./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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/termination-crafted/LexIndexValue-Pointer-3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:29:01,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:29:01,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:29:01,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:29:01,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:29:01,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:29:01,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:29:01,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:29:01,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:29:01,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:29:01,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:29:01,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:29:01,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:29:01,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:29:01,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:29:01,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:29:01,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:29:01,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:29:01,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:29:01,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:29:01,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:29:01,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:29:01,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:29:01,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:29:01,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:29:01,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:29:01,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:29:01,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:29:01,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:29:01,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:29:01,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:29:01,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:29:01,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:29:01,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:29:01,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:29:01,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:29:01,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:29:01,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:29:01,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:29:01,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:29:01,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:29:01,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-12-22 16:29:01,955 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:29:01,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:29:01,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:29:01,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:29:01,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:29:01,957 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:29:01,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:29:01,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:29:01,958 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:29:01,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:29:01,959 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:29:01,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:29:01,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:29:01,959 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:29:01,959 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:29:01,959 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:29:01,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:29:01,960 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:29:01,960 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:29:01,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:29:01,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:29:01,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:29:01,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:29:01,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:29:01,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:29:01,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:29:01,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:29:01,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:29:01,962 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 [2021-12-22 16:29:02,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:29:02,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:29:02,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:29:02,173 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:29:02,174 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:29:02,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2021-12-22 16:29:02,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a09d845b6/4a61bfdce3464394a1489b8090558132/FLAG66ac9dc2d [2021-12-22 16:29:02,616 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:29:02,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2021-12-22 16:29:02,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a09d845b6/4a61bfdce3464394a1489b8090558132/FLAG66ac9dc2d [2021-12-22 16:29:02,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a09d845b6/4a61bfdce3464394a1489b8090558132 [2021-12-22 16:29:02,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:29:02,639 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:29:02,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:29:02,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:29:02,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:29:02,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:29:02" (1/1) ... [2021-12-22 16:29:02,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a2a7a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:02, skipping insertion in model container [2021-12-22 16:29:02,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:29:02" (1/1) ... [2021-12-22 16:29:02,650 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:29:02,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:29:02,800 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:29:02,805 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:29:02,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:29:02,823 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:29:02,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:02 WrapperNode [2021-12-22 16:29:02,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:29:02,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:29:02,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:29:02,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:29:02,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:02" (1/1) ... [2021-12-22 16:29:02,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:02" (1/1) ... [2021-12-22 16:29:02,850 INFO L137 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2021-12-22 16:29:02,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:29:02,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:29:02,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:29:02,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:29:02,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:02" (1/1) ... [2021-12-22 16:29:02,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:02" (1/1) ... [2021-12-22 16:29:02,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:02" (1/1) ... [2021-12-22 16:29:02,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:02" (1/1) ... [2021-12-22 16:29:02,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:02" (1/1) ... [2021-12-22 16:29:02,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:02" (1/1) ... [2021-12-22 16:29:02,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:02" (1/1) ... [2021-12-22 16:29:02,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:29:02,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:29:02,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:29:02,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:29:02,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:02" (1/1) ... [2021-12-22 16:29:02,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:29:02,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:02,910 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 16:29:02,916 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 16:29:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 16:29:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 16:29:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:29:02,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:29:02,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 16:29:02,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:29:02,976 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:29:02,977 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:29:03,120 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:29:03,126 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:29:03,126 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 16:29:03,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:29:03 BoogieIcfgContainer [2021-12-22 16:29:03,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:29:03,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:29:03,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:29:03,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:29:03,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:29:02" (1/3) ... [2021-12-22 16:29:03,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669b26f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:29:03, skipping insertion in model container [2021-12-22 16:29:03,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:02" (2/3) ... [2021-12-22 16:29:03,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669b26f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:29:03, skipping insertion in model container [2021-12-22 16:29:03,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:29:03" (3/3) ... [2021-12-22 16:29:03,135 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-3.c [2021-12-22 16:29:03,140 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:29:03,140 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-12-22 16:29:03,192 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:29:03,201 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 16:29:03,201 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-12-22 16:29:03,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.894736842105263) internal successors, (36), 31 states have internal predecessors, (36), 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 16:29:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-22 16:29:03,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:03,219 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-22 16:29:03,220 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 16:29:03,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:03,225 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-12-22 16:29:03,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:03,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564953727] [2021-12-22 16:29:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:03,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:03,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:03,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564953727] [2021-12-22 16:29:03,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564953727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:03,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:03,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:29:03,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262870466] [2021-12-22 16:29:03,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:03,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:29:03,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:03,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:29:03,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:29:03,470 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.894736842105263) internal successors, (36), 31 states have internal predecessors, (36), 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 16:29:03,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:03,525 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-12-22 16:29:03,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:29:03,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) Word has length 4 [2021-12-22 16:29:03,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:03,534 INFO L225 Difference]: With dead ends: 30 [2021-12-22 16:29:03,535 INFO L226 Difference]: Without dead ends: 28 [2021-12-22 16:29:03,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:29:03,544 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:03,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:03,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-22 16:29:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-22 16:29:03,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 27 states have internal predecessors, (30), 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 16:29:03,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-12-22 16:29:03,575 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 4 [2021-12-22 16:29:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:03,575 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-12-22 16:29:03,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 16:29:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-12-22 16:29:03,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-22 16:29:03,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:03,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-22 16:29:03,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 16:29:03,577 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 16:29:03,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:03,582 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-12-22 16:29:03,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:03,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789802026] [2021-12-22 16:29:03,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:03,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:03,645 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 16:29:03,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:03,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789802026] [2021-12-22 16:29:03,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789802026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:03,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:03,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:29:03,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766208259] [2021-12-22 16:29:03,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:03,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:29:03,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:03,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:29:03,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:29:03,650 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 16:29:03,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:03,700 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-12-22 16:29:03,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:29:03,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) Word has length 4 [2021-12-22 16:29:03,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:03,703 INFO L225 Difference]: With dead ends: 32 [2021-12-22 16:29:03,703 INFO L226 Difference]: Without dead ends: 32 [2021-12-22 16:29:03,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:29:03,708 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:03,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:03,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-22 16:29:03,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-12-22 16:29:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 29 states have internal predecessors, (32), 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 16:29:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-12-22 16:29:03,719 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2021-12-22 16:29:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:03,720 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-12-22 16:29:03,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 16:29:03,720 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-12-22 16:29:03,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 16:29:03,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:03,721 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:03,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 16:29:03,722 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 16:29:03,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:03,722 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2021-12-22 16:29:03,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:03,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566713275] [2021-12-22 16:29:03,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:03,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:03,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:03,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566713275] [2021-12-22 16:29:03,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566713275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:03,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923839030] [2021-12-22 16:29:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:03,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:03,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:03,871 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 16:29:03,872 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 16:29:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:03,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 16:29:03,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:03,998 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 16:29:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:04,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:04,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923839030] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:04,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:04,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-12-22 16:29:04,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288183220] [2021-12-22 16:29:04,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:04,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 16:29:04,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:04,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 16:29:04,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:29:04,175 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 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 16:29:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:04,308 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-12-22 16:29:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:29:04,309 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 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) Word has length 8 [2021-12-22 16:29:04,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:04,310 INFO L225 Difference]: With dead ends: 39 [2021-12-22 16:29:04,310 INFO L226 Difference]: Without dead ends: 39 [2021-12-22 16:29:04,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:29:04,311 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:04,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 62 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:29:04,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-22 16:29:04,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-22 16:29:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 38 states have internal predecessors, (41), 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 16:29:04,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-12-22 16:29:04,316 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 8 [2021-12-22 16:29:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:04,317 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-12-22 16:29:04,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 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 16:29:04,317 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-12-22 16:29:04,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 16:29:04,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:04,318 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-22 16:29:04,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 16:29:04,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:04,532 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 16:29:04,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:04,532 INFO L85 PathProgramCache]: Analyzing trace with hash 519338591, now seen corresponding path program 1 times [2021-12-22 16:29:04,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:04,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587606263] [2021-12-22 16:29:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:04,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 16:29:04,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:04,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587606263] [2021-12-22 16:29:04,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587606263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:04,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:04,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:29:04,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611116437] [2021-12-22 16:29:04,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:04,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:29:04,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:04,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:29:04,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:29:04,610 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 16:29:04,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:04,642 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-12-22 16:29:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:29:04,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) Word has length 21 [2021-12-22 16:29:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:04,645 INFO L225 Difference]: With dead ends: 36 [2021-12-22 16:29:04,645 INFO L226 Difference]: Without dead ends: 36 [2021-12-22 16:29:04,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 16:29:04,651 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:04,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 15 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:04,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-22 16:29:04,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-22 16:29:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 35 states have internal predecessors, (38), 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 16:29:04,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-12-22 16:29:04,661 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 21 [2021-12-22 16:29:04,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:04,662 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-12-22 16:29:04,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 16:29:04,662 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-12-22 16:29:04,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 16:29:04,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:04,663 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-22 16:29:04,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 16:29:04,664 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 16:29:04,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:04,664 INFO L85 PathProgramCache]: Analyzing trace with hash 519338592, now seen corresponding path program 1 times [2021-12-22 16:29:04,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:04,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901365041] [2021-12-22 16:29:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:04,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:04,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:04,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901365041] [2021-12-22 16:29:04,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901365041] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:04,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235711045] [2021-12-22 16:29:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:04,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:04,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:04,739 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 16:29:04,741 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 16:29:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:04,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:29:04,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:04,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:04,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235711045] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:04,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:04,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-22 16:29:04,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978607918] [2021-12-22 16:29:04,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:04,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 16:29:04,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:04,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 16:29:04,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:29:04,899 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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 16:29:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:04,935 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-12-22 16:29:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:29:04,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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) Word has length 21 [2021-12-22 16:29:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:04,943 INFO L225 Difference]: With dead ends: 60 [2021-12-22 16:29:04,944 INFO L226 Difference]: Without dead ends: 60 [2021-12-22 16:29:04,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:29:04,945 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:04,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 88 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-22 16:29:04,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-22 16:29:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 59 states have internal predecessors, (62), 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 16:29:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-12-22 16:29:04,950 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 21 [2021-12-22 16:29:04,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:04,950 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-12-22 16:29:04,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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 16:29:04,951 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-12-22 16:29:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 16:29:04,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:04,952 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1] [2021-12-22 16:29:04,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 16:29:05,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:05,171 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 16:29:05,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:05,172 INFO L85 PathProgramCache]: Analyzing trace with hash 649821198, now seen corresponding path program 2 times [2021-12-22 16:29:05,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:05,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918715280] [2021-12-22 16:29:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:05,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:05,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:05,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918715280] [2021-12-22 16:29:05,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918715280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:05,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402434187] [2021-12-22 16:29:05,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:29:05,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:05,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:05,341 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 16:29:05,395 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 16:29:05,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:29:05,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:29:05,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 16:29:05,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:05,417 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 16:29:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 16:29:05,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:29:05,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402434187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:05,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:29:05,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2021-12-22 16:29:05,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473925156] [2021-12-22 16:29:05,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:05,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:29:05,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:05,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:29:05,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:29:05,618 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 16:29:05,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:05,652 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2021-12-22 16:29:05,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:29:05,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) Word has length 45 [2021-12-22 16:29:05,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:05,654 INFO L225 Difference]: With dead ends: 73 [2021-12-22 16:29:05,654 INFO L226 Difference]: Without dead ends: 73 [2021-12-22 16:29:05,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-12-22 16:29:05,655 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:05,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 20 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:05,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-22 16:29:05,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2021-12-22 16:29:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 66 states have internal predecessors, (71), 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 16:29:05,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-12-22 16:29:05,660 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 45 [2021-12-22 16:29:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:05,660 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-12-22 16:29:05,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 16:29:05,661 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-12-22 16:29:05,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 16:29:05,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:05,662 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:05,692 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 16:29:05,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:05,883 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 16:29:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:05,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1405678828, now seen corresponding path program 1 times [2021-12-22 16:29:05,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:05,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059420047] [2021-12-22 16:29:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:05,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:06,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:06,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059420047] [2021-12-22 16:29:06,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059420047] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:06,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968001165] [2021-12-22 16:29:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:06,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:06,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:06,023 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 16:29:06,024 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 16:29:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:06,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 16:29:06,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:06,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:06,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968001165] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:06,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:06,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-22 16:29:06,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658135387] [2021-12-22 16:29:06,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:06,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 16:29:06,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:06,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 16:29:06,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 16:29:06,446 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 25 states, 25 states have (on average 3.8) internal successors, (95), 25 states have internal predecessors, (95), 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 16:29:06,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:06,523 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2021-12-22 16:29:06,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 16:29:06,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 25 states have internal predecessors, (95), 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) Word has length 48 [2021-12-22 16:29:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:06,527 INFO L225 Difference]: With dead ends: 115 [2021-12-22 16:29:06,527 INFO L226 Difference]: Without dead ends: 115 [2021-12-22 16:29:06,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 16:29:06,528 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:06,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 82 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:29:06,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-22 16:29:06,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-12-22 16:29:06,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 114 states have internal predecessors, (119), 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 16:29:06,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2021-12-22 16:29:06,533 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 48 [2021-12-22 16:29:06,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:06,533 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2021-12-22 16:29:06,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 25 states have internal predecessors, (95), 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 16:29:06,533 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2021-12-22 16:29:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-22 16:29:06,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:06,535 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:06,553 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 16:29:06,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:06,748 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 16:29:06,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:06,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1050107376, now seen corresponding path program 2 times [2021-12-22 16:29:06,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:06,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416718435] [2021-12-22 16:29:06,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:06,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:07,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:07,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416718435] [2021-12-22 16:29:07,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416718435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:07,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448007157] [2021-12-22 16:29:07,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:29:07,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:07,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:07,031 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 16:29:07,033 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 16:29:07,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:29:07,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:29:07,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 16:29:07,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:07,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:07,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448007157] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:07,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:07,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-22 16:29:07,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112066932] [2021-12-22 16:29:07,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:07,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-22 16:29:07,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:07,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-22 16:29:07,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 16:29:07,994 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 49 states have internal predecessors, (191), 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 16:29:08,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:08,144 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2021-12-22 16:29:08,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-22 16:29:08,144 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 49 states have internal predecessors, (191), 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) Word has length 96 [2021-12-22 16:29:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:08,145 INFO L225 Difference]: With dead ends: 211 [2021-12-22 16:29:08,145 INFO L226 Difference]: Without dead ends: 211 [2021-12-22 16:29:08,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 16:29:08,146 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 207 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:08,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 124 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:29:08,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-22 16:29:08,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-12-22 16:29:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0436893203883495) internal successors, (215), 210 states have internal predecessors, (215), 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 16:29:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2021-12-22 16:29:08,170 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 96 [2021-12-22 16:29:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:08,170 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2021-12-22 16:29:08,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 49 states have internal predecessors, (191), 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 16:29:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2021-12-22 16:29:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-22 16:29:08,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:08,172 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:08,192 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 16:29:08,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:08,382 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 16:29:08,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:08,383 INFO L85 PathProgramCache]: Analyzing trace with hash -17107880, now seen corresponding path program 3 times [2021-12-22 16:29:08,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:08,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611526359] [2021-12-22 16:29:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:08,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:09,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:09,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611526359] [2021-12-22 16:29:09,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611526359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:09,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092056428] [2021-12-22 16:29:09,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 16:29:09,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:09,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:09,412 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 16:29:09,413 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 16:29:09,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 16:29:09,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:29:09,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 16:29:09,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:09,506 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 16:29:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2021-12-22 16:29:10,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2021-12-22 16:29:11,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092056428] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:11,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:11,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 5, 5] total 57 [2021-12-22 16:29:11,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402510719] [2021-12-22 16:29:11,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:11,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-22 16:29:11,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:11,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-22 16:29:11,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1202, Invalid=1990, Unknown=0, NotChecked=0, Total=3192 [2021-12-22 16:29:11,190 INFO L87 Difference]: Start difference. First operand 211 states and 215 transitions. Second operand has 57 states, 57 states have (on average 3.754385964912281) internal successors, (214), 57 states have internal predecessors, (214), 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 16:29:12,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:12,667 INFO L93 Difference]: Finished difference Result 250 states and 255 transitions. [2021-12-22 16:29:12,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-22 16:29:12,667 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.754385964912281) internal successors, (214), 57 states have internal predecessors, (214), 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) Word has length 192 [2021-12-22 16:29:12,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:12,670 INFO L225 Difference]: With dead ends: 250 [2021-12-22 16:29:12,670 INFO L226 Difference]: Without dead ends: 250 [2021-12-22 16:29:12,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3640, Invalid=8132, Unknown=0, NotChecked=0, Total=11772 [2021-12-22 16:29:12,674 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 341 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:12,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 119 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:29:12,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-22 16:29:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 228. [2021-12-22 16:29:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 225 states have (on average 1.048888888888889) internal successors, (236), 227 states have internal predecessors, (236), 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 16:29:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 236 transitions. [2021-12-22 16:29:12,681 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 236 transitions. Word has length 192 [2021-12-22 16:29:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:12,681 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 236 transitions. [2021-12-22 16:29:12,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.754385964912281) internal successors, (214), 57 states have internal predecessors, (214), 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 16:29:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 236 transitions. [2021-12-22 16:29:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-22 16:29:12,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:12,683 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:12,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 16:29:12,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:12,898 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 16:29:12,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:12,899 INFO L85 PathProgramCache]: Analyzing trace with hash 602519778, now seen corresponding path program 1 times [2021-12-22 16:29:12,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:12,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348452583] [2021-12-22 16:29:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:12,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2021-12-22 16:29:13,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:13,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348452583] [2021-12-22 16:29:13,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348452583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:13,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:13,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:29:13,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143536059] [2021-12-22 16:29:13,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:13,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:29:13,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:13,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:29:13,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:29:13,050 INFO L87 Difference]: Start difference. First operand 228 states and 236 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16:29:13,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:13,055 INFO L93 Difference]: Finished difference Result 227 states and 235 transitions. [2021-12-22 16:29:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:29:13,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) Word has length 196 [2021-12-22 16:29:13,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:13,060 INFO L225 Difference]: With dead ends: 227 [2021-12-22 16:29:13,060 INFO L226 Difference]: Without dead ends: 227 [2021-12-22 16:29:13,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:29:13,061 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:13,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:13,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-22 16:29:13,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-12-22 16:29:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.0444444444444445) internal successors, (235), 226 states have internal predecessors, (235), 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 16:29:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 235 transitions. [2021-12-22 16:29:13,076 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 235 transitions. Word has length 196 [2021-12-22 16:29:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:13,077 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 235 transitions. [2021-12-22 16:29:13,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16:29:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 235 transitions. [2021-12-22 16:29:13,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-22 16:29:13,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:13,079 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:13,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 16:29:13,079 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 16:29:13,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:13,080 INFO L85 PathProgramCache]: Analyzing trace with hash -799075579, now seen corresponding path program 1 times [2021-12-22 16:29:13,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:13,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813043972] [2021-12-22 16:29:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:13,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:14,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:14,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813043972] [2021-12-22 16:29:14,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813043972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:14,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749971814] [2021-12-22 16:29:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:14,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:14,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:14,308 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 16:29:14,309 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 16:29:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:14,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-22 16:29:14,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:14,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:16,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749971814] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:16,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:16,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2021-12-22 16:29:16,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175523417] [2021-12-22 16:29:16,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:16,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-22 16:29:16,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:16,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-22 16:29:16,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-12-22 16:29:16,619 INFO L87 Difference]: Start difference. First operand 227 states and 235 transitions. Second operand has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 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 16:29:17,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:17,035 INFO L93 Difference]: Finished difference Result 423 states and 431 transitions. [2021-12-22 16:29:17,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-22 16:29:17,036 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 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) Word has length 198 [2021-12-22 16:29:17,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:17,037 INFO L225 Difference]: With dead ends: 423 [2021-12-22 16:29:17,038 INFO L226 Difference]: Without dead ends: 423 [2021-12-22 16:29:17,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-12-22 16:29:17,040 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 288 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:17,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 211 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 16:29:17,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-12-22 16:29:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2021-12-22 16:29:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 421 states have (on average 1.0237529691211402) internal successors, (431), 422 states have internal predecessors, (431), 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 16:29:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 431 transitions. [2021-12-22 16:29:17,045 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 431 transitions. Word has length 198 [2021-12-22 16:29:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:17,045 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 431 transitions. [2021-12-22 16:29:17,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 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 16:29:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 431 transitions. [2021-12-22 16:29:17,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-12-22 16:29:17,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:17,049 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:17,067 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 16:29:17,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:17,267 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 16:29:17,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:17,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1623122088, now seen corresponding path program 2 times [2021-12-22 16:29:17,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:17,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735044508] [2021-12-22 16:29:17,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:17,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:19,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:19,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735044508] [2021-12-22 16:29:19,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735044508] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:19,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772721638] [2021-12-22 16:29:19,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:29:19,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:19,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:19,699 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 16:29:19,700 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 16:29:19,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:29:19,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:29:19,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:29:19,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2021-12-22 16:29:21,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:29:21,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772721638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:21,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:29:21,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [99] total 101 [2021-12-22 16:29:21,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26247846] [2021-12-22 16:29:21,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:21,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:29:21,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:21,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:29:21,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2021-12-22 16:29:21,659 INFO L87 Difference]: Start difference. First operand 423 states and 431 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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 16:29:21,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:21,662 INFO L93 Difference]: Finished difference Result 429 states and 437 transitions. [2021-12-22 16:29:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:29:21,662 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), 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) Word has length 394 [2021-12-22 16:29:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:21,664 INFO L225 Difference]: With dead ends: 429 [2021-12-22 16:29:21,664 INFO L226 Difference]: Without dead ends: 425 [2021-12-22 16:29:21,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2021-12-22 16:29:21,668 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:21,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2021-12-22 16:29:21,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-12-22 16:29:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2021-12-22 16:29:21,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 423 states have (on average 1.0236406619385343) internal successors, (433), 424 states have internal predecessors, (433), 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 16:29:21,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 433 transitions. [2021-12-22 16:29:21,673 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 433 transitions. Word has length 394 [2021-12-22 16:29:21,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:21,673 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 433 transitions. [2021-12-22 16:29:21,674 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), 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 16:29:21,674 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 433 transitions. [2021-12-22 16:29:21,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-12-22 16:29:21,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:21,686 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:21,720 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 16:29:21,900 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,SelfDestructingSolverStorable11 [2021-12-22 16:29:21,900 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 16:29:21,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:21,901 INFO L85 PathProgramCache]: Analyzing trace with hash -342671882, now seen corresponding path program 1 times [2021-12-22 16:29:21,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:21,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387929302] [2021-12-22 16:29:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:21,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18338 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:29:24,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:24,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387929302] [2021-12-22 16:29:24,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387929302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:24,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5861095] [2021-12-22 16:29:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:24,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:24,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:24,962 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 16:29:24,965 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 16:29:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:25,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-22 16:29:25,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18338 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:29:25,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18338 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:29:35,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5861095] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:35,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:35,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2021-12-22 16:29:35,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116058060] [2021-12-22 16:29:35,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:35,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2021-12-22 16:29:35,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:35,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2021-12-22 16:29:35,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2021-12-22 16:29:35,071 INFO L87 Difference]: Start difference. First operand 425 states and 433 transitions. Second operand has 197 states, 197 states have (on average 3.99492385786802) internal successors, (787), 197 states have internal predecessors, (787), 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 16:29:36,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:36,361 INFO L93 Difference]: Finished difference Result 817 states and 825 transitions. [2021-12-22 16:29:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-12-22 16:29:36,362 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 3.99492385786802) internal successors, (787), 197 states have internal predecessors, (787), 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) Word has length 397 [2021-12-22 16:29:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:36,365 INFO L225 Difference]: With dead ends: 817 [2021-12-22 16:29:36,365 INFO L226 Difference]: Without dead ends: 817 [2021-12-22 16:29:36,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2021-12-22 16:29:36,367 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 873 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:36,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 324 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 16:29:36,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-12-22 16:29:36,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 817. [2021-12-22 16:29:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 815 states have (on average 1.0122699386503067) internal successors, (825), 816 states have internal predecessors, (825), 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 16:29:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 825 transitions. [2021-12-22 16:29:36,378 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 825 transitions. Word has length 397 [2021-12-22 16:29:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:36,378 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 825 transitions. [2021-12-22 16:29:36,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 3.99492385786802) internal successors, (787), 197 states have internal predecessors, (787), 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 16:29:36,379 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 825 transitions. [2021-12-22 16:29:36,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2021-12-22 16:29:36,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:36,388 INFO L514 BasicCegarLoop]: trace histogram [194, 194, 194, 194, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:36,410 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 16:29:36,603 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,SelfDestructingSolverStorable12 [2021-12-22 16:29:36,604 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 16:29:36,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:36,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2100549616, now seen corresponding path program 2 times [2021-12-22 16:29:36,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:36,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694504108] [2021-12-22 16:29:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:36,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 75080 backedges. 0 proven. 75078 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:29:46,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:46,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694504108] [2021-12-22 16:29:46,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694504108] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:46,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373896774] [2021-12-22 16:29:46,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:29:46,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:46,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:46,044 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:29:46,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 16:29:46,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:29:46,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:29:46,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:29:46,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 75080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75080 trivial. 0 not checked. [2021-12-22 16:29:49,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:29:49,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373896774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:49,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:29:49,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [197] total 199 [2021-12-22 16:29:49,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008976096] [2021-12-22 16:29:49,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:49,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:29:49,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:49,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:29:49,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19310, Invalid=20092, Unknown=0, NotChecked=0, Total=39402 [2021-12-22 16:29:49,940 INFO L87 Difference]: Start difference. First operand 817 states and 825 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 16:29:49,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:49,942 INFO L93 Difference]: Finished difference Result 837 states and 851 transitions. [2021-12-22 16:29:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:29:49,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) Word has length 789 [2021-12-22 16:29:49,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:49,945 INFO L225 Difference]: With dead ends: 837 [2021-12-22 16:29:49,945 INFO L226 Difference]: Without dead ends: 833 [2021-12-22 16:29:49,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 985 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=19310, Invalid=20092, Unknown=0, NotChecked=0, Total=39402 [2021-12-22 16:29:49,947 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:49,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 30 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2021-12-22 16:29:49,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-12-22 16:29:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 828. [2021-12-22 16:29:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 826 states have (on average 1.0181598062953996) internal successors, (841), 827 states have internal predecessors, (841), 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 16:29:49,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 841 transitions. [2021-12-22 16:29:49,955 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 841 transitions. Word has length 789 [2021-12-22 16:29:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:49,955 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 841 transitions. [2021-12-22 16:29:49,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 16:29:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 841 transitions. [2021-12-22 16:29:49,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2021-12-22 16:29:49,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:49,960 INFO L514 BasicCegarLoop]: trace histogram [194, 194, 194, 194, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-22 16:29:49,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 16:29:50,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 16:29:50,177 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 16:29:50,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:50,178 INFO L85 PathProgramCache]: Analyzing trace with hash 708285286, now seen corresponding path program 4 times [2021-12-22 16:29:50,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:50,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277452204] [2021-12-22 16:29:50,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:50,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 75100 backedges. 0 proven. 75078 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 16:30:00,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:00,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277452204] [2021-12-22 16:30:00,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277452204] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:30:00,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411974036] [2021-12-22 16:30:00,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 16:30:00,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:30:00,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:30:00,911 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:30:00,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process