021-12-21 18:21:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash -563187968, now seen corresponding path program 1 times [2021-12-21 18:21:08,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:08,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250618133] [2021-12-21 18:21:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:08,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:08,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:08,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 18:21:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:21:08,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:08,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250618133] [2021-12-21 18:21:08,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250618133] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:08,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726026306] [2021-12-21 18:21:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:08,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:08,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:08,774 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) [2021-12-21 18:21:08,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-21 18:21:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:08,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 18:21:08,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:08,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:21:08,985 INFO L387 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 [2021-12-21 18:21:08,991 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:21:08,991 INFO L387 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 [2021-12-21 18:21:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:21:09,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:21:09,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726026306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:21:09,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:21:09,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2021-12-21 18:21:09,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893579531] [2021-12-21 18:21:09,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:21:09,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:21:09,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:09,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:21:09,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-12-21 18:21:09,049 INFO L87 Difference]: Start difference. First operand 365 states and 431 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) [2021-12-21 18:21:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:09,162 INFO L93 Difference]: Finished difference Result 442 states and 506 transitions. [2021-12-21 18:21:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:21:09,162 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 [2021-12-21 18:21:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:09,163 INFO L225 Difference]: With dead ends: 442 [2021-12-21 18:21:09,163 INFO L226 Difference]: Without dead ends: 442 [2021-12-21 18:21:09,163 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 [2021-12-21 18:21:09,164 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 308 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:09,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 80 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:21:09,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-12-21 18:21:09,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 365. [2021-12-21 18:21:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.215568862275449) internal successors, (406), 348 states have internal predecessors, (406), 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) [2021-12-21 18:21:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 428 transitions. [2021-12-21 18:21:09,182 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 428 transitions. Word has length 51 [2021-12-21 18:21:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:09,182 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 428 transitions. [2021-12-21 18:21:09,182 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) [2021-12-21 18:21:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 428 transitions. [2021-12-21 18:21:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 18:21:09,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:09,183 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:21:09,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-21 18:21:09,400 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 [2021-12-21 18:21:09,400 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)] === [2021-12-21 18:21:09,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:09,401 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2021-12-21 18:21:09,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:09,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660388857] [2021-12-21 18:21:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:09,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:09,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:09,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 18:21:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 18:21:09,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:09,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660388857] [2021-12-21 18:21:09,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660388857] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:09,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725184827] [2021-12-21 18:21:09,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:09,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:09,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:09,468 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) [2021-12-21 18:21:09,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-21 18:21:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:09,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 18:21:09,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 18:21:09,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 18:21:09,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725184827] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:21:09,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:21:09,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2021-12-21 18:21:09,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307037191] [2021-12-21 18:21:09,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:09,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 18:21:09,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:09,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 18:21:09,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-21 18:21:09,847 INFO L87 Difference]: Start difference. First operand 365 states and 428 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) [2021-12-21 18:21:10,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:10,131 INFO L93 Difference]: Finished difference Result 396 states and 453 transitions. [2021-12-21 18:21:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:21:10,131 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 [2021-12-21 18:21:10,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:10,133 INFO L225 Difference]: With dead ends: 396 [2021-12-21 18:21:10,133 INFO L226 Difference]: Without dead ends: 396 [2021-12-21 18:21:10,133 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 [2021-12-21 18:21:10,135 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 299 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:10,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 312 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:21:10,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-21 18:21:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 364. [2021-12-21 18:21:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 334 states have (on average 1.2005988023952097) internal successors, (401), 347 states have internal predecessors, (401), 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) [2021-12-21 18:21:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 423 transitions. [2021-12-21 18:21:10,148 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 423 transitions. Word has length 52 [2021-12-21 18:21:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:10,148 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 423 transitions. [2021-12-21 18:21:10,148 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) [2021-12-21 18:21:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 423 transitions. [2021-12-21 18:21:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 18:21:10,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:10,148 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] [2021-12-21 18:21:10,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:10,355 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 [2021-12-21 18:21:10,356 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)] === [2021-12-21 18:21:10,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:10,356 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2021-12-21 18:21:10,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:10,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718214394] [2021-12-21 18:21:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:10,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:10,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:10,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 18:21:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:21:10,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:10,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718214394] [2021-12-21 18:21:10,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718214394] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:10,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088886350] [2021-12-21 18:21:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:10,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:10,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:10,738 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) [2021-12-21 18:21:10,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-21 18:21:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:10,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 18:21:10,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:10,992 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:21:10,992 INFO L387 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 [2021-12-21 18:21:11,177 INFO L353 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-21 18:21:11,178 INFO L387 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 [2021-12-21 18:21:11,241 INFO L353 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-21 18:21:11,241 INFO L387 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 [2021-12-21 18:21:11,358 INFO L387 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 [2021-12-21 18:21:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:11,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:11,449 INFO L353 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-21 18:21:11,449 INFO L387 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 [2021-12-21 18:21:11,684 INFO L353 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2021-12-21 18:21:11,685 INFO L387 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 [2021-12-21 18:21:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:11,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088886350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:21:11,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:21:11,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 14] total 44 [2021-12-21 18:21:11,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281563935] [2021-12-21 18:21:11,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:11,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-21 18:21:11,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-21 18:21:11,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2021-12-21 18:21:11,964 INFO L87 Difference]: Start difference. First operand 364 states and 423 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) [2021-12-21 18:21:12,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:12,673 INFO L93 Difference]: Finished difference Result 450 states and 509 transitions. [2021-12-21 18:21:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 18:21:12,674 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 [2021-12-21 18:21:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:12,675 INFO L225 Difference]: With dead ends: 450 [2021-12-21 18:21:12,675 INFO L226 Difference]: Without dead ends: 450 [2021-12-21 18:21:12,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=579, Invalid=2843, Unknown=0, NotChecked=0, Total=3422 [2021-12-21 18:21:12,676 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 541 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:12,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 271 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 779 Invalid, 0 Unknown, 25 Unchecked, 0.4s Time] [2021-12-21 18:21:12,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-12-21 18:21:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 364. [2021-12-21 18:21:12,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 334 states have (on average 1.1976047904191616) internal successors, (400), 347 states have internal predecessors, (400), 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) [2021-12-21 18:21:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 422 transitions. [2021-12-21 18:21:12,680 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 422 transitions. Word has length 52 [2021-12-21 18:21:12,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:12,680 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 422 transitions. [2021-12-21 18:21:12,680 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) [2021-12-21 18:21:12,680 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 422 transitions. [2021-12-21 18:21:12,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 18:21:12,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:12,681 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] [2021-12-21 18:21:12,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-21 18:21:12,892 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 [2021-12-21 18:21:12,892 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)] === [2021-12-21 18:21:12,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:12,892 INFO L85 PathProgramCache]: Analyzing trace with hash 21635793, now seen corresponding path program 1 times [2021-12-21 18:21:12,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:12,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275395643] [2021-12-21 18:21:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:12,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:12,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 18:21:12,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:12,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275395643] [2021-12-21 18:21:12,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275395643] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:12,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429084252] [2021-12-21 18:21:12,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:12,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:12,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:12,928 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) [2021-12-21 18:21:12,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-21 18:21:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:12,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 18:21:12,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 18:21:13,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:21:13,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429084252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:21:13,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:21:13,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-12-21 18:21:13,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61557424] [2021-12-21 18:21:13,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:21:13,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:21:13,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:13,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:21:13,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:21:13,037 INFO L87 Difference]: Start difference. First operand 364 states and 422 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) [2021-12-21 18:21:13,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:13,038 INFO L93 Difference]: Finished difference Result 306 states and 345 transitions. [2021-12-21 18:21:13,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:21:13,039 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 [2021-12-21 18:21:13,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:13,040 INFO L225 Difference]: With dead ends: 306 [2021-12-21 18:21:13,040 INFO L226 Difference]: Without dead ends: 306 [2021-12-21 18:21:13,040 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 [2021-12-21 18:21:13,041 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 [2021-12-21 18:21:13,041 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] [2021-12-21 18:21:13,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-21 18:21:13,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 289. [2021-12-21 18:21:13,045 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) [2021-12-21 18:21:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 328 transitions. [2021-12-21 18:21:13,046 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 328 transitions. Word has length 52 [2021-12-21 18:21:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:13,046 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 328 transitions. [2021-12-21 18:21:13,046 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) [2021-12-21 18:21:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 328 transitions. [2021-12-21 18:21:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 18:21:13,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:13,047 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] [2021-12-21 18:21:13,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:13,261 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 [2021-12-21 18:21:13,261 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-21 18:21:13,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:13,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2021-12-21 18:21:13,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:13,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812331590] [2021-12-21 18:21:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:13,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:13,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:13,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 18:21:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:21:13,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:13,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812331590] [2021-12-21 18:21:13,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812331590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:13,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820779608] [2021-12-21 18:21:13,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:13,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:13,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:13,431 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) [2021-12-21 18:21:13,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-21 18:21:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:13,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 18:21:13,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:13,633 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:21:13,633 INFO L387 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 [2021-12-21 18:21:13,776 INFO L353 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-21 18:21:13,776 INFO L387 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 [2021-12-21 18:21:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:13,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:14,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820779608] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:14,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:21:14,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-12-21 18:21:14,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367262385] [2021-12-21 18:21:14,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:14,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 18:21:14,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:14,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 18:21:14,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-12-21 18:21:14,079 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) [2021-12-21 18:21:14,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:14,514 INFO L93 Difference]: Finished difference Result 307 states and 344 transitions. [2021-12-21 18:21:14,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 18:21:14,514 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 [2021-12-21 18:21:14,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:14,515 INFO L225 Difference]: With dead ends: 307 [2021-12-21 18:21:14,515 INFO L226 Difference]: Without dead ends: 307 [2021-12-21 18:21:14,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 18:21:14,523 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 422 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:14,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 214 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 223 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2021-12-21 18:21:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-12-21 18:21:14,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 288. [2021-12-21 18:21:14,527 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) [2021-12-21 18:21:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 327 transitions. [2021-12-21 18:21:14,527 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 327 transitions. Word has length 54 [2021-12-21 18:21:14,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:14,528 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 327 transitions. [2021-12-21 18:21:14,528 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) [2021-12-21 18:21:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 327 transitions. [2021-12-21 18:21:14,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 18:21:14,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:14,529 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] [2021-12-21 18:21:14,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:14,743 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 [2021-12-21 18:21:14,743 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-21 18:21:14,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:14,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1889386740, now seen corresponding path program 2 times [2021-12-21 18:21:14,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:14,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718322984] [2021-12-21 18:21:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:14,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:14,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:14,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 18:21:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 18:21:14,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:14,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718322984] [2021-12-21 18:21:14,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718322984] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:14,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638711619] [2021-12-21 18:21:14,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:21:14,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:14,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:14,872 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) [2021-12-21 18:21:14,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-21 18:21:14,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:21:14,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:21:14,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 18:21:14,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:15,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:21:15,352 INFO L387 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 [2021-12-21 18:21:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 18:21:15,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:15,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638711619] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:15,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:21:15,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-12-21 18:21:15,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515470420] [2021-12-21 18:21:15,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:15,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 18:21:15,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:15,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 18:21:15,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-12-21 18:21:15,605 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) [2021-12-21 18:21:16,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:16,146 INFO L93 Difference]: Finished difference Result 340 states and 373 transitions. [2021-12-21 18:21:16,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 18:21:16,146 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 [2021-12-21 18:21:16,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:16,147 INFO L225 Difference]: With dead ends: 340 [2021-12-21 18:21:16,147 INFO L226 Difference]: Without dead ends: 340 [2021-12-21 18:21:16,147 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 [2021-12-21 18:21:16,148 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 412 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:16,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 383 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 410 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2021-12-21 18:21:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-12-21 18:21:16,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 288. [2021-12-21 18:21:16,151 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) [2021-12-21 18:21:16,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 324 transitions. [2021-12-21 18:21:16,151 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 324 transitions. Word has length 56 [2021-12-21 18:21:16,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:16,152 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 324 transitions. [2021-12-21 18:21:16,152 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) [2021-12-21 18:21:16,153 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 324 transitions. [2021-12-21 18:21:16,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 18:21:16,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:16,154 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] [2021-12-21 18:21:16,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:16,373 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 [2021-12-21 18:21:16,373 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)] === [2021-12-21 18:21:16,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:16,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1842875129, now seen corresponding path program 1 times [2021-12-21 18:21:16,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:16,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582050275] [2021-12-21 18:21:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:16,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:16,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:16,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 18:21:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:21:16,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:16,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582050275] [2021-12-21 18:21:16,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582050275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:16,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091628112] [2021-12-21 18:21:16,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:16,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:16,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:16,713 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) [2021-12-21 18:21:16,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-21 18:21:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:16,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-21 18:21:16,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:17,000 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:21:17,001 INFO L387 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 [2021-12-21 18:21:17,160 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:21:17,160 INFO L387 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 [2021-12-21 18:21:17,237 INFO L387 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 [2021-12-21 18:21:17,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:21:17,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 18:21:17,434 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:21:17,435 INFO L387 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 [2021-12-21 18:21:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:17,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:17,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 18:21:17,677 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:21:17,677 INFO L387 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 13 treesize of output 12 [2021-12-21 18:21:17,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091628112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:17,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:21:17,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2021-12-21 18:21:17,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374733655] [2021-12-21 18:21:17,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:17,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-21 18:21:17,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:17,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-21 18:21:17,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 18:21:17,740 INFO L87 Difference]: Start difference. First operand 288 states and 324 transitions. Second operand has 31 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:21:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:18,743 INFO L93 Difference]: Finished difference Result 318 states and 351 transitions. [2021-12-21 18:21:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-21 18:21:18,743 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2021-12-21 18:21:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:18,744 INFO L225 Difference]: With dead ends: 318 [2021-12-21 18:21:18,744 INFO L226 Difference]: Without dead ends: 318 [2021-12-21 18:21:18,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=769, Invalid=3137, Unknown=0, NotChecked=0, Total=3906 [2021-12-21 18:21:18,745 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 755 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:18,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 352 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 369 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2021-12-21 18:21:18,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-12-21 18:21:18,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 285. [2021-12-21 18:21:18,748 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) [2021-12-21 18:21:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 320 transitions. [2021-12-21 18:21:18,748 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 320 transitions. Word has length 59 [2021-12-21 18:21:18,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:18,749 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 320 transitions. [2021-12-21 18:21:18,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:21:18,749 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 320 transitions. [2021-12-21 18:21:18,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 18:21:18,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:18,749 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] [2021-12-21 18:21:18,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:18,966 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 [2021-12-21 18:21:18,966 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-21 18:21:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:18,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1294554201, now seen corresponding path program 1 times [2021-12-21 18:21:18,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:18,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040153255] [2021-12-21 18:21:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:18,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:19,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:19,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 18:21:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:21:19,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040153255] [2021-12-21 18:21:19,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040153255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154938237] [2021-12-21 18:21:19,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:19,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:19,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:19,205 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) [2021-12-21 18:21:19,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-21 18:21:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:19,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-21 18:21:19,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:19,417 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:21:19,418 INFO L387 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 [2021-12-21 18:21:19,712 INFO L353 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-21 18:21:19,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-12-21 18:21:19,824 INFO L387 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 [2021-12-21 18:21:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:19,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:19,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154938237] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:19,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:21:19,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-12-21 18:21:19,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993582378] [2021-12-21 18:21:19,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:19,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-21 18:21:19,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:19,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-21 18:21:19,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-12-21 18:21:19,993 INFO L87 Difference]: Start difference. First operand 285 states and 320 transitions. Second operand has 28 states, 26 states have (on average 4.153846153846154) internal successors, (108), 24 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) [2021-12-21 18:21:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:21,179 INFO L93 Difference]: Finished difference Result 322 states and 354 transitions. [2021-12-21 18:21:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-21 18:21:21,179 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 4.153846153846154) internal successors, (108), 24 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 [2021-12-21 18:21:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:21,180 INFO L225 Difference]: With dead ends: 322 [2021-12-21 18:21:21,180 INFO L226 Difference]: Without dead ends: 322 [2021-12-21 18:21:21,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=553, Invalid=3107, Unknown=0, NotChecked=0, Total=3660 [2021-12-21 18:21:21,181 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 445 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:21,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 330 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 562 Invalid, 0 Unknown, 174 Unchecked, 0.3s Time] [2021-12-21 18:21:21,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-12-21 18:21:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 284. [2021-12-21 18:21:21,184 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) [2021-12-21 18:21:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 319 transitions. [2021-12-21 18:21:21,185 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 319 transitions. Word has length 60 [2021-12-21 18:21:21,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:21,185 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 319 transitions. [2021-12-21 18:21:21,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 4.153846153846154) internal successors, (108), 24 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) [2021-12-21 18:21:21,185 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 319 transitions. [2021-12-21 18:21:21,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 18:21:21,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:21,186 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] [2021-12-21 18:21:21,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:21,386 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 [2021-12-21 18:21:21,386 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-21 18:21:21,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:21,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1476474522, now seen corresponding path program 1 times [2021-12-21 18:21:21,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:21,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318776688] [2021-12-21 18:21:21,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:21,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:21,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:21,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 18:21:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:21:21,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:21,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318776688] [2021-12-21 18:21:21,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318776688] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:21,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367775296] [2021-12-21 18:21:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:21,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:21,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:21,747 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) [2021-12-21 18:21:21,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-21 18:21:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:21,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-21 18:21:21,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:22,354 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:21:22,354 INFO L387 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 [2021-12-21 18:21:22,374 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:21:22,375 INFO L387 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 [2021-12-21 18:21:22,806 INFO L387 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 [2021-12-21 18:21:22,945 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:21:22,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-21 18:21:22,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:21:22,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-12-21 18:21:23,379 INFO L387 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 [2021-12-21 18:21:23,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:21:23,382 INFO L387 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 [2021-12-21 18:21:23,419 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:21:23,419 INFO L387 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 [2021-12-21 18:21:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:23,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:23,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-21 18:21:23,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367775296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:23,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:21:23,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 33 [2021-12-21 18:21:23,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912838906] [2021-12-21 18:21:23,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:23,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-21 18:21:23,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:23,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-21 18:21:23,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2021-12-21 18:21:23,754 INFO L87 Difference]: Start difference. First operand 284 states and 319 transitions. Second operand has 35 states, 32 states have (on average 3.5) internal successors, (112), 28 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:21:26,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:26,401 INFO L93 Difference]: Finished difference Result 505 states and 559 transitions. [2021-12-21 18:21:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-21 18:21:26,402 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 3.5) internal successors, (112), 28 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 61 [2021-12-21 18:21:26,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:26,403 INFO L225 Difference]: With dead ends: 505 [2021-12-21 18:21:26,403 INFO L226 Difference]: Without dead ends: 505 [2021-12-21 18:21:26,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=935, Invalid=5707, Unknown=0, NotChecked=0, Total=6642 [2021-12-21 18:21:26,405 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 950 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1041 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:26,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [950 Valid, 555 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 782 Invalid, 0 Unknown, 1041 Unchecked, 0.5s Time] [2021-12-21 18:21:26,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-12-21 18:21:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 283. [2021-12-21 18:21:26,410 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) [2021-12-21 18:21:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 318 transitions. [2021-12-21 18:21:26,411 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 318 transitions. Word has length 61 [2021-12-21 18:21:26,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:26,411 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 318 transitions. [2021-12-21 18:21:26,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 3.5) internal successors, (112), 28 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:21:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 318 transitions. [2021-12-21 18:21:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 18:21:26,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:26,412 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] [2021-12-21 18:21:26,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-21 18:21:26,622 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 [2021-12-21 18:21:26,623 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-21 18:21:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:26,623 INFO L85 PathProgramCache]: Analyzing trace with hash 586619876, now seen corresponding path program 1 times [2021-12-21 18:21:26,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:26,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952190983] [2021-12-21 18:21:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:26,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:26,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:26,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 18:21:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:21:26,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:26,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952190983] [2021-12-21 18:21:26,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952190983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:26,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300406167] [2021-12-21 18:21:26,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:26,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:21:26,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:26,717 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) [2021-12-21 18:21:26,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-21 18:21:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:26,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-21 18:21:26,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:26,809 INFO L387 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 [2021-12-21 18:21:26,941 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:21:26,942 INFO L387 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 [2021-12-21 18:21:26,979 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:21:26,979 INFO L387 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 [2021-12-21 18:21:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:26,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:27,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300406167] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:27,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:21:27,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-12-21 18:21:27,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898282730] [2021-12-21 18:21:27,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:27,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:21:27,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:27,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:21:27,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:21:27,059 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) [2021-12-21 18:21:27,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:27,194 INFO L93 Difference]: Finished difference Result 294 states and 328 transitions. [2021-12-21 18:21:27,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:21:27,195 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 [2021-12-21 18:21:27,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:27,195 INFO L225 Difference]: With dead ends: 294 [2021-12-21 18:21:27,195 INFO L226 Difference]: Without dead ends: 294 [2021-12-21 18:21:27,196 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 [2021-12-21 18:21:27,196 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 69 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:27,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 180 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 155 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2021-12-21 18:21:27,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-21 18:21:27,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 241. [2021-12-21 18:21:27,199 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) [2021-12-21 18:21:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 271 transitions. [2021-12-21 18:21:27,199 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 271 transitions. Word has length 66 [2021-12-21 18:21:27,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:27,199 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 271 transitions. [2021-12-21 18:21:27,199 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) [2021-12-21 18:21:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 271 transitions. [2021-12-21 18:21:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 18:21:27,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:27,200 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] [2021-12-21 18:21:27,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-21 18:21:27,417 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 [2021-12-21 18:21:27,417 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-12-21 18:21:27,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1008566956, now seen corresponding path program 1 times [2021-12-21 18:21:27,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:27,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40387428] [2021-12-21 18:21:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:27,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:27,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:21:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:27,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 18:21:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:27,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 18:21:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-21 18:21:27,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:21:27,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40387428] [2021-12-21 18:21:27,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40387428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:21:27,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:21:27,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:21:27,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971910961] [2021-12-21 18:21:27,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:21:27,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:21:27,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:21:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:21:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:21:27,466 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) [2021-12-21 18:21:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:27,489 INFO L93 Difference]: Finished difference Result 249 states and 278 transitions. [2021-12-21 18:21:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:21:27,490 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 [2021-12-21 18:21:27,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:27,490 INFO L225 Difference]: With dead ends: 249 [2021-12-21 18:21:27,490 INFO L226 Difference]: Without dead ends: 240 [2021-12-21 18:21:27,490 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 [2021-12-21 18:21:27,492 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:27,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 59 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:21:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-21 18:21:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 234. [2021-12-21 18:21:27,495 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) [2021-12-21 18:21:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 261 transitions. [2021-12-21 18:21:27,495 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 261 transitions. Word has length 67 [2021-12-21 18:21:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:27,496 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 261 transitions. [2021-12-21 18:21:27,496 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) [2021-12-21 18:21:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 261 transitions. [2021-12-21 18:21:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 18:21:27,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:27,497 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] [2021-12-21 18:21:27,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-21 18:21:27,497 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)] === [2021-12-21 18:21:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:27,497 INFO L85 PathProgramCache]: Analyzing trace with hash 272552823, now seen corresponding path program 1 times [2021-12-21 18:21:27,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:21:27,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779985879] [2021-12-21 18:21:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:27,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:21:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 18:21:27,511 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 18:21:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 18:21:27,546 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 18:21:27,546 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 18:21:27,547 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2021-12-21 18:21:27,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATION (18 of 20 remaining) [2021-12-21 18:21:27,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATION (17 of 20 remaining) [2021-12-21 18:21:27,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2021-12-21 18:21:27,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2021-12-21 18:21:27,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2021-12-21 18:21:27,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2021-12-21 18:21:27,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATION (12 of 20 remaining) [2021-12-21 18:21:27,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATION (11 of 20 remaining) [2021-12-21 18:21:27,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATION (10 of 20 remaining) [2021-12-21 18:21:27,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATION (9 of 20 remaining) [2021-12-21 18:21:27,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2021-12-21 18:21:27,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2021-12-21 18:21:27,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2021-12-21 18:21:27,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2021-12-21 18:21:27,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2021-12-21 18:21:27,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2021-12-21 18:21:27,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2021-12-21 18:21:27,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2021-12-21 18:21:27,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2021-12-21 18:21:27,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-21 18:21:27,552 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] [2021-12-21 18:21:27,555 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 18:21:27,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 06:21:27 BoogieIcfgContainer [2021-12-21 18:21:27,625 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 18:21:27,626 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 18:21:27,626 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 18:21:27,626 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 18:21:27,627 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:20:46" (3/4) ... [2021-12-21 18:21:27,629 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-21 18:21:27,629 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 18:21:27,630 INFO L158 Benchmark]: Toolchain (without parser) took 41809.82ms. Allocated memory was 109.1MB in the beginning and 201.3MB in the end (delta: 92.3MB). Free memory was 69.1MB in the beginning and 140.5MB in the end (delta: -71.4MB). Peak memory consumption was 21.1MB. Max. memory is 16.1GB. [2021-12-21 18:21:27,630 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 109.1MB. Free memory is still 87.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 18:21:27,631 INFO L158 Benchmark]: CACSL2BoogieTranslator took 357.13ms. Allocated memory is still 109.1MB. Free memory was 68.9MB in the beginning and 75.0MB in the end (delta: -6.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 18:21:27,631 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.70ms. Allocated memory is still 109.1MB. Free memory was 75.0MB in the beginning and 72.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 18:21:27,631 INFO L158 Benchmark]: Boogie Preprocessor took 21.76ms. Allocated memory is still 109.1MB. Free memory was 72.9MB in the beginning and 71.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 18:21:27,631 INFO L158 Benchmark]: RCFGBuilder took 352.14ms. Allocated memory is still 109.1MB. Free memory was 71.1MB in the beginning and 57.1MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-21 18:21:27,631 INFO L158 Benchmark]: TraceAbstraction took 41007.11ms. Allocated memory was 109.1MB in the beginning and 201.3MB in the end (delta: 92.3MB). Free memory was 56.8MB in the beginning and 140.5MB in the end (delta: -83.7MB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. [2021-12-21 18:21:27,631 INFO L158 Benchmark]: Witness Printer took 3.61ms. Allocated memory is still 201.3MB. Free memory is still 140.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 18:21:27,635 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 109.1MB. Free memory is still 87.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 357.13ms. Allocated memory is still 109.1MB. Free memory was 68.9MB in the beginning and 75.0MB in the end (delta: -6.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.70ms. Allocated memory is still 109.1MB. Free memory was 75.0MB in the beginning and 72.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.76ms. Allocated memory is still 109.1MB. Free memory was 72.9MB in the beginning and 71.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 352.14ms. Allocated memory is still 109.1MB. Free memory was 71.1MB in the beginning and 57.1MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 41007.11ms. Allocated memory was 109.1MB in the beginning and 201.3MB in the end (delta: 92.3MB). Free memory was 56.8MB in the beginning and 140.5MB in the end (delta: -83.7MB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. * Witness Printer took 3.61ms. Allocated memory is still 201.3MB. Free memory is still 140.5MB. 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: 40.9s, OverallIterations: 41, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 14.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11142 SdHoareTripleChecker+Valid, 5.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11138 mSDsluCounter, 9664 SdHoareTripleChecker+Invalid, 4.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2258 IncrementalHoareTripleChecker+Unchecked, 7665 mSDsCounter, 1411 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9357 IncrementalHoareTripleChecker+Invalid, 13026 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1411 mSolverCounterUnsat, 1999 mSDtfsCounter, 9357 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2665 GetRequests, 1845 SyntacticMatches, 34 SemanticMatches, 786 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7843 ImplicationChecksByTransitivity, 12.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=486occurred in iteration=20, InterpolantAutomatonStates: 521, 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, 40 MinimizatonAttempts, 2376 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 16.9s InterpolantComputationTime, 2919 NumberOfCodeBlocks, 2919 NumberOfCodeBlocksAsserted, 73 NumberOfCheckSat, 3251 ConstructedInterpolants, 182 QuantifiedInterpolants, 33735 SizeOfPredicates, 119 NumberOfNonLiveVariables, 8309 ConjunctsInSsa, 559 ConjunctsInUnsatCore, 84 InterpolantComputations, 16 PerfectInterpolantSequences, 1393/2325 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 [2021-12-21 18:21:27,666 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-dev-ff03de6 [2021-12-21 18:21:29,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:21:29,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:21:29,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:21:29,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:21:29,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:21:29,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:21:29,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:21:29,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:21:29,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:21:29,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:21:29,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:21:29,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:21:29,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:21:29,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:21:29,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:21:29,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:21:29,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:21:29,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:21:29,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:21:29,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:21:29,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:21:29,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:21:29,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:21:29,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:21:29,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:21:29,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:21:29,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:21:29,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:21:29,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:21:29,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:21:29,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:21:29,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:21:29,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:21:29,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:21:29,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:21:29,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:21:29,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:21:29,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:21:29,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:21:29,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:21:29,349 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-21 18:21:29,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:21:29,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:21:29,365 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:21:29,366 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:21:29,366 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:21:29,366 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:21:29,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:21:29,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:21:29,367 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:21:29,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:21:29,367 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:21:29,367 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:21:29,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:21:29,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:21:29,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:21:29,368 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:21:29,368 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:21:29,368 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:21:29,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:21:29,368 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:21:29,368 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 18:21:29,368 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 18:21:29,368 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:21:29,369 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:21:29,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:21:29,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:21:29,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:21:29,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:21:29,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:21:29,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:21:29,369 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 18:21:29,369 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 18:21:29,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:21:29,370 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 18:21:29,370 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2021-12-21 18:21:29,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:21:29,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:21:29,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:21:29,635 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:21:29,635 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:21:29,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-12-21 18:21:29,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0499dd56f/b9ee36462a09472db6c5000cb7630060/FLAGf9a673d73 [2021-12-21 18:21:30,045 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:21:30,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-12-21 18:21:30,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0499dd56f/b9ee36462a09472db6c5000cb7630060/FLAGf9a673d73 [2021-12-21 18:21:30,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0499dd56f/b9ee36462a09472db6c5000cb7630060 [2021-12-21 18:21:30,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:21:30,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:21:30,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:21:30,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:21:30,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:21:30,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:21:30" (1/1) ... [2021-12-21 18:21:30,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7155a2dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:21:30, skipping insertion in model container [2021-12-21 18:21:30,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:21:30" (1/1) ... [2021-12-21 18:21:30,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:21:30,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:21:30,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:21:30,403 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:21:30,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:21:30,482 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:21:30,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:21:30 WrapperNode [2021-12-21 18:21:30,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:21:30,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:21:30,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:21:30,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:21:30,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:21:30" (1/1) ... [2021-12-21 18:21:30,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:21:30" (1/1) ... [2021-12-21 18:21:30,518 INFO L137 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2021-12-21 18:21:30,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:21:30,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:21:30,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:21:30,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:21:30,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:21:30" (1/1) ... [2021-12-21 18:21:30,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:21:30" (1/1) ... [2021-12-21 18:21:30,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:21:30" (1/1) ... [2021-12-21 18:21:30,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:21:30" (1/1) ... [2021-12-21 18:21:30,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:21:30" (1/1) ... [2021-12-21 18:21:30,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:21:30" (1/1) ... [2021-12-21 18:21:30,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:21:30" (1/1) ... [2021-12-21 18:21:30,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:21:30,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:21:30,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:21:30,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:21:30,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:21:30" (1/1) ... [2021-12-21 18:21:30,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:21:30,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:21:30,598 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) [2021-12-21 18:21:30,605 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 [2021-12-21 18:21:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-21 18:21:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-12-21 18:21:30,639 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-12-21 18:21:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 18:21:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 18:21:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 18:21:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:21:30,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 18:21:30,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 18:21:30,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:21:30,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:21:30,756 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:21:30,757 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:21:30,996 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:21:31,001 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:21:31,001 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 18:21:31,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:21:31 BoogieIcfgContainer [2021-12-21 18:21:31,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:21:31,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:21:31,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:21:31,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:21:31,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:21:30" (1/3) ... [2021-12-21 18:21:31,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64baf029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:21:31, skipping insertion in model container [2021-12-21 18:21:31,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:21:30" (2/3) ... [2021-12-21 18:21:31,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64baf029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:21:31, skipping insertion in model container [2021-12-21 18:21:31,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:21:31" (3/3) ... [2021-12-21 18:21:31,007 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2021-12-21 18:21:31,010 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:21:31,010 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-12-21 18:21:31,035 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:21:31,039 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 [2021-12-21 18:21:31,040 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-12-21 18:21:31,048 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) [2021-12-21 18:21:31,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:21:31,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:31,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:21:31,053 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)] === [2021-12-21 18:21:31,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:31,056 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2021-12-21 18:21:31,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:21:31,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25500846] [2021-12-21 18:21:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:31,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:21:31,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:21:31,066 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) [2021-12-21 18:21:31,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 18:21:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:31,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 18:21:31,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:31,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:21:31,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:21:31,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25500846] [2021-12-21 18:21:31,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25500846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:21:31,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:21:31,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-21 18:21:31,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880946058] [2021-12-21 18:21:31,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:21:31,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:21:31,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:21:31,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:21:31,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:21:31,255 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) [2021-12-21 18:21:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:31,376 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2021-12-21 18:21:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:21:31,378 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 [2021-12-21 18:21:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:31,384 INFO L225 Difference]: With dead ends: 110 [2021-12-21 18:21:31,384 INFO L226 Difference]: Without dead ends: 106 [2021-12-21 18:21:31,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:21:31,388 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 [2021-12-21 18:21:31,388 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] [2021-12-21 18:21:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-21 18:21:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2021-12-21 18:21:31,414 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) [2021-12-21 18:21:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2021-12-21 18:21:31,417 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 6 [2021-12-21 18:21:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:31,418 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2021-12-21 18:21:31,418 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) [2021-12-21 18:21:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2021-12-21 18:21:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:21:31,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:31,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:21:31,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:31,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:21:31,626 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)] === [2021-12-21 18:21:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:31,629 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2021-12-21 18:21:31,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:21:31,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050299109] [2021-12-21 18:21:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:31,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:21:31,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:21:31,632 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) [2021-12-21 18:21:31,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 18:21:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:31,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 18:21:31,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:31,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:21:31,783 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:21:31,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050299109] [2021-12-21 18:21:31,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050299109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:21:31,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:21:31,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:21:31,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761713154] [2021-12-21 18:21:31,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:21:31,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:21:31,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:21:31,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:21:31,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:21:31,789 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) [2021-12-21 18:21:31,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:31,997 INFO L93 Difference]: Finished difference Result 206 states and 278 transitions. [2021-12-21 18:21:31,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:21:31,998 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 [2021-12-21 18:21:31,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:32,000 INFO L225 Difference]: With dead ends: 206 [2021-12-21 18:21:32,001 INFO L226 Difference]: Without dead ends: 206 [2021-12-21 18:21:32,002 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 [2021-12-21 18:21:32,003 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:32,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 142 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:21:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-21 18:21:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2021-12-21 18:21:32,026 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) [2021-12-21 18:21:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 238 transitions. [2021-12-21 18:21:32,031 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 238 transitions. Word has length 6 [2021-12-21 18:21:32,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:32,032 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 238 transitions. [2021-12-21 18:21:32,032 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) [2021-12-21 18:21:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 238 transitions. [2021-12-21 18:21:32,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 18:21:32,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:32,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:21:32,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:32,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:21:32,239 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)] === [2021-12-21 18:21:32,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:32,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2021-12-21 18:21:32,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:21:32,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611778626] [2021-12-21 18:21:32,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:32,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:21:32,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:21:32,242 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) [2021-12-21 18:21:32,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 18:21:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:32,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 18:21:32,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:32,399 INFO L387 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 [2021-12-21 18:21:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:32,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:21:32,410 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:21:32,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611778626] [2021-12-21 18:21:32,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611778626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:21:32,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:21:32,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:21:32,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203331155] [2021-12-21 18:21:32,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:21:32,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:21:32,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:21:32,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:21:32,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:21:32,415 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) [2021-12-21 18:21:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:32,610 INFO L93 Difference]: Finished difference Result 228 states and 325 transitions. [2021-12-21 18:21:32,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:21:32,610 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 [2021-12-21 18:21:32,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:32,612 INFO L225 Difference]: With dead ends: 228 [2021-12-21 18:21:32,612 INFO L226 Difference]: Without dead ends: 228 [2021-12-21 18:21:32,612 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 [2021-12-21 18:21:32,613 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 [2021-12-21 18:21:32,613 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] [2021-12-21 18:21:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-21 18:21:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2021-12-21 18:21:32,627 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) [2021-12-21 18:21:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 241 transitions. [2021-12-21 18:21:32,628 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 241 transitions. Word has length 7 [2021-12-21 18:21:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:32,629 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 241 transitions. [2021-12-21 18:21:32,629 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) [2021-12-21 18:21:32,629 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 241 transitions. [2021-12-21 18:21:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 18:21:32,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:32,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:21:32,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:32,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:21:32,834 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)] === [2021-12-21 18:21:32,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:32,835 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2021-12-21 18:21:32,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:21:32,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50283325] [2021-12-21 18:21:32,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:32,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:21:32,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:21:32,837 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) [2021-12-21 18:21:32,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-21 18:21:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:32,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 18:21:32,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:32,974 INFO L387 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 [2021-12-21 18:21:32,977 INFO L387 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 [2021-12-21 18:21:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:32,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:21:32,994 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:21:32,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50283325] [2021-12-21 18:21:32,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50283325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:21:32,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:21:32,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:21:32,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644979681] [2021-12-21 18:21:32,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:21:32,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:21:32,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:21:32,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:21:32,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:21:32,996 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) [2021-12-21 18:21:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:33,214 INFO L93 Difference]: Finished difference Result 208 states and 279 transitions. [2021-12-21 18:21:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:21:33,215 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 [2021-12-21 18:21:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:33,216 INFO L225 Difference]: With dead ends: 208 [2021-12-21 18:21:33,216 INFO L226 Difference]: Without dead ends: 208 [2021-12-21 18:21:33,217 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 [2021-12-21 18:21:33,217 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 128 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:33,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 190 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:21:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-21 18:21:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2021-12-21 18:21:33,226 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) [2021-12-21 18:21:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 239 transitions. [2021-12-21 18:21:33,227 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 239 transitions. Word has length 8 [2021-12-21 18:21:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:33,227 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 239 transitions. [2021-12-21 18:21:33,227 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) [2021-12-21 18:21:33,227 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 239 transitions. [2021-12-21 18:21:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 18:21:33,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:33,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:21:33,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-21 18:21:33,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:21:33,435 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)] === [2021-12-21 18:21:33,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:33,435 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2021-12-21 18:21:33,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:21:33,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102014449] [2021-12-21 18:21:33,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:33,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:21:33,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:21:33,437 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) [2021-12-21 18:21:33,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-21 18:21:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:33,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 18:21:33,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:33,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:21:33,534 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:21:33,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102014449] [2021-12-21 18:21:33,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102014449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:21:33,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:21:33,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:21:33,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763388125] [2021-12-21 18:21:33,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:21:33,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:21:33,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:21:33,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:21:33,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:21:33,535 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) [2021-12-21 18:21:33,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:33,674 INFO L93 Difference]: Finished difference Result 234 states and 321 transitions. [2021-12-21 18:21:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:21:33,675 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 [2021-12-21 18:21:33,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:33,676 INFO L225 Difference]: With dead ends: 234 [2021-12-21 18:21:33,676 INFO L226 Difference]: Without dead ends: 234 [2021-12-21 18:21:33,676 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 [2021-12-21 18:21:33,677 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 [2021-12-21 18:21:33,677 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] [2021-12-21 18:21:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-21 18:21:33,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 191. [2021-12-21 18:21:33,683 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) [2021-12-21 18:21:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 289 transitions. [2021-12-21 18:21:33,685 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 289 transitions. Word has length 9 [2021-12-21 18:21:33,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:33,685 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 289 transitions. [2021-12-21 18:21:33,685 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) [2021-12-21 18:21:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 289 transitions. [2021-12-21 18:21:33,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 18:21:33,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:33,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:21:33,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:33,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:21:33,896 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)] === [2021-12-21 18:21:33,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:33,896 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2021-12-21 18:21:33,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:21:33,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669296447] [2021-12-21 18:21:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:33,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:21:33,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:21:33,898 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) [2021-12-21 18:21:33,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-21 18:21:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:33,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 18:21:33,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:34,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:21:34,022 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:21:34,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669296447] [2021-12-21 18:21:34,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669296447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:21:34,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:21:34,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:21:34,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319052223] [2021-12-21 18:21:34,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:21:34,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:21:34,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:21:34,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:21:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:21:34,028 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) [2021-12-21 18:21:34,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:34,179 INFO L93 Difference]: Finished difference Result 231 states and 304 transitions. [2021-12-21 18:21:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:21:34,180 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 [2021-12-21 18:21:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:34,181 INFO L225 Difference]: With dead ends: 231 [2021-12-21 18:21:34,181 INFO L226 Difference]: Without dead ends: 231 [2021-12-21 18:21:34,181 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 [2021-12-21 18:21:34,182 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 [2021-12-21 18:21:34,182 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] [2021-12-21 18:21:34,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-21 18:21:34,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2021-12-21 18:21:34,192 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) [2021-12-21 18:21:34,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 302 transitions. [2021-12-21 18:21:34,195 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 302 transitions. Word has length 10 [2021-12-21 18:21:34,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:34,196 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 302 transitions. [2021-12-21 18:21:34,196 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) [2021-12-21 18:21:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 302 transitions. [2021-12-21 18:21:34,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 18:21:34,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:34,196 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:21:34,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:34,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:21:34,403 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)] === [2021-12-21 18:21:34,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:34,404 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2021-12-21 18:21:34,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:21:34,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515442710] [2021-12-21 18:21:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:34,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:21:34,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:21:34,405 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) [2021-12-21 18:21:34,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-21 18:21:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:34,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 18:21:34,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:34,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:34,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:21:34,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515442710] [2021-12-21 18:21:34,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515442710] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:21:34,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:21:34,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-12-21 18:21:34,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846519080] [2021-12-21 18:21:34,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:34,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:21:34,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:21:34,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:21:34,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:21:34,959 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) [2021-12-21 18:21:35,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:35,359 INFO L93 Difference]: Finished difference Result 367 states and 495 transitions. [2021-12-21 18:21:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:21:35,360 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 [2021-12-21 18:21:35,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:35,362 INFO L225 Difference]: With dead ends: 367 [2021-12-21 18:21:35,362 INFO L226 Difference]: Without dead ends: 367 [2021-12-21 18:21:35,362 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 [2021-12-21 18:21:35,362 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:35,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 312 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:21:35,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-21 18:21:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 239. [2021-12-21 18:21:35,374 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) [2021-12-21 18:21:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 363 transitions. [2021-12-21 18:21:35,382 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 363 transitions. Word has length 14 [2021-12-21 18:21:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:35,382 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 363 transitions. [2021-12-21 18:21:35,382 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) [2021-12-21 18:21:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 363 transitions. [2021-12-21 18:21:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 18:21:35,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:35,383 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:21:35,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:35,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:21:35,592 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)] === [2021-12-21 18:21:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:35,592 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2021-12-21 18:21:35,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:21:35,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261289094] [2021-12-21 18:21:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:35,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:21:35,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:21:35,594 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) [2021-12-21 18:21:35,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-21 18:21:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:35,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 18:21:35,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:35,782 INFO L387 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 [2021-12-21 18:21:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:35,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:35,902 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:21:35,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261289094] [2021-12-21 18:21:35,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261289094] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:21:35,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:21:35,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-12-21 18:21:35,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708960164] [2021-12-21 18:21:35,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:35,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:21:35,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:21:35,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:21:35,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:21:35,903 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) [2021-12-21 18:21:36,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:36,211 INFO L93 Difference]: Finished difference Result 405 states and 567 transitions. [2021-12-21 18:21:36,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:21:36,211 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 [2021-12-21 18:21:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:36,213 INFO L225 Difference]: With dead ends: 405 [2021-12-21 18:21:36,213 INFO L226 Difference]: Without dead ends: 405 [2021-12-21 18:21:36,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:21:36,214 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 [2021-12-21 18:21:36,214 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] [2021-12-21 18:21:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-21 18:21:36,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 249. [2021-12-21 18:21:36,220 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) [2021-12-21 18:21:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 378 transitions. [2021-12-21 18:21:36,221 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 378 transitions. Word has length 15 [2021-12-21 18:21:36,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:36,221 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 378 transitions. [2021-12-21 18:21:36,221 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) [2021-12-21 18:21:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 378 transitions. [2021-12-21 18:21:36,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 18:21:36,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:36,222 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:21:36,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:36,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:21:36,429 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)] === [2021-12-21 18:21:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:36,429 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2021-12-21 18:21:36,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:21:36,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977766043] [2021-12-21 18:21:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:36,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:21:36,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:21:36,431 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) [2021-12-21 18:21:36,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-21 18:21:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:36,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 18:21:36,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:36,694 INFO L387 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 [2021-12-21 18:21:36,700 INFO L387 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 [2021-12-21 18:21:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:36,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:36,857 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:21:36,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977766043] [2021-12-21 18:21:36,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977766043] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:21:36,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:21:36,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-12-21 18:21:36,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79695911] [2021-12-21 18:21:36,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:36,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:21:36,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:21:36,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:21:36,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:21:36,858 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) [2021-12-21 18:21:37,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:37,638 INFO L93 Difference]: Finished difference Result 626 states and 845 transitions. [2021-12-21 18:21:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:21:37,639 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 [2021-12-21 18:21:37,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:37,641 INFO L225 Difference]: With dead ends: 626 [2021-12-21 18:21:37,642 INFO L226 Difference]: Without dead ends: 626 [2021-12-21 18:21:37,642 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 [2021-12-21 18:21:37,642 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 [2021-12-21 18:21:37,643 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] [2021-12-21 18:21:37,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-12-21 18:21:37,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 349. [2021-12-21 18:21:37,655 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) [2021-12-21 18:21:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 548 transitions. [2021-12-21 18:21:37,657 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 548 transitions. Word has length 16 [2021-12-21 18:21:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:37,657 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 548 transitions. [2021-12-21 18:21:37,657 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) [2021-12-21 18:21:37,657 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 548 transitions. [2021-12-21 18:21:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 18:21:37,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:37,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:21:37,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:37,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:21:37,866 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)] === [2021-12-21 18:21:37,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:37,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2021-12-21 18:21:37,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:21:37,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272542039] [2021-12-21 18:21:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:37,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:21:37,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:21:37,868 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) [2021-12-21 18:21:37,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-21 18:21:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:37,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 18:21:37,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:38,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:21:38,002 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:21:38,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272542039] [2021-12-21 18:21:38,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272542039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:21:38,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:21:38,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:21:38,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271582849] [2021-12-21 18:21:38,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:21:38,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:21:38,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:21:38,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:21:38,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:21:38,003 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) [2021-12-21 18:21:38,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:38,023 INFO L93 Difference]: Finished difference Result 378 states and 554 transitions. [2021-12-21 18:21:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:21:38,024 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 [2021-12-21 18:21:38,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:38,025 INFO L225 Difference]: With dead ends: 378 [2021-12-21 18:21:38,025 INFO L226 Difference]: Without dead ends: 378 [2021-12-21 18:21:38,025 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 [2021-12-21 18:21:38,026 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 [2021-12-21 18:21:38,026 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] [2021-12-21 18:21:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-12-21 18:21:38,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 367. [2021-12-21 18:21:38,032 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) [2021-12-21 18:21:38,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 551 transitions. [2021-12-21 18:21:38,034 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 551 transitions. Word has length 18 [2021-12-21 18:21:38,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:38,034 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 551 transitions. [2021-12-21 18:21:38,034 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) [2021-12-21 18:21:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 551 transitions. [2021-12-21 18:21:38,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 18:21:38,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:38,035 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-21 18:21:38,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:38,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:21:38,241 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)] === [2021-12-21 18:21:38,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:38,242 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 2 times [2021-12-21 18:21:38,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:21:38,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372068053] [2021-12-21 18:21:38,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:21:38,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:21:38,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:21:38,243 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) [2021-12-21 18:21:38,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-21 18:21:38,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:21:38,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:21:38,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 18:21:38,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:38,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:39,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:21:39,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372068053] [2021-12-21 18:21:39,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372068053] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:21:39,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:21:39,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-12-21 18:21:39,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942432011] [2021-12-21 18:21:39,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:21:39,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:21:39,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:21:39,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:21:39,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:21:39,213 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) [2021-12-21 18:21:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:41,126 INFO L93 Difference]: Finished difference Result 620 states and 878 transitions. [2021-12-21 18:21:41,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:21:41,127 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 [2021-12-21 18:21:41,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:41,129 INFO L225 Difference]: With dead ends: 620 [2021-12-21 18:21:41,129 INFO L226 Difference]: Without dead ends: 620 [2021-12-21 18:21:41,129 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 [2021-12-21 18:21:41,130 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 458 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:21:41,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 360 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 18:21:41,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-12-21 18:21:41,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 402. [2021-12-21 18:21:41,137 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) [2021-12-21 18:21:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 618 transitions. [2021-12-21 18:21:41,139 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 618 transitions. Word has length 22 [2021-12-21 18:21:41,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:41,139 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 618 transitions. [2021-12-21 18:21:41,140 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) [2021-12-21 18:21:41,140 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 618 transitions. [2021-12-21 18:21:41,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 18:21:41,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:41,140 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] [2021-12-21 18:21:41,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:41,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:21:41,345 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)] === [2021-12-21 18:21:41,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:41,345 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2021-12-21 18:21:41,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:21:41,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363551542] [2021-12-21 18:21:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:41,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:21:41,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:21:41,346 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) [2021-12-21 18:21:41,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-21 18:21:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:41,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 18:21:41,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:41,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:21:41,435 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:21:41,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363551542] [2021-12-21 18:21:41,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363551542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:21:41,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:21:41,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:21:41,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113874897] [2021-12-21 18:21:41,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:21:41,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:21:41,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:21:41,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:21:41,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:21:41,437 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) [2021-12-21 18:21:41,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:21:41,442 INFO L93 Difference]: Finished difference Result 303 states and 456 transitions. [2021-12-21 18:21:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:21:41,443 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 [2021-12-21 18:21:41,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:21:41,444 INFO L225 Difference]: With dead ends: 303 [2021-12-21 18:21:41,444 INFO L226 Difference]: Without dead ends: 303 [2021-12-21 18:21:41,444 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 [2021-12-21 18:21:41,445 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 [2021-12-21 18:21:41,445 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] [2021-12-21 18:21:41,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-12-21 18:21:41,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2021-12-21 18:21:41,450 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) [2021-12-21 18:21:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 456 transitions. [2021-12-21 18:21:41,451 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 456 transitions. Word has length 25 [2021-12-21 18:21:41,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:21:41,451 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 456 transitions. [2021-12-21 18:21:41,452 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) [2021-12-21 18:21:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 456 transitions. [2021-12-21 18:21:41,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 18:21:41,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:21:41,454 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] [2021-12-21 18:21:41,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-21 18:21:41,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:21:41,661 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)] === [2021-12-21 18:21:41,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:21:41,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2021-12-21 18:21:41,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:21:41,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693306664] [2021-12-21 18:21:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:41,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:21:41,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:21:41,663 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) [2021-12-21 18:21:41,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-21 18:21:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:41,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 18:21:41,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:44,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:21:44,057 INFO L387 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 [2021-12-21 18:21:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:44,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:21:44,495 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:21:44,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693306664] [2021-12-21 18:21:44,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693306664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:21:44,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [394445825] [2021-12-21 18:21:44,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:21:44,496 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 18:21:44,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 18:21:44,498 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-21 18:21:44,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-12-21 18:21:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:21:44,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 18:21:44,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:21:46,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:21:46,931 INFO L387 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 [2021-12-21 18:21:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:21:46,962 INFO L328 TraceCheckSpWp]: Computing backward predicates...