./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 c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/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-tmp.no-commuhash-c3fed41 [2021-12-18 20:08:31,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 20:08:31,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 20:08:31,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 20:08:31,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 20:08:31,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 20:08:31,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 20:08:31,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 20:08:31,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 20:08:31,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 20:08:31,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 20:08:31,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 20:08:31,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 20:08:31,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 20:08:31,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 20:08:31,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 20:08:31,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 20:08:31,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 20:08:31,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 20:08:31,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 20:08:31,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 20:08:31,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 20:08:31,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 20:08:31,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 20:08:31,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 20:08:31,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 20:08:31,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 20:08:31,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 20:08:31,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 20:08:31,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 20:08:31,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 20:08:31,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 20:08:31,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 20:08:31,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 20:08:31,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 20:08:31,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 20:08:31,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 20:08:31,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 20:08:31,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 20:08:31,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 20:08:31,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 20:08:31,880 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-12-18 20:08:31,930 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 20:08:31,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 20:08:31,930 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 20:08:31,931 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 20:08:31,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 20:08:31,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 20:08:31,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 20:08:31,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 20:08:31,932 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 20:08:31,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 20:08:31,933 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 20:08:31,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 20:08:31,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 20:08:31,934 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 20:08:31,934 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 20:08:31,934 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 20:08:31,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 20:08:31,934 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 20:08:31,934 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 20:08:31,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 20:08:31,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 20:08:31,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 20:08:31,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:08:31,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 20:08:31,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 20:08:31,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 20:08:31,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 20:08:31,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 20:08:31,936 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 [2021-12-18 20:08:32,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 20:08:32,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 20:08:32,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 20:08:32,261 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 20:08:32,262 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 20:08:32,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2021-12-18 20:08:32,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59510687e/f432b447104f42ffbfe44b20479dfdf3/FLAG8f7cfbfe1 [2021-12-18 20:08:32,722 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 20:08:32,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2021-12-18 20:08:32,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59510687e/f432b447104f42ffbfe44b20479dfdf3/FLAG8f7cfbfe1 [2021-12-18 20:08:33,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59510687e/f432b447104f42ffbfe44b20479dfdf3 [2021-12-18 20:08:33,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 20:08:33,169 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 20:08:33,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 20:08:33,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 20:08:33,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 20:08:33,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:08:33" (1/1) ... [2021-12-18 20:08:33,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec39a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:08:33, skipping insertion in model container [2021-12-18 20:08:33,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:08:33" (1/1) ... [2021-12-18 20:08:33,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 20:08:33,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 20:08:33,348 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:08:33,375 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 20:08:33,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:08:33,421 INFO L208 MainTranslator]: Completed translation [2021-12-18 20:08:33,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:08:33 WrapperNode [2021-12-18 20:08:33,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 20:08:33,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 20:08:33,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 20:08:33,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 20:08:33,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:08:33" (1/1) ... [2021-12-18 20:08:33,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:08:33" (1/1) ... [2021-12-18 20:08:33,471 INFO L137 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2021-12-18 20:08:33,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 20:08:33,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 20:08:33,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 20:08:33,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 20:08:33,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:08:33" (1/1) ... [2021-12-18 20:08:33,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:08:33" (1/1) ... [2021-12-18 20:08:33,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:08:33" (1/1) ... [2021-12-18 20:08:33,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:08:33" (1/1) ... [2021-12-18 20:08:33,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:08:33" (1/1) ... [2021-12-18 20:08:33,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:08:33" (1/1) ... [2021-12-18 20:08:33,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:08:33" (1/1) ... [2021-12-18 20:08:33,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 20:08:33,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 20:08:33,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 20:08:33,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 20:08:33,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:08:33" (1/1) ... [2021-12-18 20:08:33,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:08:33,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:33,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 20:08:33,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 20:08:33,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 20:08:33,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 20:08:33,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 20:08:33,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 20:08:33,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 20:08:33,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 20:08:33,695 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 20:08:33,696 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 20:08:33,844 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 20:08:33,850 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 20:08:33,862 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-18 20:08:33,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:08:33 BoogieIcfgContainer [2021-12-18 20:08:33,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 20:08:33,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 20:08:33,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 20:08:33,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 20:08:33,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 08:08:33" (1/3) ... [2021-12-18 20:08:33,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e087306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:08:33, skipping insertion in model container [2021-12-18 20:08:33,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:08:33" (2/3) ... [2021-12-18 20:08:33,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e087306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:08:33, skipping insertion in model container [2021-12-18 20:08:33,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:08:33" (3/3) ... [2021-12-18 20:08:33,894 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-3.c [2021-12-18 20:08:33,918 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 20:08:33,939 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-12-18 20:08:34,078 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 20:08:34,089 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 20:08:34,091 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-12-18 20:08:34,124 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) [2021-12-18 20:08:34,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-18 20:08:34,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:34,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-18 20:08:34,145 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-18 20:08:34,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:34,157 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-12-18 20:08:34,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:34,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350559897] [2021-12-18 20:08:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:34,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:34,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:34,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350559897] [2021-12-18 20:08:34,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350559897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:08:34,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:08:34,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:08:34,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106790083] [2021-12-18 20:08:34,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:08:34,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:08:34,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:34,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:08:34,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:08:34,475 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) [2021-12-18 20:08:34,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:34,525 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-12-18 20:08:34,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:08:34,528 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 [2021-12-18 20:08:34,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:34,532 INFO L225 Difference]: With dead ends: 30 [2021-12-18 20:08:34,533 INFO L226 Difference]: Without dead ends: 28 [2021-12-18 20:08:34,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:08:34,540 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 [2021-12-18 20:08:34,541 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] [2021-12-18 20:08:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-18 20:08:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-18 20:08:34,593 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) [2021-12-18 20:08:34,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-12-18 20:08:34,595 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 4 [2021-12-18 20:08:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:34,596 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-12-18 20:08:34,596 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) [2021-12-18 20:08:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-12-18 20:08:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-18 20:08:34,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:34,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-18 20:08:34,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 20:08:34,597 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-18 20:08:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:34,601 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-12-18 20:08:34,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:34,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584341661] [2021-12-18 20:08:34,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:34,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:34,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:34,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584341661] [2021-12-18 20:08:34,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584341661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:08:34,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:08:34,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:08:34,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239938897] [2021-12-18 20:08:34,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:08:34,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:08:34,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:34,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:08:34,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:08:34,797 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) [2021-12-18 20:08:34,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:34,863 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-12-18 20:08:34,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:08:34,864 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 [2021-12-18 20:08:34,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:34,866 INFO L225 Difference]: With dead ends: 32 [2021-12-18 20:08:34,866 INFO L226 Difference]: Without dead ends: 32 [2021-12-18 20:08:34,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:08:34,870 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 [2021-12-18 20:08:34,870 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] [2021-12-18 20:08:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-18 20:08:34,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-12-18 20:08:34,887 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) [2021-12-18 20:08:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-12-18 20:08:34,889 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2021-12-18 20:08:34,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:34,889 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-12-18 20:08:34,889 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) [2021-12-18 20:08:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-12-18 20:08:34,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 20:08:34,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:34,890 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:34,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 20:08:34,890 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-18 20:08:34,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:34,891 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2021-12-18 20:08:34,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:34,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486603987] [2021-12-18 20:08:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:34,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:34,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:34,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486603987] [2021-12-18 20:08:34,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486603987] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:34,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622080201] [2021-12-18 20:08:34,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:34,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:34,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:34,989 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:34,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 20:08:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:35,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 20:08:35,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:35,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:08:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:35,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:35,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622080201] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:35,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:35,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-12-18 20:08:35,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024586860] [2021-12-18 20:08:35,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:35,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:08:35,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:35,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:08:35,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:08:35,640 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-12-18 20:08:36,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:36,120 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2021-12-18 20:08:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:08:36,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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 [2021-12-18 20:08:36,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:36,123 INFO L225 Difference]: With dead ends: 84 [2021-12-18 20:08:36,123 INFO L226 Difference]: Without dead ends: 84 [2021-12-18 20:08:36,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:08:36,126 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:36,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 61 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:08:36,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-18 20:08:36,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 42. [2021-12-18 20:08:36,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.4375) internal successors, (46), 41 states have internal predecessors, (46), 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) [2021-12-18 20:08:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-12-18 20:08:36,136 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 8 [2021-12-18 20:08:36,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:36,137 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-12-18 20:08:36,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-12-18 20:08:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-12-18 20:08:36,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 20:08:36,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:36,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-18 20:08:36,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:36,351 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 [2021-12-18 20:08:36,352 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-18 20:08:36,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:36,352 INFO L85 PathProgramCache]: Analyzing trace with hash -4646107, now seen corresponding path program 1 times [2021-12-18 20:08:36,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:36,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004222268] [2021-12-18 20:08:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:36,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:08:36,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:36,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004222268] [2021-12-18 20:08:36,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004222268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:08:36,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:08:36,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:08:36,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222500759] [2021-12-18 20:08:36,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:08:36,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:08:36,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:36,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:08:36,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:08:36,429 INFO L87 Difference]: Start difference. First operand 42 states and 46 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) [2021-12-18 20:08:36,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:36,460 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-12-18 20:08:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:08:36,461 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 13 [2021-12-18 20:08:36,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:36,462 INFO L225 Difference]: With dead ends: 39 [2021-12-18 20:08:36,462 INFO L226 Difference]: Without dead ends: 39 [2021-12-18 20:08:36,462 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 [2021-12-18 20:08:36,467 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:36,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 16 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:08:36,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-18 20:08:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-18 20:08:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.34375) internal successors, (43), 38 states have internal predecessors, (43), 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) [2021-12-18 20:08:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-12-18 20:08:36,474 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 13 [2021-12-18 20:08:36,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:36,474 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-12-18 20:08:36,474 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) [2021-12-18 20:08:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-12-18 20:08:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 20:08:36,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:36,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-18 20:08:36,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 20:08:36,475 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-18 20:08:36,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:36,476 INFO L85 PathProgramCache]: Analyzing trace with hash -4646106, now seen corresponding path program 1 times [2021-12-18 20:08:36,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:36,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771811026] [2021-12-18 20:08:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:36,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:36,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:36,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771811026] [2021-12-18 20:08:36,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771811026] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:36,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297542157] [2021-12-18 20:08:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:36,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:36,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:36,525 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:36,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 20:08:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:36,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 20:08:36,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:36,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:36,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297542157] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:36,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:36,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-18 20:08:36,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479547180] [2021-12-18 20:08:36,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:36,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 20:08:36,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:36,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 20:08:36,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:08:36,870 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2021-12-18 20:08:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:36,986 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-12-18 20:08:36,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 20:08:36,988 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 13 [2021-12-18 20:08:36,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:36,989 INFO L225 Difference]: With dead ends: 47 [2021-12-18 20:08:36,990 INFO L226 Difference]: Without dead ends: 47 [2021-12-18 20:08:36,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:08:36,991 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:36,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 109 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:08:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-18 20:08:36,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-18 20:08:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 45 states have internal predecessors, (49), 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) [2021-12-18 20:08:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-12-18 20:08:36,996 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 13 [2021-12-18 20:08:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:36,996 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-12-18 20:08:36,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2021-12-18 20:08:36,996 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-12-18 20:08:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 20:08:36,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:36,997 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2021-12-18 20:08:37,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:37,211 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 [2021-12-18 20:08:37,211 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-18 20:08:37,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:37,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2021-12-18 20:08:37,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:37,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574889599] [2021-12-18 20:08:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:37,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:37,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:37,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574889599] [2021-12-18 20:08:37,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574889599] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:37,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414728450] [2021-12-18 20:08:37,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:08:37,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:37,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:37,562 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:37,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 20:08:37,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:08:37,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:37,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 20:08:37,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:37,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:08:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:38,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:08:38,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414728450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:08:38,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:08:38,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2021-12-18 20:08:38,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138164755] [2021-12-18 20:08:38,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:08:38,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:08:38,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:38,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:08:38,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:08:38,191 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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) [2021-12-18 20:08:38,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:38,286 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-12-18 20:08:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 20:08:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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 20 [2021-12-18 20:08:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:38,288 INFO L225 Difference]: With dead ends: 44 [2021-12-18 20:08:38,288 INFO L226 Difference]: Without dead ends: 44 [2021-12-18 20:08:38,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:08:38,288 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:38,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 25 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:08:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-18 20:08:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-18 20:08:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 43 states have internal predecessors, (46), 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) [2021-12-18 20:08:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-12-18 20:08:38,292 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 20 [2021-12-18 20:08:38,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:38,292 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-12-18 20:08:38,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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) [2021-12-18 20:08:38,292 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-12-18 20:08:38,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 20:08:38,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:38,293 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1] [2021-12-18 20:08:38,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:38,503 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 [2021-12-18 20:08:38,503 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-18 20:08:38,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:38,504 INFO L85 PathProgramCache]: Analyzing trace with hash -807272550, now seen corresponding path program 2 times [2021-12-18 20:08:38,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:38,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465179412] [2021-12-18 20:08:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:38,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:38,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:38,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465179412] [2021-12-18 20:08:38,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465179412] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:38,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255112460] [2021-12-18 20:08:38,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:08:38,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:38,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:38,666 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:38,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 20:08:38,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-18 20:08:38,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 20:08:38,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:38,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:08:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 20:08:39,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:08:39,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255112460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:08:39,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:08:39,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2021-12-18 20:08:39,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136557184] [2021-12-18 20:08:39,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:08:39,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:08:39,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:39,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:08:39,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:08:39,276 INFO L87 Difference]: Start difference. First operand 44 states and 46 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) [2021-12-18 20:08:39,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:39,358 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-12-18 20:08:39,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:08:39,359 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 29 [2021-12-18 20:08:39,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:39,359 INFO L225 Difference]: With dead ends: 57 [2021-12-18 20:08:39,359 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 20:08:39,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:08:39,360 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:39,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 20 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:08:39,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 20:08:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2021-12-18 20:08:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 50 states have internal predecessors, (55), 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) [2021-12-18 20:08:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-12-18 20:08:39,363 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 29 [2021-12-18 20:08:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:39,363 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-12-18 20:08:39,363 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) [2021-12-18 20:08:39,363 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-12-18 20:08:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 20:08:39,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:39,363 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:39,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:39,575 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 [2021-12-18 20:08:39,575 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-18 20:08:39,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:39,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674464, now seen corresponding path program 1 times [2021-12-18 20:08:39,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:39,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039139436] [2021-12-18 20:08:39,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:39,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:39,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:39,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039139436] [2021-12-18 20:08:39,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039139436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:39,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507286271] [2021-12-18 20:08:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:39,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:39,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:39,943 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:39,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 20:08:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:39,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 20:08:39,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:40,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:40,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507286271] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:40,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:40,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-18 20:08:40,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145750773] [2021-12-18 20:08:40,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:40,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 20:08:40,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:40,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 20:08:40,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-18 20:08:40,241 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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) [2021-12-18 20:08:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:40,322 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2021-12-18 20:08:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 20:08:40,324 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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 32 [2021-12-18 20:08:40,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:40,325 INFO L225 Difference]: With dead ends: 83 [2021-12-18 20:08:40,327 INFO L226 Difference]: Without dead ends: 83 [2021-12-18 20:08:40,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-18 20:08:40,328 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:40,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 92 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:08:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-18 20:08:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-18 20:08:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 82 states have internal predecessors, (87), 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) [2021-12-18 20:08:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2021-12-18 20:08:40,338 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 32 [2021-12-18 20:08:40,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:40,338 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2021-12-18 20:08:40,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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) [2021-12-18 20:08:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2021-12-18 20:08:40,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-18 20:08:40,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:40,342 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:40,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:40,564 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 [2021-12-18 20:08:40,564 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-18 20:08:40,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:40,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1299913720, now seen corresponding path program 2 times [2021-12-18 20:08:40,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:40,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307236130] [2021-12-18 20:08:40,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:40,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:40,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:40,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307236130] [2021-12-18 20:08:40,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307236130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:40,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69455548] [2021-12-18 20:08:40,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:08:40,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:40,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:40,966 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:40,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 20:08:41,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:08:41,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:41,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 20:08:41,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:41,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:41,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69455548] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:41,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:41,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2021-12-18 20:08:41,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426955269] [2021-12-18 20:08:41,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:41,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 20:08:41,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:41,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 20:08:41,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 20:08:41,777 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 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) [2021-12-18 20:08:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:41,863 INFO L93 Difference]: Finished difference Result 147 states and 151 transitions. [2021-12-18 20:08:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 20:08:41,864 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 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 64 [2021-12-18 20:08:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:41,864 INFO L225 Difference]: With dead ends: 147 [2021-12-18 20:08:41,864 INFO L226 Difference]: Without dead ends: 147 [2021-12-18 20:08:41,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 20:08:41,865 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 135 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:41,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 89 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:08:41,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-18 20:08:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-12-18 20:08:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0633802816901408) internal successors, (151), 146 states have internal predecessors, (151), 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) [2021-12-18 20:08:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2021-12-18 20:08:41,870 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 64 [2021-12-18 20:08:41,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:41,870 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2021-12-18 20:08:41,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 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) [2021-12-18 20:08:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2021-12-18 20:08:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-18 20:08:41,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:41,872 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:41,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-18 20:08:42,088 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 [2021-12-18 20:08:42,090 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-18 20:08:42,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:42,091 INFO L85 PathProgramCache]: Analyzing trace with hash -101201880, now seen corresponding path program 3 times [2021-12-18 20:08:42,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:42,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47108217] [2021-12-18 20:08:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:42,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:42,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:42,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47108217] [2021-12-18 20:08:42,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47108217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:42,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937118318] [2021-12-18 20:08:42,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:08:42,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:42,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:42,816 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:42,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 20:08:42,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-18 20:08:42,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:42,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 20:08:42,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:42,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:08:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2021-12-18 20:08:43,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2021-12-18 20:08:44,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937118318] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:44,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:44,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 5, 5] total 41 [2021-12-18 20:08:44,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496272052] [2021-12-18 20:08:44,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:44,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 20:08:44,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:44,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 20:08:44,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=1086, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 20:08:44,661 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand has 41 states, 41 states have (on average 3.658536585365854) internal successors, (150), 41 states have internal predecessors, (150), 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) [2021-12-18 20:08:45,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:45,575 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2021-12-18 20:08:45,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 20:08:45,576 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.658536585365854) internal successors, (150), 41 states have internal predecessors, (150), 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 128 [2021-12-18 20:08:45,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:45,576 INFO L225 Difference]: With dead ends: 186 [2021-12-18 20:08:45,576 INFO L226 Difference]: Without dead ends: 186 [2021-12-18 20:08:45,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1680, Invalid=4172, Unknown=0, NotChecked=0, Total=5852 [2021-12-18 20:08:45,578 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 264 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:45,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 110 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:08:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-18 20:08:45,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 164. [2021-12-18 20:08:45,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 161 states have (on average 1.0683229813664596) internal successors, (172), 163 states have internal predecessors, (172), 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) [2021-12-18 20:08:45,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 172 transitions. [2021-12-18 20:08:45,592 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 172 transitions. Word has length 128 [2021-12-18 20:08:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:45,593 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 172 transitions. [2021-12-18 20:08:45,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.658536585365854) internal successors, (150), 41 states have internal predecessors, (150), 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) [2021-12-18 20:08:45,603 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 172 transitions. [2021-12-18 20:08:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-18 20:08:45,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:45,605 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:45,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:45,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:45,820 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-18 20:08:45,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:45,821 INFO L85 PathProgramCache]: Analyzing trace with hash -373807950, now seen corresponding path program 1 times [2021-12-18 20:08:45,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:45,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279298194] [2021-12-18 20:08:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:45,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1891 trivial. 0 not checked. [2021-12-18 20:08:45,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:45,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279298194] [2021-12-18 20:08:45,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279298194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:08:45,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:08:45,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:08:45,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276489652] [2021-12-18 20:08:45,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:08:45,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:08:45,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:45,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:08:45,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:08:45,990 INFO L87 Difference]: Start difference. First operand 164 states and 172 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) [2021-12-18 20:08:45,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:45,996 INFO L93 Difference]: Finished difference Result 163 states and 171 transitions. [2021-12-18 20:08:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:08:45,997 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 132 [2021-12-18 20:08:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:45,999 INFO L225 Difference]: With dead ends: 163 [2021-12-18 20:08:45,999 INFO L226 Difference]: Without dead ends: 163 [2021-12-18 20:08:45,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:08:46,000 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 [2021-12-18 20:08:46,001 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] [2021-12-18 20:08:46,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-18 20:08:46,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-12-18 20:08:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 161 states have (on average 1.062111801242236) internal successors, (171), 162 states have internal predecessors, (171), 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) [2021-12-18 20:08:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 171 transitions. [2021-12-18 20:08:46,024 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 171 transitions. Word has length 132 [2021-12-18 20:08:46,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:46,025 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 171 transitions. [2021-12-18 20:08:46,025 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) [2021-12-18 20:08:46,025 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 171 transitions. [2021-12-18 20:08:46,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-18 20:08:46,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:46,027 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:46,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 20:08:46,028 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)] === [2021-12-18 20:08:46,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:46,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1547815637, now seen corresponding path program 1 times [2021-12-18 20:08:46,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:46,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833393121] [2021-12-18 20:08:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:46,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:46,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:46,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833393121] [2021-12-18 20:08:46,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833393121] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:46,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842901091] [2021-12-18 20:08:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:46,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:46,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:46,575 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:46,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 20:08:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:46,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 20:08:46,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:46,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:48,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842901091] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:48,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:48,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2021-12-18 20:08:48,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129453538] [2021-12-18 20:08:48,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:48,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-18 20:08:48,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:48,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-18 20:08:48,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 20:08:48,785 INFO L87 Difference]: Start difference. First operand 163 states and 171 transitions. Second operand has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 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) [2021-12-18 20:08:49,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:49,171 INFO L93 Difference]: Finished difference Result 295 states and 303 transitions. [2021-12-18 20:08:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-18 20:08:49,172 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 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 134 [2021-12-18 20:08:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:49,175 INFO L225 Difference]: With dead ends: 295 [2021-12-18 20:08:49,175 INFO L226 Difference]: Without dead ends: 295 [2021-12-18 20:08:49,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 20:08:49,179 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 192 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:49,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 195 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:08:49,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-18 20:08:49,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2021-12-18 20:08:49,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 293 states have (on average 1.0341296928327646) internal successors, (303), 294 states have internal predecessors, (303), 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) [2021-12-18 20:08:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 303 transitions. [2021-12-18 20:08:49,200 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 303 transitions. Word has length 134 [2021-12-18 20:08:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:49,200 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 303 transitions. [2021-12-18 20:08:49,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 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) [2021-12-18 20:08:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 303 transitions. [2021-12-18 20:08:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-12-18 20:08:49,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:49,206 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:49,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:49,429 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 [2021-12-18 20:08:49,430 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)] === [2021-12-18 20:08:49,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:49,430 INFO L85 PathProgramCache]: Analyzing trace with hash 965033720, now seen corresponding path program 2 times [2021-12-18 20:08:49,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:49,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517873105] [2021-12-18 20:08:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:49,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:51,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:51,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517873105] [2021-12-18 20:08:51,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517873105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:51,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226131042] [2021-12-18 20:08:51,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:08:51,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:51,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:51,800 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:51,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 20:08:51,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-18 20:08:51,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:51,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 20:08:51,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2021-12-18 20:08:53,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:08:53,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226131042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:08:53,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:08:53,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [67] total 69 [2021-12-18 20:08:53,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752509916] [2021-12-18 20:08:53,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:08:53,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:08:53,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:53,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:08:53,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 20:08:53,621 INFO L87 Difference]: Start difference. First operand 295 states and 303 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) [2021-12-18 20:08:53,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:53,627 INFO L93 Difference]: Finished difference Result 301 states and 309 transitions. [2021-12-18 20:08:53,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:08:53,628 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 266 [2021-12-18 20:08:53,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:53,630 INFO L225 Difference]: With dead ends: 301 [2021-12-18 20:08:53,630 INFO L226 Difference]: Without dead ends: 297 [2021-12-18 20:08:53,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 20:08:53,634 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 [2021-12-18 20:08:53,635 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] [2021-12-18 20:08:53,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-18 20:08:53,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2021-12-18 20:08:53,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 295 states have (on average 1.0338983050847457) internal successors, (305), 296 states have internal predecessors, (305), 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) [2021-12-18 20:08:53,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 305 transitions. [2021-12-18 20:08:53,643 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 305 transitions. Word has length 266 [2021-12-18 20:08:53,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:53,644 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 305 transitions. [2021-12-18 20:08:53,644 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) [2021-12-18 20:08:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 305 transitions. [2021-12-18 20:08:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-12-18 20:08:53,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:53,646 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:53,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:53,846 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 [2021-12-18 20:08:53,847 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)] === [2021-12-18 20:08:53,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:53,847 INFO L85 PathProgramCache]: Analyzing trace with hash 154106454, now seen corresponding path program 1 times [2021-12-18 20:08:53,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:53,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595106578] [2021-12-18 20:08:53,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:53,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8130 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:08:55,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:55,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595106578] [2021-12-18 20:08:55,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595106578] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:55,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633507411] [2021-12-18 20:08:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:55,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:55,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:55,942 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:55,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 20:08:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:56,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-18 20:08:56,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8130 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:08:56,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8130 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:09:02,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633507411] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:02,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:09:02,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2021-12-18 20:09:02,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031707234] [2021-12-18 20:09:02,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:02,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2021-12-18 20:09:02,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:02,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-12-18 20:09:02,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2021-12-18 20:09:02,147 INFO L87 Difference]: Start difference. First operand 297 states and 305 transitions. Second operand has 133 states, 133 states have (on average 3.992481203007519) internal successors, (531), 133 states have internal predecessors, (531), 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) [2021-12-18 20:09:02,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:02,837 INFO L93 Difference]: Finished difference Result 561 states and 569 transitions. [2021-12-18 20:09:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-12-18 20:09:02,838 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.992481203007519) internal successors, (531), 133 states have internal predecessors, (531), 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 269 [2021-12-18 20:09:02,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:02,840 INFO L225 Difference]: With dead ends: 561 [2021-12-18 20:09:02,840 INFO L226 Difference]: Without dead ends: 561 [2021-12-18 20:09:02,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2021-12-18 20:09:02,843 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 390 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:02,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 309 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:09:02,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-12-18 20:09:02,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-12-18 20:09:02,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 559 states have (on average 1.0178890876565294) internal successors, (569), 560 states have internal predecessors, (569), 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) [2021-12-18 20:09:02,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 569 transitions. [2021-12-18 20:09:02,855 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 569 transitions. Word has length 269 [2021-12-18 20:09:02,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:02,855 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 569 transitions. [2021-12-18 20:09:02,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.992481203007519) internal successors, (531), 133 states have internal predecessors, (531), 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) [2021-12-18 20:09:02,856 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 569 transitions. [2021-12-18 20:09:02,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2021-12-18 20:09:02,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:02,861 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:02,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 20:09:03,078 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 [2021-12-18 20:09:03,079 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-18 20:09:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:03,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1923211472, now seen corresponding path program 2 times [2021-12-18 20:09:03,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:03,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069789897] [2021-12-18 20:09:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:03,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 33672 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:09:09,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:09,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069789897] [2021-12-18 20:09:09,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069789897] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:09,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813610144] [2021-12-18 20:09:09,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:09:09,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:09,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:09,413 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:09:09,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 20:09:09,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-18 20:09:09,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:09:09,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 20:09:09,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 33672 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33672 trivial. 0 not checked. [2021-12-18 20:09:12,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:09:12,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813610144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:09:12,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:09:12,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [133] total 135 [2021-12-18 20:09:12,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085759420] [2021-12-18 20:09:12,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:09:12,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:09:12,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:12,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:09:12,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8782, Invalid=9308, Unknown=0, NotChecked=0, Total=18090 [2021-12-18 20:09:12,386 INFO L87 Difference]: Start difference. First operand 561 states and 569 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) [2021-12-18 20:09:12,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:12,390 INFO L93 Difference]: Finished difference Result 581 states and 595 transitions. [2021-12-18 20:09:12,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:09:12,391 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 533 [2021-12-18 20:09:12,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:12,392 INFO L225 Difference]: With dead ends: 581 [2021-12-18 20:09:12,392 INFO L226 Difference]: Without dead ends: 577 [2021-12-18 20:09:12,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=8782, Invalid=9308, Unknown=0, NotChecked=0, Total=18090 [2021-12-18 20:09:12,396 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 [2021-12-18 20:09:12,397 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] [2021-12-18 20:09:12,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-12-18 20:09:12,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 572. [2021-12-18 20:09:12,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 570 states have (on average 1.0263157894736843) internal successors, (585), 571 states have internal predecessors, (585), 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) [2021-12-18 20:09:12,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 585 transitions. [2021-12-18 20:09:12,423 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 585 transitions. Word has length 533 [2021-12-18 20:09:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:12,424 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 585 transitions. [2021-12-18 20:09:12,424 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) [2021-12-18 20:09:12,424 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 585 transitions. [2021-12-18 20:09:12,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2021-12-18 20:09:12,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:12,429 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-18 20:09:12,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 20:09:12,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-18 20:09:12,648 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-18 20:09:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:12,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1392700454, now seen corresponding path program 4 times [2021-12-18 20:09:12,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:12,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068472803] [2021-12-18 20:09:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:12,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 33692 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:09:19,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:19,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068472803] [2021-12-18 20:09:19,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068472803] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:19,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928938178] [2021-12-18 20:09:19,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:09:19,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:19,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:19,580 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:09:19,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 20:20:30,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:20:30,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:20:30,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 1918 conjuncts, 132 conjunts are in the unsatisfiable core [2021-12-18 20:20:30,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:20:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 33692 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:20:31,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:20:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 33692 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:20:43,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928938178] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:20:43,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:20:43,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133, 133] total 265 [2021-12-18 20:20:43,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322375378] [2021-12-18 20:20:43,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:20:43,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 265 states [2021-12-18 20:20:43,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:20:43,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 265 interpolants. [2021-12-18 20:20:43,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34980, Invalid=34980, Unknown=0, NotChecked=0, Total=69960 [2021-12-18 20:20:43,878 INFO L87 Difference]: Start difference. First operand 572 states and 585 transitions. Second operand has 265 states, 265 states have (on average 3.981132075471698) internal successors, (1055), 265 states have internal predecessors, (1055), 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) [2021-12-18 20:20:46,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:20:46,026 INFO L93 Difference]: Finished difference Result 1100 states and 1113 transitions. [2021-12-18 20:20:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2021-12-18 20:20:46,027 INFO L78 Accepts]: Start accepts. Automaton has has 265 states, 265 states have (on average 3.981132075471698) internal successors, (1055), 265 states have internal predecessors, (1055), 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 537 [2021-12-18 20:20:46,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:20:46,030 INFO L225 Difference]: With dead ends: 1100 [2021-12-18 20:20:46,030 INFO L226 Difference]: Without dead ends: 1100 [2021-12-18 20:20:46,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1205 GetRequests, 942 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=34980, Invalid=34980, Unknown=0, NotChecked=0, Total=69960 [2021-12-18 20:20:46,033 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 786 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:20:46,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 409 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 20:20:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-12-18 20:20:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1100. [2021-12-18 20:20:46,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1098 states have (on average 1.0136612021857923) internal successors, (1113), 1099 states have internal predecessors, (1113), 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) [2021-12-18 20:20:46,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1113 transitions. [2021-12-18 20:20:46,043 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1113 transitions. Word has length 537 [2021-12-18 20:20:46,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:20:46,043 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 1113 transitions. [2021-12-18 20:20:46,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 265 states, 265 states have (on average 3.981132075471698) internal successors, (1055), 265 states have internal predecessors, (1055), 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) [2021-12-18 20:20:46,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1113 transitions. [2021-12-18 20:20:46,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1066 [2021-12-18 20:20:46,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:20:46,051 INFO L514 BasicCegarLoop]: trace histogram [262, 262, 262, 262, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-18 20:20:46,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 20:20:46,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-18 20:20:46,259 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-18 20:20:46,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:20:46,260 INFO L85 PathProgramCache]: Analyzing trace with hash 8130842, now seen corresponding path program 5 times [2021-12-18 20:20:46,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:20:46,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342457318] [2021-12-18 20:20:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:20:46,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:20:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:21:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 137048 backedges. 0 proven. 137026 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:21:04,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:21:04,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342457318] [2021-12-18 20:21:04,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342457318] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:21:04,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042153771] [2021-12-18 20:21:04,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:21:04,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:21:04,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:21:04,818 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:21:04,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process Killed by 15