./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 00:01:32,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 00:01:32,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 00:01:32,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 00:01:32,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 00:01:32,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 00:01:32,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 00:01:32,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 00:01:32,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 00:01:32,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 00:01:32,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 00:01:32,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 00:01:32,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 00:01:32,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 00:01:32,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 00:01:32,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 00:01:32,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 00:01:32,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 00:01:32,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 00:01:32,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 00:01:32,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 00:01:32,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 00:01:32,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 00:01:32,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 00:01:32,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 00:01:32,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 00:01:32,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 00:01:32,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 00:01:32,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 00:01:32,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 00:01:32,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 00:01:32,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 00:01:32,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 00:01:32,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 00:01:32,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 00:01:32,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 00:01:32,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 00:01:32,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 00:01:32,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 00:01:32,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 00:01:32,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 00:01:32,978 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 00:01:33,016 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 00:01:33,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 00:01:33,021 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 00:01:33,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 00:01:33,022 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 00:01:33,022 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 00:01:33,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 00:01:33,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 00:01:33,023 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 00:01:33,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 00:01:33,024 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 00:01:33,024 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 00:01:33,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 00:01:33,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 00:01:33,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 00:01:33,025 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 00:01:33,025 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 00:01:33,025 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 00:01:33,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 00:01:33,026 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 00:01:33,026 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 00:01:33,026 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 00:01:33,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 00:01:33,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 00:01:33,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 00:01:33,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:01:33,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 00:01:33,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 00:01:33,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 00:01:33,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 00:01:33,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 00:01:33,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a [2021-12-22 00:01:33,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 00:01:33,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 00:01:33,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 00:01:33,302 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 00:01:33,302 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 00:01:33,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-12-22 00:01:33,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0d808178/bab99e28641a4a709acd0df81b3c6ffb/FLAGfb13136e6 [2021-12-22 00:01:33,764 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 00:01:33,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-12-22 00:01:33,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0d808178/bab99e28641a4a709acd0df81b3c6ffb/FLAGfb13136e6 [2021-12-22 00:01:33,790 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0d808178/bab99e28641a4a709acd0df81b3c6ffb [2021-12-22 00:01:33,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 00:01:33,794 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 00:01:33,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 00:01:33,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 00:01:33,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 00:01:33,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:01:33" (1/1) ... [2021-12-22 00:01:33,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36be2798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:33, skipping insertion in model container [2021-12-22 00:01:33,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:01:33" (1/1) ... [2021-12-22 00:01:33,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 00:01:33,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:01:33,985 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-12-22 00:01:34,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:01:34,023 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 00:01:34,031 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-12-22 00:01:34,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:01:34,046 INFO L208 MainTranslator]: Completed translation [2021-12-22 00:01:34,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34 WrapperNode [2021-12-22 00:01:34,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 00:01:34,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 00:01:34,048 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 00:01:34,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 00:01:34,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 00:01:34,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 00:01:34,077 INFO L137 Inliner]: procedures = 19, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 28 [2021-12-22 00:01:34,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 00:01:34,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 00:01:34,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 00:01:34,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 00:01:34,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 00:01:34,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 00:01:34,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 00:01:34,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 00:01:34,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 00:01:34,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 00:01:34,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 00:01:34,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 00:01:34,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 00:01:34,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 00:01:34,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 00:01:34,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (1/1) ... [2021-12-22 00:01:34,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:01:34,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:34,122 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) [2021-12-22 00:01:34,124 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 [2021-12-22 00:01:34,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 00:01:34,147 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 00:01:34,147 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 00:01:34,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 00:01:34,147 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-12-22 00:01:34,148 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-12-22 00:01:34,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 00:01:34,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 00:01:34,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 00:01:34,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 00:01:34,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 00:01:34,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 00:01:34,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 00:01:34,201 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 00:01:34,203 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 00:01:34,387 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 00:01:34,400 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 00:01:34,400 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 00:01:34,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:01:34 BoogieIcfgContainer [2021-12-22 00:01:34,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 00:01:34,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 00:01:34,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 00:01:34,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 00:01:34,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:01:33" (1/3) ... [2021-12-22 00:01:34,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7a4d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:01:34, skipping insertion in model container [2021-12-22 00:01:34,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:34" (2/3) ... [2021-12-22 00:01:34,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7a4d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:01:34, skipping insertion in model container [2021-12-22 00:01:34,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:01:34" (3/3) ... [2021-12-22 00:01:34,413 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2021-12-22 00:01:34,421 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 00:01:34,422 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-12-22 00:01:34,459 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 00:01:34,467 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 [2021-12-22 00:01:34,467 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-12-22 00:01:34,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 43 states have internal predecessors, (47), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 00:01:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 00:01:34,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:34,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:34,494 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:34,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash -727728534, now seen corresponding path program 1 times [2021-12-22 00:01:34,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:34,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050381241] [2021-12-22 00:01:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:34,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:34,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:34,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:34,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050381241] [2021-12-22 00:01:34,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050381241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:34,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:34,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:01:34,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315906171] [2021-12-22 00:01:34,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:34,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 00:01:34,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:34,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 00:01:34,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 00:01:34,749 INFO L87 Difference]: Start difference. First operand has 53 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 43 states have internal predecessors, (47), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:01:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:34,766 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-12-22 00:01:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 00:01:34,768 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-22 00:01:34,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:34,775 INFO L225 Difference]: With dead ends: 53 [2021-12-22 00:01:34,775 INFO L226 Difference]: Without dead ends: 51 [2021-12-22 00:01:34,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 00:01:34,781 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:34,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-22 00:01:34,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-22 00:01:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 00:01:34,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-12-22 00:01:34,823 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 16 [2021-12-22 00:01:34,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:34,823 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-12-22 00:01:34,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:01:34,824 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-12-22 00:01:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 00:01:34,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:34,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:34,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 00:01:34,826 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:34,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:34,829 INFO L85 PathProgramCache]: Analyzing trace with hash -469563096, now seen corresponding path program 1 times [2021-12-22 00:01:34,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:34,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350451770] [2021-12-22 00:01:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:34,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:34,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:35,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:35,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350451770] [2021-12-22 00:01:35,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350451770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:35,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:35,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:01:35,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169386382] [2021-12-22 00:01:35,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:35,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:01:35,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:35,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:01:35,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:01:35,016 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:01:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:35,136 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2021-12-22 00:01:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:01:35,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-22 00:01:35,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:35,139 INFO L225 Difference]: With dead ends: 96 [2021-12-22 00:01:35,139 INFO L226 Difference]: Without dead ends: 96 [2021-12-22 00:01:35,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:01:35,140 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 47 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:35,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 270 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:01:35,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-22 00:01:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2021-12-22 00:01:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 58 states have internal predecessors, (69), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 00:01:35,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-12-22 00:01:35,153 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 16 [2021-12-22 00:01:35,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:35,153 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-12-22 00:01:35,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 00:01:35,153 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-12-22 00:01:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 00:01:35,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:35,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:35,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 00:01:35,154 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:35,155 INFO L85 PathProgramCache]: Analyzing trace with hash -470922749, now seen corresponding path program 1 times [2021-12-22 00:01:35,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:35,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449781282] [2021-12-22 00:01:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:35,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 00:01:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:35,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:35,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449781282] [2021-12-22 00:01:35,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449781282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:35,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:35,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:01:35,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287773315] [2021-12-22 00:01:35,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:35,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:01:35,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:35,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:01:35,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:01:35,213 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:35,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:35,228 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2021-12-22 00:01:35,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:01:35,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-12-22 00:01:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:35,230 INFO L225 Difference]: With dead ends: 73 [2021-12-22 00:01:35,230 INFO L226 Difference]: Without dead ends: 73 [2021-12-22 00:01:35,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:01:35,231 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 14 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:35,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 139 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-22 00:01:35,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-22 00:01:35,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.511111111111111) internal successors, (68), 57 states have internal predecessors, (68), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 00:01:35,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2021-12-22 00:01:35,239 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 16 [2021-12-22 00:01:35,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:35,239 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2021-12-22 00:01:35,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2021-12-22 00:01:35,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 00:01:35,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:35,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:35,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 00:01:35,241 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:35,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1713703289, now seen corresponding path program 1 times [2021-12-22 00:01:35,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:35,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223636310] [2021-12-22 00:01:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:35,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 00:01:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:35,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:35,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223636310] [2021-12-22 00:01:35,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223636310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:35,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:35,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:01:35,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678072110] [2021-12-22 00:01:35,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:35,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:01:35,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:35,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:01:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:01:35,333 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:35,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:35,382 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2021-12-22 00:01:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:01:35,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-12-22 00:01:35,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:35,385 INFO L225 Difference]: With dead ends: 72 [2021-12-22 00:01:35,385 INFO L226 Difference]: Without dead ends: 72 [2021-12-22 00:01:35,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:01:35,389 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 11 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:35,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 131 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-22 00:01:35,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-12-22 00:01:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.488888888888889) internal successors, (67), 56 states have internal predecessors, (67), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 00:01:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-12-22 00:01:35,406 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 17 [2021-12-22 00:01:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:35,406 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-12-22 00:01:35,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:35,407 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-12-22 00:01:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 00:01:35,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:35,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:35,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 00:01:35,408 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:35,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:35,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1585194363, now seen corresponding path program 1 times [2021-12-22 00:01:35,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:35,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916952096] [2021-12-22 00:01:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:35,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 00:01:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:35,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:35,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916952096] [2021-12-22 00:01:35,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916952096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:35,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:35,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:01:35,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125790176] [2021-12-22 00:01:35,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:35,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:01:35,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:35,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:01:35,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:01:35,475 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:35,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:35,504 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2021-12-22 00:01:35,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:01:35,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-22 00:01:35,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:35,505 INFO L225 Difference]: With dead ends: 71 [2021-12-22 00:01:35,505 INFO L226 Difference]: Without dead ends: 71 [2021-12-22 00:01:35,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:01:35,506 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:35,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 115 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:35,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-22 00:01:35,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-12-22 00:01:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 55 states have internal predecessors, (66), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 00:01:35,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-12-22 00:01:35,513 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 18 [2021-12-22 00:01:35,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:35,513 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-12-22 00:01:35,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:35,514 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-12-22 00:01:35,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 00:01:35,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:35,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:35,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 00:01:35,515 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:35,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:35,515 INFO L85 PathProgramCache]: Analyzing trace with hash -41793692, now seen corresponding path program 1 times [2021-12-22 00:01:35,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:35,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671961060] [2021-12-22 00:01:35,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:35,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 00:01:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:35,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:35,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671961060] [2021-12-22 00:01:35,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671961060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:35,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:35,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:01:35,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291070793] [2021-12-22 00:01:35,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:35,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:01:35,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:01:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:01:35,560 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:35,642 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2021-12-22 00:01:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:01:35,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-12-22 00:01:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:35,644 INFO L225 Difference]: With dead ends: 67 [2021-12-22 00:01:35,644 INFO L226 Difference]: Without dead ends: 67 [2021-12-22 00:01:35,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:01:35,650 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 42 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:35,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 98 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:01:35,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-22 00:01:35,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-22 00:01:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.288888888888889) internal successors, (58), 51 states have internal predecessors, (58), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 00:01:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-12-22 00:01:35,664 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 19 [2021-12-22 00:01:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:35,664 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-12-22 00:01:35,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-12-22 00:01:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 00:01:35,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:35,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:35,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 00:01:35,666 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:35,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:35,666 INFO L85 PathProgramCache]: Analyzing trace with hash -41793691, now seen corresponding path program 1 times [2021-12-22 00:01:35,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:35,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954616066] [2021-12-22 00:01:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:35,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 00:01:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:35,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:35,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954616066] [2021-12-22 00:01:35,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954616066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:35,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:35,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 00:01:35,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651417002] [2021-12-22 00:01:35,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:35,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:01:35,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:35,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:01:35,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:01:35,818 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:36,041 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-12-22 00:01:36,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:01:36,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-12-22 00:01:36,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:36,043 INFO L225 Difference]: With dead ends: 84 [2021-12-22 00:01:36,043 INFO L226 Difference]: Without dead ends: 84 [2021-12-22 00:01:36,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:01:36,044 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 55 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:36,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 165 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:01:36,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-22 00:01:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2021-12-22 00:01:36,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 51 states have internal predecessors, (57), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 00:01:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2021-12-22 00:01:36,049 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 19 [2021-12-22 00:01:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:36,050 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2021-12-22 00:01:36,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2021-12-22 00:01:36,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 00:01:36,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:36,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:36,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 00:01:36,051 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:36,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:36,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1896384950, now seen corresponding path program 1 times [2021-12-22 00:01:36,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:36,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455756747] [2021-12-22 00:01:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:36,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:36,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:36,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 00:01:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:36,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:36,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455756747] [2021-12-22 00:01:36,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455756747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:36,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:36,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:01:36,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159155885] [2021-12-22 00:01:36,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:36,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:01:36,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:01:36,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:01:36,103 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:36,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:36,139 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2021-12-22 00:01:36,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:01:36,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-12-22 00:01:36,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:36,140 INFO L225 Difference]: With dead ends: 66 [2021-12-22 00:01:36,140 INFO L226 Difference]: Without dead ends: 61 [2021-12-22 00:01:36,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:01:36,141 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:36,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 138 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:36,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-22 00:01:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-22 00:01:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.3) internal successors, (52), 46 states have internal predecessors, (52), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:01:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-12-22 00:01:36,146 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 19 [2021-12-22 00:01:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:36,146 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-12-22 00:01:36,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-12-22 00:01:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 00:01:36,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:36,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:36,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 00:01:36,147 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:36,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:36,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1295604444, now seen corresponding path program 1 times [2021-12-22 00:01:36,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:36,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9766472] [2021-12-22 00:01:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:36,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:36,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:36,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 00:01:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:36,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:36,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9766472] [2021-12-22 00:01:36,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9766472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:36,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:36,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 00:01:36,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102115730] [2021-12-22 00:01:36,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:36,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:01:36,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:36,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:01:36,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:01:36,298 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:36,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:36,511 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2021-12-22 00:01:36,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 00:01:36,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-12-22 00:01:36,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:36,512 INFO L225 Difference]: With dead ends: 75 [2021-12-22 00:01:36,512 INFO L226 Difference]: Without dead ends: 75 [2021-12-22 00:01:36,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:01:36,513 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 49 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:36,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 183 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:01:36,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-22 00:01:36,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2021-12-22 00:01:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.275) internal successors, (51), 46 states have internal predecessors, (51), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:01:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-12-22 00:01:36,517 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 20 [2021-12-22 00:01:36,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:36,518 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-12-22 00:01:36,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:36,518 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-12-22 00:01:36,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 00:01:36,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:36,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:36,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 00:01:36,519 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:36,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:36,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1218286843, now seen corresponding path program 1 times [2021-12-22 00:01:36,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:36,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706077516] [2021-12-22 00:01:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:36,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:36,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:36,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 00:01:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:36,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:36,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706077516] [2021-12-22 00:01:36,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706077516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:36,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298157456] [2021-12-22 00:01:36,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:36,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:36,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:36,625 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) [2021-12-22 00:01:36,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 00:01:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:36,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 00:01:36,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:36,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:01:36,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298157456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:36,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:01:36,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2021-12-22 00:01:36,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871562079] [2021-12-22 00:01:36,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:36,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:01:36,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:36,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:01:36,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-22 00:01:36,966 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:37,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:37,113 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2021-12-22 00:01:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 00:01:37,113 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-22 00:01:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:37,114 INFO L225 Difference]: With dead ends: 79 [2021-12-22 00:01:37,114 INFO L226 Difference]: Without dead ends: 79 [2021-12-22 00:01:37,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-22 00:01:37,115 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 81 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:37,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 201 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:01:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-22 00:01:37,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2021-12-22 00:01:37,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.255813953488372) internal successors, (54), 49 states have internal predecessors, (54), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:01:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-12-22 00:01:37,119 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 28 [2021-12-22 00:01:37,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:37,119 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-12-22 00:01:37,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 00:01:37,119 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-12-22 00:01:37,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 00:01:37,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:37,120 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:37,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 00:01:37,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 00:01:37,321 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:37,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1513604786, now seen corresponding path program 1 times [2021-12-22 00:01:37,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:37,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291978900] [2021-12-22 00:01:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:37,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:37,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:37,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 00:01:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:37,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 00:01:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:01:37,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:37,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291978900] [2021-12-22 00:01:37,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291978900] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:37,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783731189] [2021-12-22 00:01:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:37,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:37,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:37,473 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) [2021-12-22 00:01:37,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 00:01:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:37,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-22 00:01:37,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:37,605 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 [2021-12-22 00:01:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:37,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:01:38,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783731189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:38,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:38,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-22 00:01:38,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759619519] [2021-12-22 00:01:38,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:38,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 00:01:38,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:38,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 00:01:38,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-12-22 00:01:38,480 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 20 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 10 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-22 00:01:39,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:39,074 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2021-12-22 00:01:39,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 00:01:39,075 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 10 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 31 [2021-12-22 00:01:39,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:39,076 INFO L225 Difference]: With dead ends: 95 [2021-12-22 00:01:39,076 INFO L226 Difference]: Without dead ends: 95 [2021-12-22 00:01:39,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-12-22 00:01:39,077 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 168 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:39,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 339 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 514 Invalid, 0 Unknown, 58 Unchecked, 0.4s Time] [2021-12-22 00:01:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-22 00:01:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 64. [2021-12-22 00:01:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 48 states have internal predecessors, (53), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:01:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-12-22 00:01:39,081 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 31 [2021-12-22 00:01:39,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:39,082 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-12-22 00:01:39,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 10 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-22 00:01:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-12-22 00:01:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 00:01:39,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:39,083 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:39,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:39,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 00:01:39,300 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:39,301 INFO L85 PathProgramCache]: Analyzing trace with hash -322891913, now seen corresponding path program 1 times [2021-12-22 00:01:39,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:39,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248858509] [2021-12-22 00:01:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:39,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:39,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:39,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 00:01:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:39,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 00:01:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:01:39,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:39,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248858509] [2021-12-22 00:01:39,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248858509] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:39,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207301474] [2021-12-22 00:01:39,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:39,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:39,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:39,452 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) [2021-12-22 00:01:39,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 00:01:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:39,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-22 00:01:39,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:39,537 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 [2021-12-22 00:01:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:39,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:01:40,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207301474] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:40,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:40,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-22 00:01:40,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936329158] [2021-12-22 00:01:40,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:40,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 00:01:40,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:40,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 00:01:40,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-12-22 00:01:40,346 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 20 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-22 00:01:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:41,085 INFO L93 Difference]: Finished difference Result 129 states and 154 transitions. [2021-12-22 00:01:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 00:01:41,086 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 32 [2021-12-22 00:01:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:41,087 INFO L225 Difference]: With dead ends: 129 [2021-12-22 00:01:41,087 INFO L226 Difference]: Without dead ends: 129 [2021-12-22 00:01:41,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2021-12-22 00:01:41,088 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 243 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:41,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 317 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 553 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2021-12-22 00:01:41,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-22 00:01:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 40. [2021-12-22 00:01:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 30 states have internal predecessors, (32), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 00:01:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-12-22 00:01:41,092 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 32 [2021-12-22 00:01:41,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:41,093 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-12-22 00:01:41,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-22 00:01:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-12-22 00:01:41,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 00:01:41,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:41,094 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:41,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:41,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:41,300 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:41,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:41,300 INFO L85 PathProgramCache]: Analyzing trace with hash -682717183, now seen corresponding path program 1 times [2021-12-22 00:01:41,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:41,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024345924] [2021-12-22 00:01:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:41,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:41,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:41,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 00:01:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:41,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 00:01:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:41,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 00:01:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 00:01:41,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:41,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024345924] [2021-12-22 00:01:41,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024345924] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:41,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383933565] [2021-12-22 00:01:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:41,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:41,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:41,448 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) [2021-12-22 00:01:41,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 00:01:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:41,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 00:01:41,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 00:01:41,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:42,007 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 38 treesize of output 34 [2021-12-22 00:01:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 00:01:42,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383933565] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:42,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:42,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2021-12-22 00:01:42,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782705571] [2021-12-22 00:01:42,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:42,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 00:01:42,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:42,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 00:01:42,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-12-22 00:01:42,137 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-22 00:01:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:42,699 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2021-12-22 00:01:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 00:01:42,699 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 33 [2021-12-22 00:01:42,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:42,700 INFO L225 Difference]: With dead ends: 86 [2021-12-22 00:01:42,700 INFO L226 Difference]: Without dead ends: 86 [2021-12-22 00:01:42,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-12-22 00:01:42,702 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 202 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:42,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 357 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:01:42,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-22 00:01:42,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 39. [2021-12-22 00:01:42,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 00:01:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-12-22 00:01:42,706 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 33 [2021-12-22 00:01:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:42,706 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-12-22 00:01:42,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-22 00:01:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-12-22 00:01:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 00:01:42,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:42,707 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:42,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:42,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:42,921 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:42,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1038783170, now seen corresponding path program 1 times [2021-12-22 00:01:42,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:42,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414264122] [2021-12-22 00:01:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:42,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:43,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:43,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 00:01:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:43,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 00:01:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:43,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 00:01:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:01:43,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:43,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414264122] [2021-12-22 00:01:43,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414264122] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:43,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766746242] [2021-12-22 00:01:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:43,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:43,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:43,120 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) [2021-12-22 00:01:43,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 00:01:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:43,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-22 00:01:43,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:43,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:43,960 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 31 treesize of output 27 [2021-12-22 00:01:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:01:44,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766746242] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:44,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:44,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 35 [2021-12-22 00:01:44,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134697016] [2021-12-22 00:01:44,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:44,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 00:01:44,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:44,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 00:01:44,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 00:01:44,153 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 36 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 30 states have internal predecessors, (56), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:01:45,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:45,605 INFO L93 Difference]: Finished difference Result 153 states and 195 transitions. [2021-12-22 00:01:45,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-22 00:01:45,606 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 30 states have internal predecessors, (56), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 35 [2021-12-22 00:01:45,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:45,607 INFO L225 Difference]: With dead ends: 153 [2021-12-22 00:01:45,607 INFO L226 Difference]: Without dead ends: 153 [2021-12-22 00:01:45,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=468, Invalid=3314, Unknown=0, NotChecked=0, Total=3782 [2021-12-22 00:01:45,609 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 309 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:45,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 841 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1008 Invalid, 0 Unknown, 287 Unchecked, 0.6s Time] [2021-12-22 00:01:45,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-22 00:01:45,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2021-12-22 00:01:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 77 states have (on average 1.12987012987013) internal successors, (87), 84 states have internal predecessors, (87), 22 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (38), 21 states have call predecessors, (38), 21 states have call successors, (38) [2021-12-22 00:01:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 147 transitions. [2021-12-22 00:01:45,618 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 147 transitions. Word has length 35 [2021-12-22 00:01:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:45,618 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 147 transitions. [2021-12-22 00:01:45,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 30 states have internal predecessors, (56), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 00:01:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 147 transitions. [2021-12-22 00:01:45,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 00:01:45,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:45,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:45,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:45,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 00:01:45,832 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:45,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1388154949, now seen corresponding path program 1 times [2021-12-22 00:01:45,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:45,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466412741] [2021-12-22 00:01:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:45,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:45,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:45,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 00:01:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:45,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 00:01:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:45,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 00:01:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 00:01:45,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:45,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466412741] [2021-12-22 00:01:45,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466412741] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:45,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980038496] [2021-12-22 00:01:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:45,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:45,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:45,968 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) [2021-12-22 00:01:45,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 00:01:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:46,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 00:01:46,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:46,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-12-22 00:01:48,069 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_19 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_19))) is different from true [2021-12-22 00:01:50,114 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_20 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_20))) is different from true [2021-12-22 00:01:52,138 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_21 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_21))) is different from true [2021-12-22 00:01:52,201 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 29 treesize of output 23 [2021-12-22 00:01:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-22 00:01:52,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:54,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980038496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:54,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:01:54,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-12-22 00:01:54,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083081851] [2021-12-22 00:01:54,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:54,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-22 00:01:54,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:54,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-22 00:01:54,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=492, Unknown=3, NotChecked=138, Total=702 [2021-12-22 00:01:54,465 INFO L87 Difference]: Start difference. First operand 113 states and 147 transitions. Second operand has 22 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 6 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 00:01:54,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:54,681 INFO L93 Difference]: Finished difference Result 115 states and 148 transitions. [2021-12-22 00:01:54,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 00:01:54,682 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 6 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 40 [2021-12-22 00:01:54,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:54,683 INFO L225 Difference]: With dead ends: 115 [2021-12-22 00:01:54,683 INFO L226 Difference]: Without dead ends: 115 [2021-12-22 00:01:54,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=125, Invalid=814, Unknown=3, NotChecked=180, Total=1122 [2021-12-22 00:01:54,684 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 29 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:54,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 297 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 258 Unchecked, 0.1s Time] [2021-12-22 00:01:54,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-22 00:01:54,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-12-22 00:01:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 85 states have internal predecessors, (88), 22 states have call successors, (22), 8 states have call predecessors, (22), 13 states have return successors, (38), 21 states have call predecessors, (38), 21 states have call successors, (38) [2021-12-22 00:01:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 148 transitions. [2021-12-22 00:01:54,689 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 148 transitions. Word has length 40 [2021-12-22 00:01:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:54,690 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 148 transitions. [2021-12-22 00:01:54,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 6 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 00:01:54,690 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 148 transitions. [2021-12-22 00:01:54,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 00:01:54,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:54,699 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:54,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-22 00:01:54,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 00:01:54,901 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:54,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:54,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1870573688, now seen corresponding path program 1 times [2021-12-22 00:01:54,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:54,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225335882] [2021-12-22 00:01:54,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:54,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:54,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:54,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 00:01:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:54,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 00:01:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:54,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 00:01:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:54,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:54,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 00:01:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:54,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 00:01:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:55,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 00:01:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:55,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 00:01:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-22 00:01:55,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:55,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225335882] [2021-12-22 00:01:55,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225335882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:55,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424513741] [2021-12-22 00:01:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:55,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:55,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:55,006 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) [2021-12-22 00:01:55,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 00:01:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:55,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-22 00:01:55,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-22 00:01:55,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:56,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424513741] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:56,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:01:56,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18] total 25 [2021-12-22 00:01:56,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356951589] [2021-12-22 00:01:56,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:56,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 00:01:56,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:56,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 00:01:56,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2021-12-22 00:01:56,949 INFO L87 Difference]: Start difference. First operand 115 states and 148 transitions. Second operand has 25 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 11 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-22 00:01:58,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:58,823 INFO L93 Difference]: Finished difference Result 197 states and 248 transitions. [2021-12-22 00:01:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-22 00:01:58,824 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 11 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) Word has length 77 [2021-12-22 00:01:58,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:58,826 INFO L225 Difference]: With dead ends: 197 [2021-12-22 00:01:58,826 INFO L226 Difference]: Without dead ends: 175 [2021-12-22 00:01:58,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=491, Invalid=3415, Unknown=0, NotChecked=0, Total=3906 [2021-12-22 00:01:58,828 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 263 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:58,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 937 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1064 Invalid, 0 Unknown, 70 Unchecked, 0.6s Time] [2021-12-22 00:01:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-22 00:01:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 136. [2021-12-22 00:01:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 98 states have internal predecessors, (104), 25 states have call successors, (25), 9 states have call predecessors, (25), 14 states have return successors, (43), 28 states have call predecessors, (43), 24 states have call successors, (43) [2021-12-22 00:01:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 172 transitions. [2021-12-22 00:01:58,844 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 172 transitions. Word has length 77 [2021-12-22 00:01:58,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:58,845 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 172 transitions. [2021-12-22 00:01:58,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 11 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-22 00:01:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 172 transitions. [2021-12-22 00:01:58,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 00:01:58,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:58,848 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:58,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:59,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:59,072 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:01:59,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:59,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1737991961, now seen corresponding path program 1 times [2021-12-22 00:01:59,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:59,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110923458] [2021-12-22 00:01:59,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:59,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:59,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:59,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 00:01:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:59,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 00:01:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:59,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:01:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:59,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 00:01:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:59,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 00:01:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:59,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 00:01:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:59,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 00:01:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 00:01:59,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:59,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110923458] [2021-12-22 00:01:59,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110923458] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:59,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361338349] [2021-12-22 00:01:59,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:59,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:59,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:59,405 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) [2021-12-22 00:01:59,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 00:01:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:59,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-22 00:01:59,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:02:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 00:02:00,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:02:01,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361338349] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:02:01,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:02:01,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 29 [2021-12-22 00:02:01,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740381664] [2021-12-22 00:02:01,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:02:01,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-22 00:02:01,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:02:01,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-22 00:02:01,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2021-12-22 00:02:01,255 INFO L87 Difference]: Start difference. First operand 136 states and 172 transitions. Second operand has 30 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 25 states have internal predecessors, (59), 14 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-22 00:02:02,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:02:02,822 INFO L93 Difference]: Finished difference Result 177 states and 222 transitions. [2021-12-22 00:02:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-22 00:02:02,823 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 25 states have internal predecessors, (59), 14 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 65 [2021-12-22 00:02:02,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:02:02,824 INFO L225 Difference]: With dead ends: 177 [2021-12-22 00:02:02,824 INFO L226 Difference]: Without dead ends: 108 [2021-12-22 00:02:02,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=439, Invalid=3101, Unknown=0, NotChecked=0, Total=3540 [2021-12-22 00:02:02,825 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 217 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:02:02,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 850 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 924 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2021-12-22 00:02:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-22 00:02:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2021-12-22 00:02:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 63 states have internal predecessors, (65), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (23), 15 states have call predecessors, (23), 16 states have call successors, (23) [2021-12-22 00:02:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2021-12-22 00:02:02,830 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 65 [2021-12-22 00:02:02,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:02:02,830 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2021-12-22 00:02:02,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 25 states have internal predecessors, (59), 14 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-22 00:02:02,830 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2021-12-22 00:02:02,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 00:02:02,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:02:02,836 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:02:02,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 00:02:03,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 00:02:03,048 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-12-22 00:02:03,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:02:03,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1810378519, now seen corresponding path program 2 times [2021-12-22 00:02:03,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:02:03,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934969859] [2021-12-22 00:02:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:02:03,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:02:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:03,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:02:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:03,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 00:02:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:03,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 00:02:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:03,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 00:02:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:03,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 00:02:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:03,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 00:02:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:03,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 00:02:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:03,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 00:02:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 00:02:03,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:02:03,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934969859] [2021-12-22 00:02:03,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934969859] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:02:03,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682419914] [2021-12-22 00:02:03,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:02:03,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:02:03,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:02:03,248 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) [2021-12-22 00:02:03,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 00:02:03,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 00:02:03,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:02:03,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-22 00:02:03,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:02:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 00:02:03,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:02:05,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682419914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:02:05,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 00:02:05,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 27 [2021-12-22 00:02:05,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048238561] [2021-12-22 00:02:05,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 00:02:05,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 00:02:05,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:02:05,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 00:02:05,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2021-12-22 00:02:05,519 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand has 27 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 13 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-22 00:02:05,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:02:05,867 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-12-22 00:02:05,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 00:02:05,868 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 13 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) Word has length 65 [2021-12-22 00:02:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:02:05,868 INFO L225 Difference]: With dead ends: 30 [2021-12-22 00:02:05,868 INFO L226 Difference]: Without dead ends: 0 [2021-12-22 00:02:05,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=1402, Unknown=0, NotChecked=0, Total=1560 [2021-12-22 00:02:05,869 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:02:05,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 236 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 158 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2021-12-22 00:02:05,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-22 00:02:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-22 00:02:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-22 00:02:05,871 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2021-12-22 00:02:05,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:02:05,871 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 00:02:05,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 13 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-22 00:02:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-22 00:02:05,871 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-22 00:02:05,875 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE (12 of 13 remaining) [2021-12-22 00:02:05,875 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE (11 of 13 remaining) [2021-12-22 00:02:05,875 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (10 of 13 remaining) [2021-12-22 00:02:05,876 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2021-12-22 00:02:05,876 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATION (8 of 13 remaining) [2021-12-22 00:02:05,876 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATION (7 of 13 remaining) [2021-12-22 00:02:05,876 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATION (6 of 13 remaining) [2021-12-22 00:02:05,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATION (5 of 13 remaining) [2021-12-22 00:02:05,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATION (4 of 13 remaining) [2021-12-22 00:02:05,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATION (3 of 13 remaining) [2021-12-22 00:02:05,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATION (2 of 13 remaining) [2021-12-22 00:02:05,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATION (1 of 13 remaining) [2021-12-22 00:02:05,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2021-12-22 00:02:05,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 00:02:06,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 00:02:06,087 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:02:06,088 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 00:02:06,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 12:02:06 BoogieIcfgContainer [2021-12-22 00:02:06,090 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 00:02:06,090 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 00:02:06,090 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 00:02:06,091 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 00:02:06,091 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:01:34" (3/4) ... [2021-12-22 00:02:06,093 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-22 00:02:06,097 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-12-22 00:02:06,097 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-12-22 00:02:06,097 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-22 00:02:06,101 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2021-12-22 00:02:06,101 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-12-22 00:02:06,101 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-22 00:02:06,101 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-22 00:02:06,130 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 00:02:06,130 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 00:02:06,131 INFO L158 Benchmark]: Toolchain (without parser) took 32336.25ms. Allocated memory was 90.2MB in the beginning and 197.1MB in the end (delta: 107.0MB). Free memory was 58.8MB in the beginning and 161.4MB in the end (delta: -102.5MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. [2021-12-22 00:02:06,131 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 90.2MB. Free memory was 47.6MB in the beginning and 47.6MB in the end (delta: 45.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 00:02:06,131 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.95ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 58.6MB in the beginning and 88.6MB in the end (delta: -29.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 00:02:06,131 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.85ms. Allocated memory is still 113.2MB. Free memory was 88.6MB in the beginning and 87.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 00:02:06,132 INFO L158 Benchmark]: Boogie Preprocessor took 18.23ms. Allocated memory is still 113.2MB. Free memory was 87.1MB in the beginning and 85.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 00:02:06,132 INFO L158 Benchmark]: RCFGBuilder took 305.92ms. Allocated memory is still 113.2MB. Free memory was 85.8MB in the beginning and 73.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 00:02:06,132 INFO L158 Benchmark]: TraceAbstraction took 31684.83ms. Allocated memory was 113.2MB in the beginning and 197.1MB in the end (delta: 83.9MB). Free memory was 72.8MB in the beginning and 165.4MB in the end (delta: -92.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 00:02:06,132 INFO L158 Benchmark]: Witness Printer took 39.93ms. Allocated memory is still 197.1MB. Free memory was 165.4MB in the beginning and 161.4MB in the end (delta: 4.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 00:02:06,133 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 90.2MB. Free memory was 47.6MB in the beginning and 47.6MB in the end (delta: 45.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.95ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 58.6MB in the beginning and 88.6MB in the end (delta: -29.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.85ms. Allocated memory is still 113.2MB. Free memory was 88.6MB in the beginning and 87.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.23ms. Allocated memory is still 113.2MB. Free memory was 87.1MB in the beginning and 85.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 305.92ms. Allocated memory is still 113.2MB. Free memory was 85.8MB in the beginning and 73.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 31684.83ms. Allocated memory was 113.2MB in the beginning and 197.1MB in the end (delta: 83.9MB). Free memory was 72.8MB in the beginning and 165.4MB in the end (delta: -92.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 39.93ms. Allocated memory is still 197.1MB. Free memory was 165.4MB in the beginning and 161.4MB in the end (delta: 4.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 41]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 53 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 31.6s, OverallIterations: 18, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 8.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1776 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1761 mSDsluCounter, 5671 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 826 IncrementalHoareTripleChecker+Unchecked, 4802 mSDsCounter, 998 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5552 IncrementalHoareTripleChecker+Invalid, 7376 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 998 mSolverCounterUnsat, 869 mSDtfsCounter, 5552 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1020 GetRequests, 592 SyntacticMatches, 28 SemanticMatches, 400 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2697 ImplicationChecksByTransitivity, 16.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=136occurred in iteration=16, InterpolantAutomatonStates: 246, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 335 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 19.9s InterpolantComputationTime, 972 NumberOfCodeBlocks, 972 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1072 ConstructedInterpolants, 47 QuantifiedInterpolants, 6867 SizeOfPredicates, 92 NumberOfNonLiveVariables, 1833 ConjunctsInSsa, 241 ConjunctsInUnsatCore, 31 InterpolantComputations, 10 PerfectInterpolantSequences, 277/437 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-22 00:02:06,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE