./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:40:41,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:40:41,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:40:41,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:40:41,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:40:41,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:40:41,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:40:41,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:40:41,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:40:41,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:40:41,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:40:41,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:40:41,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:40:41,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:40:41,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:40:41,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:40:41,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:40:41,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:40:41,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:40:41,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:40:41,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:40:41,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:40:41,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:40:41,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:40:41,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:40:41,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:40:41,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:40:41,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:40:41,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:40:41,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:40:41,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:40:41,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:40:41,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:40:41,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:40:41,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:40:41,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:40:41,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:40:41,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:40:41,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:40:41,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:40:41,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:40:41,103 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:40:41,123 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:40:41,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:40:41,123 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:40:41,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:40:41,124 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:40:41,124 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:40:41,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:40:41,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:40:41,125 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:40:41,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:40:41,126 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:40:41,126 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:40:41,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:40:41,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:40:41,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:40:41,127 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:40:41,127 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:40:41,127 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:40:41,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:40:41,127 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:40:41,127 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:40:41,128 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:40:41,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:40:41,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:40:41,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:40:41,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:40:41,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:40:41,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:40:41,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:40:41,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:40:41,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:40:41,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 [2021-12-14 19:40:41,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:40:41,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:40:41,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:40:41,342 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:40:41,343 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:40:41,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2021-12-14 19:40:41,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/738c63ae5/19a26165e3d542418b345f56e2fc3dcf/FLAG820d28c6d [2021-12-14 19:40:41,692 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:40:41,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2021-12-14 19:40:41,699 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/738c63ae5/19a26165e3d542418b345f56e2fc3dcf/FLAG820d28c6d [2021-12-14 19:40:42,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/738c63ae5/19a26165e3d542418b345f56e2fc3dcf [2021-12-14 19:40:42,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:40:42,125 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:40:42,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:40:42,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:40:42,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:40:42,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:40:42" (1/1) ... [2021-12-14 19:40:42,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@328c673d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:42, skipping insertion in model container [2021-12-14 19:40:42,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:40:42" (1/1) ... [2021-12-14 19:40:42,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:40:42,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:40:42,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:40:42,273 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:40:42,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:40:42,301 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:40:42,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:42 WrapperNode [2021-12-14 19:40:42,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:40:42,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:40:42,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:40:42,306 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:40:42,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:42" (1/1) ... [2021-12-14 19:40:42,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:42" (1/1) ... [2021-12-14 19:40:42,336 INFO L137 Inliner]: procedures = 9, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2021-12-14 19:40:42,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:40:42,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:40:42,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:40:42,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:40:42,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:42" (1/1) ... [2021-12-14 19:40:42,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:42" (1/1) ... [2021-12-14 19:40:42,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:42" (1/1) ... [2021-12-14 19:40:42,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:42" (1/1) ... [2021-12-14 19:40:42,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:42" (1/1) ... [2021-12-14 19:40:42,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:42" (1/1) ... [2021-12-14 19:40:42,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:42" (1/1) ... [2021-12-14 19:40:42,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:40:42,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:40:42,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:40:42,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:40:42,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:42" (1/1) ... [2021-12-14 19:40:42,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:40:42,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:40:42,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 19:40:42,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 19:40:42,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 19:40:42,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:40:42,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:40:42,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 19:40:42,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 19:40:42,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:40:42,498 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:40:42,499 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:40:42,625 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:40:42,631 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:40:42,631 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-14 19:40:42,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:40:42 BoogieIcfgContainer [2021-12-14 19:40:42,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:40:42,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:40:42,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:40:42,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:40:42,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:40:42" (1/3) ... [2021-12-14 19:40:42,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6745288c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:40:42, skipping insertion in model container [2021-12-14 19:40:42,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:40:42" (2/3) ... [2021-12-14 19:40:42,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6745288c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:40:42, skipping insertion in model container [2021-12-14 19:40:42,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:40:42" (3/3) ... [2021-12-14 19:40:42,642 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2.c [2021-12-14 19:40:42,646 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:40:42,647 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-12-14 19:40:42,695 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:40:42,700 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 19:40:42,700 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-12-14 19:40:42,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 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) [2021-12-14 19:40:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-14 19:40:42,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:42,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-14 19:40:42,764 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:42,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:42,774 INFO L85 PathProgramCache]: Analyzing trace with hash 28698921, now seen corresponding path program 1 times [2021-12-14 19:40:42,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:42,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927111362] [2021-12-14 19:40:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:42,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:42,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:42,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927111362] [2021-12-14 19:40:42,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927111362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:42,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:42,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:40:42,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344696970] [2021-12-14 19:40:42,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:42,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:40:42,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:43,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:40:43,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:40:43,030 INFO L87 Difference]: Start difference. First operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 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) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-12-14 19:40:43,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:43,119 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-12-14 19:40:43,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:40:43,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2021-12-14 19:40:43,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:43,130 INFO L225 Difference]: With dead ends: 69 [2021-12-14 19:40:43,131 INFO L226 Difference]: Without dead ends: 65 [2021-12-14 19:40:43,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:40:43,136 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 69 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:43,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 84 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:40:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-14 19:40:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2021-12-14 19:40:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.5357142857142858) 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) [2021-12-14 19:40:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-12-14 19:40:43,160 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 5 [2021-12-14 19:40:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:43,160 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-12-14 19:40:43,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-12-14 19:40:43,161 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-12-14 19:40:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 19:40:43,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:43,162 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:43,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 19:40:43,162 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:43,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:43,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1809811544, now seen corresponding path program 1 times [2021-12-14 19:40:43,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:43,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933042377] [2021-12-14 19:40:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:43,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:43,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:43,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933042377] [2021-12-14 19:40:43,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933042377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:43,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:43,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:40:43,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849346519] [2021-12-14 19:40:43,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:43,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:40:43,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:43,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:40:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:40:43,218 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-12-14 19:40:43,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:43,280 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-12-14 19:40:43,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:40:43,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 7 [2021-12-14 19:40:43,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:43,282 INFO L225 Difference]: With dead ends: 70 [2021-12-14 19:40:43,282 INFO L226 Difference]: Without dead ends: 70 [2021-12-14 19:40:43,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:40:43,283 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 81 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:43,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 116 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:40:43,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-14 19:40:43,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2021-12-14 19:40:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5) internal successors, (45), 40 states have internal predecessors, (45), 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) [2021-12-14 19:40:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-12-14 19:40:43,288 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 7 [2021-12-14 19:40:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:43,289 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-12-14 19:40:43,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-12-14 19:40:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-12-14 19:40:43,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:40:43,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:43,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:43,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 19:40:43,290 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:43,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:43,291 INFO L85 PathProgramCache]: Analyzing trace with hash -489510905, now seen corresponding path program 1 times [2021-12-14 19:40:43,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:43,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49897131] [2021-12-14 19:40:43,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:43,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:43,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:43,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49897131] [2021-12-14 19:40:43,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49897131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:43,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:43,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:40:43,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352397377] [2021-12-14 19:40:43,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:43,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:40:43,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:43,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:40:43,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:40:43,335 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-12-14 19:40:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:43,366 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-12-14 19:40:43,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:40:43,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 11 [2021-12-14 19:40:43,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:43,368 INFO L225 Difference]: With dead ends: 75 [2021-12-14 19:40:43,368 INFO L226 Difference]: Without dead ends: 75 [2021-12-14 19:40:43,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:40:43,370 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 61 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:43,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 152 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:40:43,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-14 19:40:43,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2021-12-14 19:40:43,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 44 states have internal predecessors, (50), 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) [2021-12-14 19:40:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-12-14 19:40:43,376 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 11 [2021-12-14 19:40:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:43,377 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-12-14 19:40:43,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-12-14 19:40:43,377 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-12-14 19:40:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:40:43,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:43,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:43,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 19:40:43,378 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:43,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:43,379 INFO L85 PathProgramCache]: Analyzing trace with hash -489508983, now seen corresponding path program 1 times [2021-12-14 19:40:43,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:43,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668143764] [2021-12-14 19:40:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:43,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:43,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:43,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668143764] [2021-12-14 19:40:43,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668143764] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:43,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:43,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:40:43,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536030030] [2021-12-14 19:40:43,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:43,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:40:43,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:43,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:40:43,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:40:43,450 INFO L87 Difference]: Start difference. First operand 45 states and 50 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) [2021-12-14 19:40:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:43,478 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-12-14 19:40:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:40:43,478 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 11 [2021-12-14 19:40:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:43,479 INFO L225 Difference]: With dead ends: 43 [2021-12-14 19:40:43,479 INFO L226 Difference]: Without dead ends: 43 [2021-12-14 19:40:43,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:40:43,481 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:43,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 31 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:40:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-14 19:40:43,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-14 19:40:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.411764705882353) internal successors, (48), 42 states have internal predecessors, (48), 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) [2021-12-14 19:40:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-12-14 19:40:43,485 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 11 [2021-12-14 19:40:43,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:43,485 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-12-14 19:40:43,485 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) [2021-12-14 19:40:43,485 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-12-14 19:40:43,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:40:43,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:43,486 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:43,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 19:40:43,486 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:43,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:43,487 INFO L85 PathProgramCache]: Analyzing trace with hash -489508982, now seen corresponding path program 1 times [2021-12-14 19:40:43,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:43,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742356279] [2021-12-14 19:40:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:43,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:43,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:43,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742356279] [2021-12-14 19:40:43,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742356279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:43,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:43,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:40:43,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156059012] [2021-12-14 19:40:43,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:43,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:40:43,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:43,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:40:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:40:43,573 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2021-12-14 19:40:43,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:43,617 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-12-14 19:40:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:40:43,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 11 [2021-12-14 19:40:43,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:43,618 INFO L225 Difference]: With dead ends: 50 [2021-12-14 19:40:43,618 INFO L226 Difference]: Without dead ends: 50 [2021-12-14 19:40:43,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:40:43,619 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:43,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:40:43,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-14 19:40:43,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-12-14 19:40:43,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 states have internal predecessors, (53), 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) [2021-12-14 19:40:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-12-14 19:40:43,622 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 11 [2021-12-14 19:40:43,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:43,623 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-12-14 19:40:43,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2021-12-14 19:40:43,623 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-12-14 19:40:43,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 19:40:43,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:43,624 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:43,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 19:40:43,624 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839934, now seen corresponding path program 1 times [2021-12-14 19:40:43,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:43,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042540572] [2021-12-14 19:40:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:43,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:43,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:43,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042540572] [2021-12-14 19:40:43,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042540572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:43,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:43,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:40:43,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353875983] [2021-12-14 19:40:43,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:43,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:40:43,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:43,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:40:43,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:40:43,660 INFO L87 Difference]: Start difference. First operand 48 states and 53 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) [2021-12-14 19:40:43,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:43,688 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-12-14 19:40:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:40:43,688 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 16 [2021-12-14 19:40:43,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:43,689 INFO L225 Difference]: With dead ends: 47 [2021-12-14 19:40:43,689 INFO L226 Difference]: Without dead ends: 47 [2021-12-14 19:40:43,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:40:43,690 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:43,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:40:43,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-14 19:40:43,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-14 19:40:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 46 states have internal predecessors, (52), 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) [2021-12-14 19:40:43,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-12-14 19:40:43,693 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 16 [2021-12-14 19:40:43,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:43,693 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-12-14 19:40:43,693 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) [2021-12-14 19:40:43,693 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-12-14 19:40:43,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 19:40:43,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:43,694 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:43,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 19:40:43,694 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:43,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:43,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839933, now seen corresponding path program 1 times [2021-12-14 19:40:43,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:43,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998556001] [2021-12-14 19:40:43,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:43,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:43,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:43,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998556001] [2021-12-14 19:40:43,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998556001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:40:43,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124009313] [2021-12-14 19:40:43,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:43,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:40:43,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:40:43,818 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:40:43,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 19:40:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:43,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-14 19:40:43,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:43,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:40:44,056 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:40:44,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-14 19:40:44,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:40:44,261 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:40:44,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:40:44,324 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:40:44,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-14 19:40:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:44,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:40:45,865 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~n#1_3| Int) (v_ArrVal_54 Int)) (or (< |v_ULTIMATE.start_foo_~n#1_3| |c_ULTIMATE.start_main_~i~2#1|) (and (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_12| Int)) (<= (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4) (select (store |c_#length| |v_ULTIMATE.start_foo_~#a~0#1.base_12| v_ArrVal_54) |c_ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |c_ULTIMATE.start_main_~#b~0#1.offset|)) (< v_ArrVal_54 (* 4 |v_ULTIMATE.start_foo_~n#1_3|)))) is different from false [2021-12-14 19:40:46,437 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~n#1_3| Int) (v_ArrVal_54 Int)) (or (and (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_12| Int)) (<= (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4) (select (store |c_#length| |v_ULTIMATE.start_foo_~#a~0#1.base_12| v_ArrVal_54) |c_ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |c_ULTIMATE.start_main_~#b~0#1.offset|)) (< |v_ULTIMATE.start_foo_~n#1_3| (+ |c_ULTIMATE.start_main_~i~2#1| 1)) (< v_ArrVal_54 (* 4 |v_ULTIMATE.start_foo_~n#1_3|)))) is different from false [2021-12-14 19:40:46,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:40:51,304 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_14| Int) (|v_ULTIMATE.start_foo_~n#1_3| Int) (v_ArrVal_54 Int)) (or (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_14|) (and (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_12| Int) (v_ArrVal_52 Int)) (<= (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4) (select (store (store |c_#length| |v_ULTIMATE.start_foo_~#a~0#1.base_14| v_ArrVal_52) |v_ULTIMATE.start_foo_~#a~0#1.base_12| v_ArrVal_54) |c_ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |c_ULTIMATE.start_main_~#b~0#1.offset|)) (< |v_ULTIMATE.start_foo_~n#1_3| (+ |c_ULTIMATE.start_main_~i~2#1| 1)) (< v_ArrVal_54 (* 4 |v_ULTIMATE.start_foo_~n#1_3|)))) is different from false [2021-12-14 19:40:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-14 19:40:51,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124009313] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:40:51,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:40:51,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 7] total 15 [2021-12-14 19:40:51,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689041856] [2021-12-14 19:40:51,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:40:51,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 19:40:51,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:51,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 19:40:51,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=122, Unknown=3, NotChecked=72, Total=240 [2021-12-14 19:40:51,341 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:53,883 INFO L93 Difference]: Finished difference Result 182 states and 219 transitions. [2021-12-14 19:40:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 19:40:53,883 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-14 19:40:53,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:53,885 INFO L225 Difference]: With dead ends: 182 [2021-12-14 19:40:53,885 INFO L226 Difference]: Without dead ends: 182 [2021-12-14 19:40:53,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=175, Invalid=536, Unknown=3, NotChecked=156, Total=870 [2021-12-14 19:40:53,886 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 309 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 468 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:53,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 142 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 148 Invalid, 0 Unknown, 468 Unchecked, 0.1s Time] [2021-12-14 19:40:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-14 19:40:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 101. [2021-12-14 19:40:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 93 states have (on average 1.4301075268817205) internal successors, (133), 100 states have internal predecessors, (133), 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) [2021-12-14 19:40:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2021-12-14 19:40:53,895 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 16 [2021-12-14 19:40:53,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:53,896 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2021-12-14 19:40:53,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:40:53,896 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2021-12-14 19:40:53,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:40:53,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:53,897 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:53,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:54,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:40:54,106 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:54,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:54,107 INFO L85 PathProgramCache]: Analyzing trace with hash -411430410, now seen corresponding path program 1 times [2021-12-14 19:40:54,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:54,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273048928] [2021-12-14 19:40:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:54,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:40:54,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:54,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273048928] [2021-12-14 19:40:54,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273048928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:54,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:54,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:40:54,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082050347] [2021-12-14 19:40:54,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:54,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:40:54,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:54,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:40:54,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:40:54,137 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-12-14 19:40:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:54,152 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2021-12-14 19:40:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:40:54,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 17 [2021-12-14 19:40:54,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:54,154 INFO L225 Difference]: With dead ends: 100 [2021-12-14 19:40:54,154 INFO L226 Difference]: Without dead ends: 100 [2021-12-14 19:40:54,154 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 [2021-12-14 19:40:54,155 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:54,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:40:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-14 19:40:54,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-12-14 19:40:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 93 states have (on average 1.3978494623655915) internal successors, (130), 99 states have internal predecessors, (130), 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) [2021-12-14 19:40:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2021-12-14 19:40:54,162 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 17 [2021-12-14 19:40:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:54,162 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2021-12-14 19:40:54,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-12-14 19:40:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2021-12-14 19:40:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:40:54,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:54,163 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:54,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 19:40:54,164 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:54,164 INFO L85 PathProgramCache]: Analyzing trace with hash -411430409, now seen corresponding path program 1 times [2021-12-14 19:40:54,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:54,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042280132] [2021-12-14 19:40:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:54,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:54,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:54,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042280132] [2021-12-14 19:40:54,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042280132] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:40:54,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608775045] [2021-12-14 19:40:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:54,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:40:54,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:40:54,216 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:40:54,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 19:40:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:54,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 19:40:54,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:54,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:40:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:54,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:40:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:54,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608775045] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:40:54,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:40:54,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-14 19:40:54,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826981296] [2021-12-14 19:40:54,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:40:54,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:40:54,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:54,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:40:54,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:40:54,384 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 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) [2021-12-14 19:40:54,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:54,452 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2021-12-14 19:40:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:40:54,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 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 17 [2021-12-14 19:40:54,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:54,454 INFO L225 Difference]: With dead ends: 147 [2021-12-14 19:40:54,454 INFO L226 Difference]: Without dead ends: 147 [2021-12-14 19:40:54,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:40:54,454 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:54,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 69 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:40:54,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-14 19:40:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2021-12-14 19:40:54,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 98 states have (on average 1.3979591836734695) internal successors, (137), 104 states have internal predecessors, (137), 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) [2021-12-14 19:40:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2021-12-14 19:40:54,459 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 17 [2021-12-14 19:40:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:54,459 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2021-12-14 19:40:54,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 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) [2021-12-14 19:40:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2021-12-14 19:40:54,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 19:40:54,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:54,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:54,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:54,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-14 19:40:54,676 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:54,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:54,677 INFO L85 PathProgramCache]: Analyzing trace with hash 130511665, now seen corresponding path program 1 times [2021-12-14 19:40:54,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:54,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315757158] [2021-12-14 19:40:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:54,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:40:54,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:54,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315757158] [2021-12-14 19:40:54,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315757158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:40:54,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:40:54,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:40:54,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430315519] [2021-12-14 19:40:54,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:40:54,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:40:54,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:54,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:40:54,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:40:54,698 INFO L87 Difference]: Start difference. First operand 105 states and 137 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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) [2021-12-14 19:40:54,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:54,717 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2021-12-14 19:40:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:40:54,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 18 [2021-12-14 19:40:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:54,718 INFO L225 Difference]: With dead ends: 104 [2021-12-14 19:40:54,718 INFO L226 Difference]: Without dead ends: 104 [2021-12-14 19:40:54,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:40:54,719 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:54,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 53 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:40:54,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-14 19:40:54,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-12-14 19:40:54,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.3673469387755102) internal successors, (134), 103 states have internal predecessors, (134), 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) [2021-12-14 19:40:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 134 transitions. [2021-12-14 19:40:54,722 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 134 transitions. Word has length 18 [2021-12-14 19:40:54,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:54,723 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 134 transitions. [2021-12-14 19:40:54,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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) [2021-12-14 19:40:54,727 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 134 transitions. [2021-12-14 19:40:54,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 19:40:54,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:54,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:54,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 19:40:54,733 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:54,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:54,733 INFO L85 PathProgramCache]: Analyzing trace with hash 130511666, now seen corresponding path program 1 times [2021-12-14 19:40:54,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:54,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577586641] [2021-12-14 19:40:54,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:54,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:54,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:54,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577586641] [2021-12-14 19:40:54,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577586641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:40:54,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050666267] [2021-12-14 19:40:54,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:54,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:40:54,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:40:54,780 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:40:54,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 19:40:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:54,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 19:40:54,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:54,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:40:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:54,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050666267] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:40:54,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:40:54,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-14 19:40:54,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830067585] [2021-12-14 19:40:54,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:40:54,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:40:54,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:54,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:40:54,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:40:54,896 INFO L87 Difference]: Start difference. First operand 104 states and 134 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 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) [2021-12-14 19:40:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:54,954 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2021-12-14 19:40:54,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:40:54,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 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 18 [2021-12-14 19:40:54,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:54,955 INFO L225 Difference]: With dead ends: 111 [2021-12-14 19:40:54,955 INFO L226 Difference]: Without dead ends: 111 [2021-12-14 19:40:54,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:40:54,956 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 50 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:54,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 97 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:40:54,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-14 19:40:54,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2021-12-14 19:40:54,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.3265306122448979) internal successors, (130), 103 states have internal predecessors, (130), 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) [2021-12-14 19:40:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-12-14 19:40:54,959 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 18 [2021-12-14 19:40:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:54,959 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-12-14 19:40:54,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 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) [2021-12-14 19:40:54,960 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-12-14 19:40:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:40:54,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:54,960 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:54,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:55,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:40:55,177 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:55,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:55,177 INFO L85 PathProgramCache]: Analyzing trace with hash 624099572, now seen corresponding path program 1 times [2021-12-14 19:40:55,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:55,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782074378] [2021-12-14 19:40:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:55,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:55,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782074378] [2021-12-14 19:40:55,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782074378] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:40:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4449083] [2021-12-14 19:40:55,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:55,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:40:55,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:40:55,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:40:55,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 19:40:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:55,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 19:40:55,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:55,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:40:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:55,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4449083] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:40:55,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:40:55,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-14 19:40:55,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96806611] [2021-12-14 19:40:55,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:40:55,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:40:55,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:55,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:40:55,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:40:55,307 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 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) [2021-12-14 19:40:55,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:55,336 INFO L93 Difference]: Finished difference Result 168 states and 201 transitions. [2021-12-14 19:40:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:40:55,336 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 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 [2021-12-14 19:40:55,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:55,337 INFO L225 Difference]: With dead ends: 168 [2021-12-14 19:40:55,337 INFO L226 Difference]: Without dead ends: 168 [2021-12-14 19:40:55,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:40:55,338 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 130 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:55,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 93 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:40:55,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-14 19:40:55,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 160. [2021-12-14 19:40:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.3051948051948052) internal successors, (201), 159 states have internal predecessors, (201), 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) [2021-12-14 19:40:55,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2021-12-14 19:40:55,342 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 20 [2021-12-14 19:40:55,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:55,342 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2021-12-14 19:40:55,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 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) [2021-12-14 19:40:55,342 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2021-12-14 19:40:55,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 19:40:55,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:55,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:55,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:55,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:40:55,563 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:55,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:55,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1752050598, now seen corresponding path program 1 times [2021-12-14 19:40:55,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:55,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110831088] [2021-12-14 19:40:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:55,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:55,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:55,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110831088] [2021-12-14 19:40:55,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110831088] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:40:55,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367961064] [2021-12-14 19:40:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:55,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:40:55,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:40:55,603 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:40:55,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 19:40:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:55,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 19:40:55,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:55,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:40:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:55,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367961064] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:40:55,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:40:55,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-14 19:40:55,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902824035] [2021-12-14 19:40:55,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:40:55,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:40:55,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:55,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:40:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:40:55,761 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 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) [2021-12-14 19:40:55,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:55,857 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2021-12-14 19:40:55,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:40:55,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 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) Word has length 21 [2021-12-14 19:40:55,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:55,858 INFO L225 Difference]: With dead ends: 160 [2021-12-14 19:40:55,858 INFO L226 Difference]: Without dead ends: 160 [2021-12-14 19:40:55,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:40:55,859 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 128 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:55,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 114 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:40:55,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-14 19:40:55,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-12-14 19:40:55,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 152 states have (on average 1.2894736842105263) internal successors, (196), 157 states have internal predecessors, (196), 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) [2021-12-14 19:40:55,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 196 transitions. [2021-12-14 19:40:55,862 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 196 transitions. Word has length 21 [2021-12-14 19:40:55,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:55,862 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 196 transitions. [2021-12-14 19:40:55,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 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) [2021-12-14 19:40:55,862 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 196 transitions. [2021-12-14 19:40:55,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 19:40:55,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:55,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:55,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:56,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 19:40:56,075 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:56,076 INFO L85 PathProgramCache]: Analyzing trace with hash -93493367, now seen corresponding path program 1 times [2021-12-14 19:40:56,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:56,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120340266] [2021-12-14 19:40:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:56,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:40:56,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:56,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120340266] [2021-12-14 19:40:56,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120340266] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:40:56,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678850017] [2021-12-14 19:40:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:56,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:40:56,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:40:56,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:40:56,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 19:40:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:56,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 19:40:56,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:40:56,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:40:56,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-12-14 19:40:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:40:56,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678850017] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:40:56,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:40:56,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-14 19:40:56,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505419459] [2021-12-14 19:40:56,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:40:56,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:40:56,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:56,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:40:56,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:40:56,377 INFO L87 Difference]: Start difference. First operand 158 states and 196 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 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) [2021-12-14 19:40:56,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:56,491 INFO L93 Difference]: Finished difference Result 220 states and 264 transitions. [2021-12-14 19:40:56,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:40:56,492 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 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) Word has length 23 [2021-12-14 19:40:56,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:56,492 INFO L225 Difference]: With dead ends: 220 [2021-12-14 19:40:56,492 INFO L226 Difference]: Without dead ends: 220 [2021-12-14 19:40:56,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:40:56,493 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 95 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:56,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 98 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:40:56,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-14 19:40:56,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 163. [2021-12-14 19:40:56,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 157 states have (on average 1.2802547770700636) internal successors, (201), 162 states have internal predecessors, (201), 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) [2021-12-14 19:40:56,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 201 transitions. [2021-12-14 19:40:56,496 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 201 transitions. Word has length 23 [2021-12-14 19:40:56,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:56,496 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 201 transitions. [2021-12-14 19:40:56,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 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) [2021-12-14 19:40:56,496 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 201 transitions. [2021-12-14 19:40:56,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-14 19:40:56,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:56,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:56,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:56,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:40:56,711 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:56,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:56,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1409452358, now seen corresponding path program 1 times [2021-12-14 19:40:56,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:56,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180558727] [2021-12-14 19:40:56,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:56,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:40:56,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:56,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180558727] [2021-12-14 19:40:56,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180558727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:40:56,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962058245] [2021-12-14 19:40:56,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:56,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:40:56,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:40:56,745 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:40:56,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 19:40:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:56,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 19:40:56,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:40:56,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:40:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:40:56,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962058245] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:40:56,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:40:56,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2021-12-14 19:40:56,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163918093] [2021-12-14 19:40:56,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:40:56,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:40:56,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:56,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:40:56,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:40:56,911 INFO L87 Difference]: Start difference. First operand 163 states and 201 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 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) [2021-12-14 19:40:56,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:56,979 INFO L93 Difference]: Finished difference Result 158 states and 191 transitions. [2021-12-14 19:40:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:40:56,980 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 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) Word has length 27 [2021-12-14 19:40:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:56,980 INFO L225 Difference]: With dead ends: 158 [2021-12-14 19:40:56,980 INFO L226 Difference]: Without dead ends: 158 [2021-12-14 19:40:56,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:40:56,981 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 98 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:56,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 81 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:40:56,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-14 19:40:56,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2021-12-14 19:40:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.2746478873239437) internal successors, (181), 147 states have internal predecessors, (181), 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) [2021-12-14 19:40:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 181 transitions. [2021-12-14 19:40:56,983 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 181 transitions. Word has length 27 [2021-12-14 19:40:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:56,983 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 181 transitions. [2021-12-14 19:40:56,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 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) [2021-12-14 19:40:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 181 transitions. [2021-12-14 19:40:56,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-14 19:40:56,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:56,984 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:57,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:57,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:40:57,185 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:57,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:57,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1360755252, now seen corresponding path program 1 times [2021-12-14 19:40:57,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:57,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357836511] [2021-12-14 19:40:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:57,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:40:57,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:57,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357836511] [2021-12-14 19:40:57,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357836511] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:40:57,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067293345] [2021-12-14 19:40:57,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:57,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:40:57,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:40:57,234 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:40:57,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 19:40:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:57,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 19:40:57,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:40:57,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:40:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:40:57,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067293345] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:40:57,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:40:57,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-14 19:40:57,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921475767] [2021-12-14 19:40:57,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:40:57,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 19:40:57,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:40:57,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 19:40:57,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:40:57,423 INFO L87 Difference]: Start difference. First operand 148 states and 181 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 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) [2021-12-14 19:40:57,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:40:57,537 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2021-12-14 19:40:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:40:57,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 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 27 [2021-12-14 19:40:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:40:57,538 INFO L225 Difference]: With dead ends: 150 [2021-12-14 19:40:57,538 INFO L226 Difference]: Without dead ends: 150 [2021-12-14 19:40:57,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-12-14 19:40:57,538 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 150 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:40:57,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 169 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:40:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-14 19:40:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2021-12-14 19:40:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 141 states have (on average 1.2624113475177305) internal successors, (178), 146 states have internal predecessors, (178), 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) [2021-12-14 19:40:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2021-12-14 19:40:57,541 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 27 [2021-12-14 19:40:57,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:40:57,541 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2021-12-14 19:40:57,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 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) [2021-12-14 19:40:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2021-12-14 19:40:57,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-14 19:40:57,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:40:57,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:40:57,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 19:40:57,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 19:40:57,747 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:40:57,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:40:57,748 INFO L85 PathProgramCache]: Analyzing trace with hash -144329733, now seen corresponding path program 1 times [2021-12-14 19:40:57,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:40:57,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742365430] [2021-12-14 19:40:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:57,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:40:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:40:57,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:40:57,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742365430] [2021-12-14 19:40:57,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742365430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:40:57,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067753831] [2021-12-14 19:40:57,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:40:57,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:40:57,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:40:57,872 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:40:57,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 19:40:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:40:57,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-14 19:40:57,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:40:58,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:40:58,118 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-14 19:40:58,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-12-14 19:40:58,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 19:40:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:40:58,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:08,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-14 19:41:08,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-14 19:41:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:08,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067753831] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:08,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:08,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 15] total 31 [2021-12-14 19:41:08,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909458384] [2021-12-14 19:41:08,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:08,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-14 19:41:08,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:08,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-14 19:41:08,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=831, Unknown=5, NotChecked=0, Total=930 [2021-12-14 19:41:08,596 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 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) [2021-12-14 19:41:09,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:09,207 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2021-12-14 19:41:09,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 19:41:09,208 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 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 31 [2021-12-14 19:41:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:09,208 INFO L225 Difference]: With dead ends: 127 [2021-12-14 19:41:09,209 INFO L226 Difference]: Without dead ends: 127 [2021-12-14 19:41:09,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=344, Invalid=2201, Unknown=5, NotChecked=0, Total=2550 [2021-12-14 19:41:09,210 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 91 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:09,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 299 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 381 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2021-12-14 19:41:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-14 19:41:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2021-12-14 19:41:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.2372881355932204) internal successors, (146), 123 states have internal predecessors, (146), 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) [2021-12-14 19:41:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2021-12-14 19:41:09,214 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 31 [2021-12-14 19:41:09,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:09,214 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2021-12-14 19:41:09,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 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) [2021-12-14 19:41:09,214 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2021-12-14 19:41:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 19:41:09,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:09,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:09,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:09,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 19:41:09,423 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:09,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:09,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2032716941, now seen corresponding path program 1 times [2021-12-14 19:41:09,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:09,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027704745] [2021-12-14 19:41:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:09,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:41:09,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:09,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027704745] [2021-12-14 19:41:09,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027704745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:09,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549739657] [2021-12-14 19:41:09,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:09,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:09,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:09,603 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:09,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 19:41:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:09,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-14 19:41:09,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:09,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:41:09,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:41:09,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:41:09,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-14 19:41:09,706 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:09,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:41:09,762 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:41:09,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-14 19:41:09,774 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:09,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:41:09,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:41:09,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-14 19:41:09,909 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:09,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:41:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 19:41:09,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:10,106 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-14 19:41:10,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-14 19:41:10,516 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-14 19:41:10,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-14 19:41:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-14 19:41:10,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549739657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:10,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:10,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 16 [2021-12-14 19:41:10,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536197743] [2021-12-14 19:41:10,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:10,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 19:41:10,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:10,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 19:41:10,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-14 19:41:10,724 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand has 17 states, 16 states have (on average 6.375) internal successors, (102), 17 states have internal predecessors, (102), 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) [2021-12-14 19:41:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:11,833 INFO L93 Difference]: Finished difference Result 527 states and 633 transitions. [2021-12-14 19:41:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-14 19:41:11,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 6.375) internal successors, (102), 17 states have internal predecessors, (102), 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 41 [2021-12-14 19:41:11,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:11,834 INFO L225 Difference]: With dead ends: 527 [2021-12-14 19:41:11,834 INFO L226 Difference]: Without dead ends: 527 [2021-12-14 19:41:11,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=751, Invalid=2789, Unknown=0, NotChecked=0, Total=3540 [2021-12-14 19:41:11,836 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 820 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:11,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 255 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 290 Invalid, 0 Unknown, 253 Unchecked, 0.2s Time] [2021-12-14 19:41:11,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-12-14 19:41:11,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 230. [2021-12-14 19:41:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 224 states have (on average 1.28125) internal successors, (287), 229 states have internal predecessors, (287), 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) [2021-12-14 19:41:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 287 transitions. [2021-12-14 19:41:11,840 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 287 transitions. Word has length 41 [2021-12-14 19:41:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:11,840 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 287 transitions. [2021-12-14 19:41:11,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 6.375) internal successors, (102), 17 states have internal predecessors, (102), 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) [2021-12-14 19:41:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 287 transitions. [2021-12-14 19:41:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-14 19:41:11,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:11,841 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:11,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:12,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 19:41:12,041 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:12,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:12,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1410284307, now seen corresponding path program 1 times [2021-12-14 19:41:12,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:12,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044199520] [2021-12-14 19:41:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:12,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:41:12,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:12,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044199520] [2021-12-14 19:41:12,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044199520] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:12,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602961112] [2021-12-14 19:41:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:12,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:12,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:12,106 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:12,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 19:41:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:12,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 19:41:12,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:12,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:41:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:41:12,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:41:12,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602961112] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:12,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:12,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-14 19:41:12,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796318992] [2021-12-14 19:41:12,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:12,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 19:41:12,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:12,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 19:41:12,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:41:12,395 INFO L87 Difference]: Start difference. First operand 230 states and 287 transitions. Second operand has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 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) [2021-12-14 19:41:12,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:12,519 INFO L93 Difference]: Finished difference Result 253 states and 310 transitions. [2021-12-14 19:41:12,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:41:12,519 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 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 42 [2021-12-14 19:41:12,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:12,520 INFO L225 Difference]: With dead ends: 253 [2021-12-14 19:41:12,520 INFO L226 Difference]: Without dead ends: 253 [2021-12-14 19:41:12,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:41:12,521 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 112 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:12,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 166 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:12,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-14 19:41:12,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 236. [2021-12-14 19:41:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 230 states have (on average 1.2739130434782608) internal successors, (293), 235 states have internal predecessors, (293), 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) [2021-12-14 19:41:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 293 transitions. [2021-12-14 19:41:12,524 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 293 transitions. Word has length 42 [2021-12-14 19:41:12,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:12,524 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 293 transitions. [2021-12-14 19:41:12,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 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) [2021-12-14 19:41:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 293 transitions. [2021-12-14 19:41:12,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 19:41:12,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:12,525 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-12-14 19:41:12,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:12,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:12,735 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:12,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:12,736 INFO L85 PathProgramCache]: Analyzing trace with hash 457132991, now seen corresponding path program 2 times [2021-12-14 19:41:12,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:12,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692272888] [2021-12-14 19:41:12,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:12,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 19:41:12,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:12,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692272888] [2021-12-14 19:41:12,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692272888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:12,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314593417] [2021-12-14 19:41:12,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:41:12,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:12,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:12,789 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:12,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 19:41:12,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:41:12,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:12,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 19:41:12,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 19:41:12,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 19:41:13,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314593417] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:13,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:13,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-14 19:41:13,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583349270] [2021-12-14 19:41:13,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:13,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 19:41:13,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:13,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 19:41:13,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:41:13,042 INFO L87 Difference]: Start difference. First operand 236 states and 293 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:13,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:13,150 INFO L93 Difference]: Finished difference Result 202 states and 240 transitions. [2021-12-14 19:41:13,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:41:13,150 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-14 19:41:13,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:13,151 INFO L225 Difference]: With dead ends: 202 [2021-12-14 19:41:13,151 INFO L226 Difference]: Without dead ends: 202 [2021-12-14 19:41:13,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:41:13,152 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 64 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:13,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 198 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:13,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-14 19:41:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 192. [2021-12-14 19:41:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.2473118279569892) internal successors, (232), 191 states have internal predecessors, (232), 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) [2021-12-14 19:41:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 232 transitions. [2021-12-14 19:41:13,155 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 232 transitions. Word has length 47 [2021-12-14 19:41:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:13,155 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 232 transitions. [2021-12-14 19:41:13,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 232 transitions. [2021-12-14 19:41:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 19:41:13,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:13,156 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:13,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:13,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:13,369 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:13,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:13,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1381592458, now seen corresponding path program 2 times [2021-12-14 19:41:13,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:13,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390982209] [2021-12-14 19:41:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:13,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:41:13,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:13,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390982209] [2021-12-14 19:41:13,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390982209] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:13,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658273557] [2021-12-14 19:41:13,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:41:13,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:13,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:13,472 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:13,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 19:41:13,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 19:41:13,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:13,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 19:41:13,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:13,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:41:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 19:41:13,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 19:41:14,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658273557] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:14,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:14,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 16 [2021-12-14 19:41:14,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176729694] [2021-12-14 19:41:14,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:14,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 19:41:14,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:14,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 19:41:14,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-12-14 19:41:14,007 INFO L87 Difference]: Start difference. First operand 192 states and 232 transitions. Second operand has 16 states, 16 states have (on average 6.6875) internal successors, (107), 16 states have internal predecessors, (107), 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) [2021-12-14 19:41:14,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:14,520 INFO L93 Difference]: Finished difference Result 182 states and 211 transitions. [2021-12-14 19:41:14,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 19:41:14,520 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.6875) internal successors, (107), 16 states have internal predecessors, (107), 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 47 [2021-12-14 19:41:14,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:14,521 INFO L225 Difference]: With dead ends: 182 [2021-12-14 19:41:14,521 INFO L226 Difference]: Without dead ends: 182 [2021-12-14 19:41:14,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=1089, Unknown=0, NotChecked=0, Total=1406 [2021-12-14 19:41:14,522 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 217 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:14,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 121 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-14 19:41:14,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 177. [2021-12-14 19:41:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.2034883720930232) internal successors, (207), 176 states have internal predecessors, (207), 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) [2021-12-14 19:41:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 207 transitions. [2021-12-14 19:41:14,525 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 207 transitions. Word has length 47 [2021-12-14 19:41:14,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:14,525 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 207 transitions. [2021-12-14 19:41:14,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.6875) internal successors, (107), 16 states have internal predecessors, (107), 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) [2021-12-14 19:41:14,525 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 207 transitions. [2021-12-14 19:41:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 19:41:14,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:14,526 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-12-14 19:41:14,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:14,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-14 19:41:14,735 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:14,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:14,735 INFO L85 PathProgramCache]: Analyzing trace with hash -269976254, now seen corresponding path program 3 times [2021-12-14 19:41:14,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:14,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366254205] [2021-12-14 19:41:14,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:14,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 19:41:14,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:14,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366254205] [2021-12-14 19:41:14,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366254205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:14,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724576623] [2021-12-14 19:41:14,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:41:14,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:14,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:14,867 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:14,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 19:41:14,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 19:41:14,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:14,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 19:41:14,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 19:41:15,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:15,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-12-14 19:41:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 19:41:15,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724576623] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:15,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:15,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2021-12-14 19:41:15,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658031998] [2021-12-14 19:41:15,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:15,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 19:41:15,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:15,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 19:41:15,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-12-14 19:41:15,435 INFO L87 Difference]: Start difference. First operand 177 states and 207 transitions. Second operand has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 states have internal predecessors, (105), 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) [2021-12-14 19:41:16,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:16,217 INFO L93 Difference]: Finished difference Result 255 states and 300 transitions. [2021-12-14 19:41:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 19:41:16,220 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 states have internal predecessors, (105), 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 52 [2021-12-14 19:41:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:16,220 INFO L225 Difference]: With dead ends: 255 [2021-12-14 19:41:16,221 INFO L226 Difference]: Without dead ends: 255 [2021-12-14 19:41:16,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-12-14 19:41:16,221 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 233 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:16,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 252 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:41:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-14 19:41:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 172. [2021-12-14 19:41:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 168 states have (on average 1.1845238095238095) internal successors, (199), 171 states have internal predecessors, (199), 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) [2021-12-14 19:41:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 199 transitions. [2021-12-14 19:41:16,226 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 199 transitions. Word has length 52 [2021-12-14 19:41:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:16,226 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 199 transitions. [2021-12-14 19:41:16,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 states have internal predecessors, (105), 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) [2021-12-14 19:41:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 199 transitions. [2021-12-14 19:41:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-14 19:41:16,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:16,227 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-14 19:41:16,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:16,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:16,428 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:16,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:16,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1642790799, now seen corresponding path program 2 times [2021-12-14 19:41:16,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:16,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494263329] [2021-12-14 19:41:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:16,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 19:41:16,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:16,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494263329] [2021-12-14 19:41:16,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494263329] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:16,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120878393] [2021-12-14 19:41:16,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:41:16,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:16,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:16,499 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:16,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 19:41:16,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:41:16,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:16,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 19:41:16,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 19:41:16,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 19:41:16,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120878393] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:16,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:16,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-14 19:41:16,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411832400] [2021-12-14 19:41:16,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:16,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 19:41:16,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:16,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 19:41:16,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:41:16,789 INFO L87 Difference]: Start difference. First operand 172 states and 199 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 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) [2021-12-14 19:41:16,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:16,927 INFO L93 Difference]: Finished difference Result 200 states and 227 transitions. [2021-12-14 19:41:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 19:41:16,927 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 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 56 [2021-12-14 19:41:16,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:16,929 INFO L225 Difference]: With dead ends: 200 [2021-12-14 19:41:16,929 INFO L226 Difference]: Without dead ends: 200 [2021-12-14 19:41:16,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-14 19:41:16,929 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 94 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:16,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 244 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:16,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-14 19:41:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 188. [2021-12-14 19:41:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.1684782608695652) internal successors, (215), 187 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 215 transitions. [2021-12-14 19:41:16,932 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 215 transitions. Word has length 56 [2021-12-14 19:41:16,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:16,933 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 215 transitions. [2021-12-14 19:41:16,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 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) [2021-12-14 19:41:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 215 transitions. [2021-12-14 19:41:16,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-14 19:41:16,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:16,933 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-14 19:41:16,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-14 19:41:17,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:17,150 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:17,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash 74449076, now seen corresponding path program 3 times [2021-12-14 19:41:17,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:17,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908727238] [2021-12-14 19:41:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:17,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 19:41:17,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:17,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908727238] [2021-12-14 19:41:17,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908727238] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:17,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129083599] [2021-12-14 19:41:17,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:41:17,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:17,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:17,399 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:17,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 19:41:17,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 19:41:17,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:17,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-14 19:41:17,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:17,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:41:17,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:41:17,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:41:17,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-14 19:41:17,536 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:17,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:41:17,661 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:41:17,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-14 19:41:17,677 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:17,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:41:17,884 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:41:17,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-14 19:41:17,899 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:17,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:41:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 19:41:18,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:18,646 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-14 19:41:18,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-14 19:41:20,306 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-14 19:41:20,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-14 19:41:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 19:41:21,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129083599] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:21,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:21,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 28 [2021-12-14 19:41:21,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644950694] [2021-12-14 19:41:21,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:21,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-14 19:41:21,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:21,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-14 19:41:21,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2021-12-14 19:41:21,393 INFO L87 Difference]: Start difference. First operand 188 states and 215 transitions. Second operand has 29 states, 28 states have (on average 5.607142857142857) internal successors, (157), 29 states have internal predecessors, (157), 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) [2021-12-14 19:41:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:22,018 INFO L93 Difference]: Finished difference Result 332 states and 380 transitions. [2021-12-14 19:41:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 19:41:22,018 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.607142857142857) internal successors, (157), 29 states have internal predecessors, (157), 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 60 [2021-12-14 19:41:22,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:22,019 INFO L225 Difference]: With dead ends: 332 [2021-12-14 19:41:22,019 INFO L226 Difference]: Without dead ends: 332 [2021-12-14 19:41:22,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=355, Invalid=1367, Unknown=0, NotChecked=0, Total=1722 [2021-12-14 19:41:22,020 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 233 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:22,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 276 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 290 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2021-12-14 19:41:22,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-12-14 19:41:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 325. [2021-12-14 19:41:22,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 321 states have (on average 1.158878504672897) internal successors, (372), 324 states have internal predecessors, (372), 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) [2021-12-14 19:41:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 372 transitions. [2021-12-14 19:41:22,024 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 372 transitions. Word has length 60 [2021-12-14 19:41:22,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:22,024 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 372 transitions. [2021-12-14 19:41:22,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.607142857142857) internal successors, (157), 29 states have internal predecessors, (157), 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) [2021-12-14 19:41:22,024 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 372 transitions. [2021-12-14 19:41:22,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-14 19:41:22,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:22,025 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-12-14 19:41:22,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:22,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-14 19:41:22,225 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:22,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:22,226 INFO L85 PathProgramCache]: Analyzing trace with hash -809246151, now seen corresponding path program 1 times [2021-12-14 19:41:22,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:22,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117152982] [2021-12-14 19:41:22,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:22,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 33 proven. 92 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 19:41:22,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:22,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117152982] [2021-12-14 19:41:22,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117152982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:22,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221099926] [2021-12-14 19:41:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:22,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:22,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:22,368 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:22,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-14 19:41:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:22,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 19:41:22,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:22,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:41:22,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-14 19:41:22,712 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:22,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:41:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 19:41:22,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:22,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:41:22,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-14 19:41:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 19:41:23,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221099926] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:23,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:23,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2021-12-14 19:41:23,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564348879] [2021-12-14 19:41:23,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:23,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 19:41:23,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:23,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 19:41:23,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-12-14 19:41:23,238 INFO L87 Difference]: Start difference. First operand 325 states and 372 transitions. Second operand has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 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) [2021-12-14 19:41:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:23,555 INFO L93 Difference]: Finished difference Result 497 states and 568 transitions. [2021-12-14 19:41:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 19:41:23,556 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 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 75 [2021-12-14 19:41:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:23,557 INFO L225 Difference]: With dead ends: 497 [2021-12-14 19:41:23,557 INFO L226 Difference]: Without dead ends: 497 [2021-12-14 19:41:23,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 19:41:23,558 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 174 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:23,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 354 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 318 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-12-14 19:41:23,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-12-14 19:41:23,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 296. [2021-12-14 19:41:23,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 293 states have (on average 1.1433447098976108) internal successors, (335), 295 states have internal predecessors, (335), 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) [2021-12-14 19:41:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 335 transitions. [2021-12-14 19:41:23,577 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 335 transitions. Word has length 75 [2021-12-14 19:41:23,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:23,577 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 335 transitions. [2021-12-14 19:41:23,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 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) [2021-12-14 19:41:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 335 transitions. [2021-12-14 19:41:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-14 19:41:23,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:23,580 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-12-14 19:41:23,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:23,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:23,793 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:23,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:23,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1737117148, now seen corresponding path program 2 times [2021-12-14 19:41:23,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:23,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427101071] [2021-12-14 19:41:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:23,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 13 proven. 137 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 19:41:23,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:23,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427101071] [2021-12-14 19:41:23,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427101071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:23,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504828258] [2021-12-14 19:41:23,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:41:23,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:23,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:23,871 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:23,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-14 19:41:23,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:41:23,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:23,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 19:41:23,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 19:41:24,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 19:41:24,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504828258] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:24,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:24,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2021-12-14 19:41:24,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969439936] [2021-12-14 19:41:24,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:24,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 19:41:24,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:24,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 19:41:24,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-14 19:41:24,274 INFO L87 Difference]: Start difference. First operand 296 states and 335 transitions. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 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) [2021-12-14 19:41:24,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:24,568 INFO L93 Difference]: Finished difference Result 349 states and 391 transitions. [2021-12-14 19:41:24,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 19:41:24,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 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 80 [2021-12-14 19:41:24,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:24,569 INFO L225 Difference]: With dead ends: 349 [2021-12-14 19:41:24,569 INFO L226 Difference]: Without dead ends: 349 [2021-12-14 19:41:24,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=766, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 19:41:24,570 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 313 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:24,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 265 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:41:24,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-12-14 19:41:24,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 289. [2021-12-14 19:41:24,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 286 states have (on average 1.1293706293706294) internal successors, (323), 288 states have internal predecessors, (323), 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) [2021-12-14 19:41:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 323 transitions. [2021-12-14 19:41:24,574 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 323 transitions. Word has length 80 [2021-12-14 19:41:24,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:24,574 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 323 transitions. [2021-12-14 19:41:24,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 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) [2021-12-14 19:41:24,574 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 323 transitions. [2021-12-14 19:41:24,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-14 19:41:24,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:24,574 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:24,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:24,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:24,788 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:24,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:24,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1014039297, now seen corresponding path program 1 times [2021-12-14 19:41:24,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:24,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686265187] [2021-12-14 19:41:24,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:24,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 101 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 19:41:24,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:24,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686265187] [2021-12-14 19:41:24,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686265187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:24,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711794873] [2021-12-14 19:41:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:24,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:24,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:24,859 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:24,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-14 19:41:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:24,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 19:41:24,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 130 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 19:41:25,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 130 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 19:41:25,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711794873] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:25,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:25,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-14 19:41:25,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302488576] [2021-12-14 19:41:25,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:25,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 19:41:25,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:25,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 19:41:25,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:41:25,289 INFO L87 Difference]: Start difference. First operand 289 states and 323 transitions. Second operand has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 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) [2021-12-14 19:41:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:25,441 INFO L93 Difference]: Finished difference Result 295 states and 323 transitions. [2021-12-14 19:41:25,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:41:25,441 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 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 98 [2021-12-14 19:41:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:25,442 INFO L225 Difference]: With dead ends: 295 [2021-12-14 19:41:25,442 INFO L226 Difference]: Without dead ends: 295 [2021-12-14 19:41:25,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-12-14 19:41:25,443 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 67 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:25,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 320 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:25,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-14 19:41:25,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 289. [2021-12-14 19:41:25,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 286 states have (on average 1.1083916083916083) internal successors, (317), 288 states have internal predecessors, (317), 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) [2021-12-14 19:41:25,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 317 transitions. [2021-12-14 19:41:25,457 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 317 transitions. Word has length 98 [2021-12-14 19:41:25,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:25,457 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 317 transitions. [2021-12-14 19:41:25,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 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) [2021-12-14 19:41:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 317 transitions. [2021-12-14 19:41:25,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 19:41:25,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:25,458 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:25,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:25,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:25,666 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:25,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:25,666 INFO L85 PathProgramCache]: Analyzing trace with hash -728466762, now seen corresponding path program 2 times [2021-12-14 19:41:25,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:25,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009739110] [2021-12-14 19:41:25,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:25,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-14 19:41:25,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:25,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009739110] [2021-12-14 19:41:25,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009739110] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:25,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479631617] [2021-12-14 19:41:25,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:41:25,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:25,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:25,719 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:25,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-14 19:41:25,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:41:25,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:25,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:41:25,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 19:41:26,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 19:41:26,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479631617] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:26,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:26,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 18 [2021-12-14 19:41:26,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419490422] [2021-12-14 19:41:26,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:26,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 19:41:26,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:26,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 19:41:26,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-14 19:41:26,244 INFO L87 Difference]: Start difference. First operand 289 states and 317 transitions. Second operand has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 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) [2021-12-14 19:41:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:26,566 INFO L93 Difference]: Finished difference Result 381 states and 410 transitions. [2021-12-14 19:41:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 19:41:26,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 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 103 [2021-12-14 19:41:26,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:26,568 INFO L225 Difference]: With dead ends: 381 [2021-12-14 19:41:26,568 INFO L226 Difference]: Without dead ends: 381 [2021-12-14 19:41:26,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2021-12-14 19:41:26,569 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 354 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:26,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 361 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-12-14 19:41:26,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 318. [2021-12-14 19:41:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 315 states have (on average 1.092063492063492) internal successors, (344), 317 states have internal predecessors, (344), 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) [2021-12-14 19:41:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 344 transitions. [2021-12-14 19:41:26,572 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 344 transitions. Word has length 103 [2021-12-14 19:41:26,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:26,573 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 344 transitions. [2021-12-14 19:41:26,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 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) [2021-12-14 19:41:26,573 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 344 transitions. [2021-12-14 19:41:26,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-14 19:41:26,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:26,573 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1] [2021-12-14 19:41:26,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:26,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-14 19:41:26,781 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:26,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:26,781 INFO L85 PathProgramCache]: Analyzing trace with hash 141914171, now seen corresponding path program 3 times [2021-12-14 19:41:26,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:26,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805829242] [2021-12-14 19:41:26,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:26,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 152 proven. 201 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-14 19:41:26,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:26,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805829242] [2021-12-14 19:41:26,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805829242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:26,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357640778] [2021-12-14 19:41:26,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:41:26,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:26,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:26,968 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:26,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-14 19:41:27,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 19:41:27,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:27,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-14 19:41:27,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:27,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:41:27,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-14 19:41:27,203 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:27,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:41:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 137 proven. 3 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-12-14 19:41:27,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 128 proven. 12 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-12-14 19:41:27,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357640778] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:27,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:27,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2021-12-14 19:41:27,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960882034] [2021-12-14 19:41:27,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:27,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 19:41:27,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:27,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 19:41:27,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-12-14 19:41:27,841 INFO L87 Difference]: Start difference. First operand 318 states and 344 transitions. Second operand has 24 states, 23 states have (on average 6.391304347826087) internal successors, (147), 24 states have internal predecessors, (147), 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) [2021-12-14 19:41:28,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:28,949 INFO L93 Difference]: Finished difference Result 429 states and 465 transitions. [2021-12-14 19:41:28,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-14 19:41:28,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.391304347826087) internal successors, (147), 24 states have internal predecessors, (147), 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 118 [2021-12-14 19:41:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:28,961 INFO L225 Difference]: With dead ends: 429 [2021-12-14 19:41:28,961 INFO L226 Difference]: Without dead ends: 429 [2021-12-14 19:41:28,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=669, Invalid=2301, Unknown=0, NotChecked=0, Total=2970 [2021-12-14 19:41:28,965 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 347 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:28,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 304 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 589 Invalid, 0 Unknown, 102 Unchecked, 0.3s Time] [2021-12-14 19:41:28,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-12-14 19:41:28,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 187. [2021-12-14 19:41:28,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 185 states have (on average 1.0702702702702702) internal successors, (198), 186 states have internal predecessors, (198), 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) [2021-12-14 19:41:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 198 transitions. [2021-12-14 19:41:28,969 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 198 transitions. Word has length 118 [2021-12-14 19:41:28,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:28,969 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 198 transitions. [2021-12-14 19:41:28,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.391304347826087) internal successors, (147), 24 states have internal predecessors, (147), 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) [2021-12-14 19:41:28,970 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 198 transitions. [2021-12-14 19:41:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-14 19:41:28,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:28,971 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1] [2021-12-14 19:41:28,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-14 19:41:29,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-14 19:41:29,187 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:29,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:29,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1562413406, now seen corresponding path program 4 times [2021-12-14 19:41:29,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:29,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615068655] [2021-12-14 19:41:29,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:29,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 277 proven. 176 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-14 19:41:29,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:29,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615068655] [2021-12-14 19:41:29,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615068655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:29,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668026174] [2021-12-14 19:41:29,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 19:41:29,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:29,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:29,299 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:29,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-14 19:41:29,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 19:41:29,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:29,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:41:29,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 323 proven. 130 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-14 19:41:29,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 323 proven. 130 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-14 19:41:30,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668026174] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:30,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:30,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-14 19:41:30,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130658073] [2021-12-14 19:41:30,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:30,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 19:41:30,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:30,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 19:41:30,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-14 19:41:30,172 INFO L87 Difference]: Start difference. First operand 187 states and 198 transitions. Second operand has 17 states, 17 states have (on average 8.0) internal successors, (136), 17 states have internal predecessors, (136), 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) [2021-12-14 19:41:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:30,406 INFO L93 Difference]: Finished difference Result 205 states and 216 transitions. [2021-12-14 19:41:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 19:41:30,406 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.0) internal successors, (136), 17 states have internal predecessors, (136), 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 136 [2021-12-14 19:41:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:30,407 INFO L225 Difference]: With dead ends: 205 [2021-12-14 19:41:30,407 INFO L226 Difference]: Without dead ends: 205 [2021-12-14 19:41:30,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2021-12-14 19:41:30,408 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 76 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:30,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 369 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:41:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-14 19:41:30,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 197. [2021-12-14 19:41:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 195 states have (on average 1.0666666666666667) internal successors, (208), 196 states have internal predecessors, (208), 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) [2021-12-14 19:41:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 208 transitions. [2021-12-14 19:41:30,410 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 208 transitions. Word has length 136 [2021-12-14 19:41:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:30,410 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 208 transitions. [2021-12-14 19:41:30,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.0) internal successors, (136), 17 states have internal predecessors, (136), 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) [2021-12-14 19:41:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 208 transitions. [2021-12-14 19:41:30,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-14 19:41:30,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:30,411 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1] [2021-12-14 19:41:30,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:30,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:30,621 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:30,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:30,622 INFO L85 PathProgramCache]: Analyzing trace with hash 188104713, now seen corresponding path program 5 times [2021-12-14 19:41:30,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:30,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384358982] [2021-12-14 19:41:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:30,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:30,738 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 179 proven. 305 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 19:41:30,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:30,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384358982] [2021-12-14 19:41:30,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384358982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:30,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229053729] [2021-12-14 19:41:30,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 19:41:30,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:30,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:30,740 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:30,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-14 19:41:31,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-14 19:41:31,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:31,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:41:31,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 282 proven. 31 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-14 19:41:31,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 282 proven. 31 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-14 19:41:31,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229053729] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:31,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:31,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2021-12-14 19:41:31,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589847841] [2021-12-14 19:41:31,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:31,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 19:41:31,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:31,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 19:41:31,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-12-14 19:41:31,675 INFO L87 Difference]: Start difference. First operand 197 states and 208 transitions. Second operand has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 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) [2021-12-14 19:41:32,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:32,132 INFO L93 Difference]: Finished difference Result 211 states and 222 transitions. [2021-12-14 19:41:32,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-14 19:41:32,132 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 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 141 [2021-12-14 19:41:32,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:32,133 INFO L225 Difference]: With dead ends: 211 [2021-12-14 19:41:32,133 INFO L226 Difference]: Without dead ends: 211 [2021-12-14 19:41:32,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 269 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=1741, Unknown=0, NotChecked=0, Total=2256 [2021-12-14 19:41:32,134 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 162 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:32,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 310 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:41:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-14 19:41:32,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2021-12-14 19:41:32,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 203 states have (on average 1.064039408866995) internal successors, (216), 204 states have internal predecessors, (216), 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) [2021-12-14 19:41:32,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 216 transitions. [2021-12-14 19:41:32,136 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 216 transitions. Word has length 141 [2021-12-14 19:41:32,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:32,136 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 216 transitions. [2021-12-14 19:41:32,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 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) [2021-12-14 19:41:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 216 transitions. [2021-12-14 19:41:32,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 19:41:32,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:32,137 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1] [2021-12-14 19:41:32,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-14 19:41:32,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:32,350 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:32,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:32,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2033693772, now seen corresponding path program 6 times [2021-12-14 19:41:32,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:32,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842060399] [2021-12-14 19:41:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:32,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 19:41:32,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:32,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842060399] [2021-12-14 19:41:32,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842060399] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:32,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544101851] [2021-12-14 19:41:32,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 19:41:32,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:32,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:32,804 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:32,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-14 19:41:33,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-14 19:41:33,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:33,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-14 19:41:33,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:33,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:41:33,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:41:33,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:41:33,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-14 19:41:33,115 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:33,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:41:33,181 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:41:33,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-14 19:41:33,195 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:33,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:41:33,299 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:41:33,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-14 19:41:33,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:41:33,510 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:33,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:41:33,531 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:41:33,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-14 19:41:33,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:41:33,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:41:33,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-14 19:41:33,886 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-14 19:41:33,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-12-14 19:41:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 274 proven. 201 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-14 19:41:34,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:35,323 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-14 19:41:35,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-14 19:41:36,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:41:38,347 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-14 19:41:38,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-14 19:41:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 447 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-14 19:41:38,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544101851] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:38,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:38,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 14] total 49 [2021-12-14 19:41:38,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870392014] [2021-12-14 19:41:38,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:38,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-14 19:41:38,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:38,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-14 19:41:38,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2029, Unknown=0, NotChecked=0, Total=2450 [2021-12-14 19:41:38,840 INFO L87 Difference]: Start difference. First operand 205 states and 216 transitions. Second operand has 50 states, 49 states have (on average 5.63265306122449) internal successors, (276), 50 states have internal predecessors, (276), 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) [2021-12-14 19:41:43,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:43,003 INFO L93 Difference]: Finished difference Result 475 states and 510 transitions. [2021-12-14 19:41:43,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-14 19:41:43,015 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 5.63265306122449) internal successors, (276), 50 states have internal predecessors, (276), 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 145 [2021-12-14 19:41:43,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:43,016 INFO L225 Difference]: With dead ends: 475 [2021-12-14 19:41:43,017 INFO L226 Difference]: Without dead ends: 475 [2021-12-14 19:41:43,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 275 SyntacticMatches, 34 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5198 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2839, Invalid=12661, Unknown=0, NotChecked=0, Total=15500 [2021-12-14 19:41:43,020 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1037 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 461 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:43,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 792 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1418 Invalid, 0 Unknown, 461 Unchecked, 0.6s Time] [2021-12-14 19:41:43,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-12-14 19:41:43,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 279. [2021-12-14 19:41:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 277 states have (on average 1.0866425992779782) internal successors, (301), 278 states have internal predecessors, (301), 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) [2021-12-14 19:41:43,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 301 transitions. [2021-12-14 19:41:43,024 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 301 transitions. Word has length 145 [2021-12-14 19:41:43,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:43,024 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 301 transitions. [2021-12-14 19:41:43,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 5.63265306122449) internal successors, (276), 50 states have internal predecessors, (276), 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) [2021-12-14 19:41:43,024 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 301 transitions. [2021-12-14 19:41:43,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-14 19:41:43,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:43,025 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:43,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:43,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:43,239 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:43,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:43,240 INFO L85 PathProgramCache]: Analyzing trace with hash 903493234, now seen corresponding path program 3 times [2021-12-14 19:41:43,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:43,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253217877] [2021-12-14 19:41:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:43,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 0 proven. 510 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-14 19:41:43,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:43,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253217877] [2021-12-14 19:41:43,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253217877] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:43,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618525292] [2021-12-14 19:41:43,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:41:43,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:43,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:43,318 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:43,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-14 19:41:43,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-14 19:41:43,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:43,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 19:41:43,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 0 proven. 510 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-14 19:41:43,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 0 proven. 510 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-14 19:41:44,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618525292] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:44,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:44,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-14 19:41:44,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931302513] [2021-12-14 19:41:44,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:44,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 19:41:44,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:44,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 19:41:44,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:41:44,036 INFO L87 Difference]: Start difference. First operand 279 states and 301 transitions. Second operand has 15 states, 15 states have (on average 13.666666666666666) internal successors, (205), 15 states have internal predecessors, (205), 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) [2021-12-14 19:41:44,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:44,105 INFO L93 Difference]: Finished difference Result 1336 states and 1450 transitions. [2021-12-14 19:41:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 19:41:44,107 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 13.666666666666666) internal successors, (205), 15 states have internal predecessors, (205), 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 154 [2021-12-14 19:41:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:44,110 INFO L225 Difference]: With dead ends: 1336 [2021-12-14 19:41:44,110 INFO L226 Difference]: Without dead ends: 1336 [2021-12-14 19:41:44,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:41:44,111 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 333 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:44,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 243 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:44,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2021-12-14 19:41:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1330. [2021-12-14 19:41:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1328 states have (on average 1.091867469879518) internal successors, (1450), 1329 states have internal predecessors, (1450), 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) [2021-12-14 19:41:44,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1450 transitions. [2021-12-14 19:41:44,128 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1450 transitions. Word has length 154 [2021-12-14 19:41:44,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:44,129 INFO L470 AbstractCegarLoop]: Abstraction has 1330 states and 1450 transitions. [2021-12-14 19:41:44,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 13.666666666666666) internal successors, (205), 15 states have internal predecessors, (205), 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) [2021-12-14 19:41:44,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1450 transitions. [2021-12-14 19:41:44,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-14 19:41:44,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:44,130 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 1, 1, 1] [2021-12-14 19:41:44,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:44,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-14 19:41:44,343 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:44,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:44,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1946407224, now seen corresponding path program 7 times [2021-12-14 19:41:44,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:44,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553230782] [2021-12-14 19:41:44,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:44,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 470 proven. 583 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-14 19:41:44,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:44,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553230782] [2021-12-14 19:41:44,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553230782] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:44,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439612963] [2021-12-14 19:41:44,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 19:41:44,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:44,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:44,532 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:44,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-14 19:41:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:44,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 19:41:44,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 535 proven. 518 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-14 19:41:45,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 535 proven. 518 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-14 19:41:45,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439612963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:45,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:45,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2021-12-14 19:41:45,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170505209] [2021-12-14 19:41:45,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:45,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 19:41:45,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:45,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 19:41:45,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-12-14 19:41:45,482 INFO L87 Difference]: Start difference. First operand 1330 states and 1450 transitions. Second operand has 25 states, 25 states have (on average 6.84) internal successors, (171), 25 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) [2021-12-14 19:41:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:45,849 INFO L93 Difference]: Finished difference Result 1477 states and 1597 transitions. [2021-12-14 19:41:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 19:41:45,849 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.84) internal successors, (171), 25 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) Word has length 197 [2021-12-14 19:41:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:45,853 INFO L225 Difference]: With dead ends: 1477 [2021-12-14 19:41:45,853 INFO L226 Difference]: Without dead ends: 1477 [2021-12-14 19:41:45,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 382 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 19:41:45,854 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 126 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:45,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 737 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:41:45,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2021-12-14 19:41:45,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1414. [2021-12-14 19:41:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1412 states have (on average 1.0864022662889519) internal successors, (1534), 1413 states have internal predecessors, (1534), 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) [2021-12-14 19:41:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1534 transitions. [2021-12-14 19:41:45,866 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1534 transitions. Word has length 197 [2021-12-14 19:41:45,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:45,866 INFO L470 AbstractCegarLoop]: Abstraction has 1414 states and 1534 transitions. [2021-12-14 19:41:45,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.84) internal successors, (171), 25 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) [2021-12-14 19:41:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1534 transitions. [2021-12-14 19:41:45,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-14 19:41:45,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:45,867 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 1, 1, 1] [2021-12-14 19:41:45,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:46,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-14 19:41:46,086 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-14 19:41:46,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:46,086 INFO L85 PathProgramCache]: Analyzing trace with hash 869936011, now seen corresponding path program 8 times [2021-12-14 19:41:46,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:46,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36837313] [2021-12-14 19:41:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:46,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 1115 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-14 19:41:46,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:46,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36837313] [2021-12-14 19:41:46,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36837313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:46,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277391705] [2021-12-14 19:41:46,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:41:46,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:46,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:46,723 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:46,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-14 19:41:46,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:41:46,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:46,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-14 19:41:46,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:46,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:41:46,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 19:41:46,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:41:46,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-14 19:41:46,958 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:46,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:41:47,069 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:41:47,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-14 19:41:47,083 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:47,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:41:47,298 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:41:47,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-14 19:41:47,313 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:47,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:41:47,575 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:41:47,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-14 19:41:47,587 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:47,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 19:41:47,896 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:41:47,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-14 19:41:47,911 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:41:47,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11