./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_partition_original_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_partition_original_ground.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c423fd522e95226e38270ab4d82928946afe4ab8940cfd611684a61e552aff6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:24:07,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:24:07,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:24:07,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:24:07,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:24:07,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:24:07,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:24:07,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:24:07,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:24:07,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:24:07,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:24:07,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:24:07,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:24:07,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:24:07,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:24:07,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:24:07,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:24:07,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:24:07,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:24:07,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:24:07,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:24:07,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:24:07,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:24:07,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:24:07,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:24:07,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:24:07,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:24:07,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:24:07,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:24:07,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:24:07,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:24:07,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:24:07,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:24:07,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:24:07,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:24:07,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:24:07,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:24:07,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:24:07,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:24:07,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:24:07,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:24:07,907 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:24:07,935 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:24:07,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:24:07,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:24:07,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:24:07,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:24:07,937 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:24:07,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:24:07,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:24:07,939 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:24:07,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:24:07,940 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:24:07,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:24:07,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:24:07,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:24:07,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:24:07,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:24:07,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:24:07,941 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:24:07,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:24:07,941 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:24:07,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:24:07,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:24:07,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:24:07,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:24:07,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:24:07,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:24:07,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:24:07,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:24:07,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:24:07,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:24:07,943 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:24:07,943 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:24:07,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:24:07,943 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c423fd522e95226e38270ab4d82928946afe4ab8940cfd611684a61e552aff6 [2021-12-27 21:24:08,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:24:08,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:24:08,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:24:08,253 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:24:08,254 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:24:08,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2021-12-27 21:24:08,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf41c45d6/226a79c01e5b472687616102fd213b15/FLAG6663b3c18 [2021-12-27 21:24:08,616 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:24:08,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2021-12-27 21:24:08,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf41c45d6/226a79c01e5b472687616102fd213b15/FLAG6663b3c18 [2021-12-27 21:24:09,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf41c45d6/226a79c01e5b472687616102fd213b15 [2021-12-27 21:24:09,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:24:09,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:24:09,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:24:09,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:24:09,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:24:09,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:24:09" (1/1) ... [2021-12-27 21:24:09,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e38833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:24:09, skipping insertion in model container [2021-12-27 21:24:09,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:24:09" (1/1) ... [2021-12-27 21:24:09,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:24:09,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:24:09,159 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_original_ground.i[827,840] [2021-12-27 21:24:09,171 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:24:09,176 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:24:09,184 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_original_ground.i[827,840] [2021-12-27 21:24:09,189 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:24:09,198 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:24:09,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:24:09 WrapperNode [2021-12-27 21:24:09,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:24:09,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:24:09,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:24:09,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:24:09,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:24:09" (1/1) ... [2021-12-27 21:24:09,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:24:09" (1/1) ... [2021-12-27 21:24:09,249 INFO L137 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2021-12-27 21:24:09,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:24:09,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:24:09,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:24:09,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:24:09,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:24:09" (1/1) ... [2021-12-27 21:24:09,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:24:09" (1/1) ... [2021-12-27 21:24:09,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:24:09" (1/1) ... [2021-12-27 21:24:09,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:24:09" (1/1) ... [2021-12-27 21:24:09,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:24:09" (1/1) ... [2021-12-27 21:24:09,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:24:09" (1/1) ... [2021-12-27 21:24:09,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:24:09" (1/1) ... [2021-12-27 21:24:09,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:24:09,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:24:09,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:24:09,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:24:09,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:24:09" (1/1) ... [2021-12-27 21:24:09,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:24:09,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:24:09,292 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) [2021-12-27 21:24:09,294 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 [2021-12-27 21:24:09,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:24:09,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:24:09,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 21:24:09,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 21:24:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:24:09,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:24:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 21:24:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-27 21:24:09,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-27 21:24:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 21:24:09,367 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:24:09,368 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:24:09,527 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:24:09,531 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:24:09,531 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-27 21:24:09,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:24:09 BoogieIcfgContainer [2021-12-27 21:24:09,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:24:09,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:24:09,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:24:09,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:24:09,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:24:09" (1/3) ... [2021-12-27 21:24:09,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a784b9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:24:09, skipping insertion in model container [2021-12-27 21:24:09,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:24:09" (2/3) ... [2021-12-27 21:24:09,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a784b9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:24:09, skipping insertion in model container [2021-12-27 21:24:09,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:24:09" (3/3) ... [2021-12-27 21:24:09,561 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2021-12-27 21:24:09,565 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:24:09,565 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:24:09,630 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:24:09,637 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-12-27 21:24:09,637 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:24:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:24:09,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-27 21:24:09,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:24:09,661 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:24:09,662 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:24:09,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:24:09,666 INFO L85 PathProgramCache]: Analyzing trace with hash -709303782, now seen corresponding path program 1 times [2021-12-27 21:24:09,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:24:09,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742128710] [2021-12-27 21:24:09,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:24:09,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:24:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:24:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:24:09,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:24:09,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742128710] [2021-12-27 21:24:09,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742128710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:24:09,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:24:09,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:24:09,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397941685] [2021-12-27 21:24:09,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:24:09,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:24:09,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:24:09,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:24:09,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:24:09,866 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:09,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:24:09,896 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2021-12-27 21:24:09,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:24:09,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-27 21:24:09,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:24:09,912 INFO L225 Difference]: With dead ends: 52 [2021-12-27 21:24:09,912 INFO L226 Difference]: Without dead ends: 25 [2021-12-27 21:24:09,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:24:09,918 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:24:09,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:24:09,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-27 21:24:09,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-27 21:24:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:24:09,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-12-27 21:24:09,953 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 10 [2021-12-27 21:24:09,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:24:09,954 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-12-27 21:24:09,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:09,955 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-12-27 21:24:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-27 21:24:09,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:24:09,956 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:24:09,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 21:24:09,957 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:24:09,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:24:09,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1757860049, now seen corresponding path program 1 times [2021-12-27 21:24:09,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:24:09,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604008300] [2021-12-27 21:24:09,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:24:09,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:24:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:24:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:24:10,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:24:10,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604008300] [2021-12-27 21:24:10,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604008300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:24:10,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:24:10,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:24:10,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851423103] [2021-12-27 21:24:10,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:24:10,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:24:10,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:24:10,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:24:10,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:24:10,018 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:24:10,045 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2021-12-27 21:24:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:24:10,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-27 21:24:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:24:10,047 INFO L225 Difference]: With dead ends: 43 [2021-12-27 21:24:10,047 INFO L226 Difference]: Without dead ends: 27 [2021-12-27 21:24:10,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:24:10,052 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:24:10,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 43 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:24:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-27 21:24:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-12-27 21:24:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:24:10,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-12-27 21:24:10,062 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 12 [2021-12-27 21:24:10,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:24:10,067 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-12-27 21:24:10,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-12-27 21:24:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-27 21:24:10,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:24:10,070 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:24:10,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 21:24:10,071 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:24:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:24:10,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1154344644, now seen corresponding path program 1 times [2021-12-27 21:24:10,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:24:10,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709152113] [2021-12-27 21:24:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:24:10,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:24:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:24:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:24:10,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:24:10,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709152113] [2021-12-27 21:24:10,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709152113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:24:10,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142125424] [2021-12-27 21:24:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:24:10,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:24:10,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:24:10,108 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) [2021-12-27 21:24:10,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 21:24:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:24:10,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-27 21:24:10,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:24:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:24:10,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:24:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:24:10,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142125424] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:24:10,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:24:10,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-27 21:24:10,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852409677] [2021-12-27 21:24:10,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:24:10,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-27 21:24:10,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:24:10,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-27 21:24:10,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-27 21:24:10,261 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:10,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:24:10,286 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-12-27 21:24:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-27 21:24:10,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-27 21:24:10,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:24:10,287 INFO L225 Difference]: With dead ends: 51 [2021-12-27 21:24:10,287 INFO L226 Difference]: Without dead ends: 31 [2021-12-27 21:24:10,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-27 21:24:10,289 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:24:10,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 74 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:24:10,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-27 21:24:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-27 21:24:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:24:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-12-27 21:24:10,293 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2021-12-27 21:24:10,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:24:10,293 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-12-27 21:24:10,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:10,293 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-12-27 21:24:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-27 21:24:10,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:24:10,294 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:24:10,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 21:24:10,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:24:10,511 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:24:10,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:24:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2107451126, now seen corresponding path program 2 times [2021-12-27 21:24:10,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:24:10,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729398556] [2021-12-27 21:24:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:24:10,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:24:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:24:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-27 21:24:10,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:24:10,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729398556] [2021-12-27 21:24:10,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729398556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:24:10,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617110737] [2021-12-27 21:24:10,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:24:10,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:24:10,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:24:10,560 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) [2021-12-27 21:24:10,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 21:24:10,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:24:10,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:24:10,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:24:10,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:24:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:24:10,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:24:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:24:10,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617110737] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:24:10,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:24:10,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-27 21:24:10,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654760241] [2021-12-27 21:24:10,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:24:10,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-27 21:24:10,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:24:10,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-27 21:24:10,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-27 21:24:10,757 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:10,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:24:10,873 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2021-12-27 21:24:10,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-27 21:24:10,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-27 21:24:10,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:24:10,874 INFO L225 Difference]: With dead ends: 68 [2021-12-27 21:24:10,874 INFO L226 Difference]: Without dead ends: 48 [2021-12-27 21:24:10,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-12-27 21:24:10,875 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:24:10,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 220 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:24:10,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-27 21:24:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-12-27 21:24:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:24:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-27 21:24:10,880 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 21 [2021-12-27 21:24:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:24:10,880 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-27 21:24:10,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-27 21:24:10,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-27 21:24:10,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:24:10,881 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:24:10,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-27 21:24:11,100 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,SelfDestructingSolverStorable3 [2021-12-27 21:24:11,101 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:24:11,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:24:11,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1706483837, now seen corresponding path program 3 times [2021-12-27 21:24:11,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:24:11,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714626563] [2021-12-27 21:24:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:24:11,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:24:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:24:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 21:24:11,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:24:11,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714626563] [2021-12-27 21:24:11,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714626563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:24:11,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485563012] [2021-12-27 21:24:11,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:24:11,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:24:11,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:24:11,239 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) [2021-12-27 21:24:11,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 21:24:11,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-27 21:24:11,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:24:11,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:24:11,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:24:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-27 21:24:11,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:24:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-27 21:24:11,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485563012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:24:11,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:24:11,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2021-12-27 21:24:11,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311016381] [2021-12-27 21:24:11,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:24:11,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-27 21:24:11,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:24:11,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-27 21:24:11,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-27 21:24:11,516 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:24:11,678 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2021-12-27 21:24:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-27 21:24:11,679 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-27 21:24:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:24:11,679 INFO L225 Difference]: With dead ends: 84 [2021-12-27 21:24:11,679 INFO L226 Difference]: Without dead ends: 61 [2021-12-27 21:24:11,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=556, Unknown=0, NotChecked=0, Total=870 [2021-12-27 21:24:11,681 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:24:11,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 159 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:24:11,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-27 21:24:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-12-27 21:24:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:24:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-12-27 21:24:11,686 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 36 [2021-12-27 21:24:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:24:11,686 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-12-27 21:24:11,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-12-27 21:24:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-27 21:24:11,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:24:11,687 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:24:11,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 21:24:11,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:24:11,904 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:24:11,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:24:11,904 INFO L85 PathProgramCache]: Analyzing trace with hash 917953989, now seen corresponding path program 4 times [2021-12-27 21:24:11,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:24:11,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463733206] [2021-12-27 21:24:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:24:11,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:24:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:24:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-27 21:24:12,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:24:12,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463733206] [2021-12-27 21:24:12,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463733206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:24:12,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151395080] [2021-12-27 21:24:12,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 21:24:12,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:24:12,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:24:12,044 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) [2021-12-27 21:24:12,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 21:24:12,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 21:24:12,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:24:12,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-27 21:24:12,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:24:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-27 21:24:12,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:24:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-27 21:24:12,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151395080] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:24:12,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:24:12,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2021-12-27 21:24:12,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921527407] [2021-12-27 21:24:12,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:24:12,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-27 21:24:12,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:24:12,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-27 21:24:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-12-27 21:24:12,464 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:12,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:24:12,529 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2021-12-27 21:24:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-27 21:24:12,532 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-27 21:24:12,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:24:12,533 INFO L225 Difference]: With dead ends: 121 [2021-12-27 21:24:12,533 INFO L226 Difference]: Without dead ends: 86 [2021-12-27 21:24:12,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-12-27 21:24:12,534 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:24:12,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 146 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:24:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-27 21:24:12,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-27 21:24:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 82 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:24:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2021-12-27 21:24:12,540 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 50 [2021-12-27 21:24:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:24:12,540 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2021-12-27 21:24:12,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2021-12-27 21:24:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-27 21:24:12,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:24:12,542 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:24:12,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-27 21:24:12,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:24:12,755 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:24:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:24:12,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1581858143, now seen corresponding path program 5 times [2021-12-27 21:24:12,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:24:12,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760626124] [2021-12-27 21:24:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:24:12,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:24:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:24:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-27 21:24:13,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:24:13,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760626124] [2021-12-27 21:24:13,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760626124] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:24:13,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665916963] [2021-12-27 21:24:13,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-27 21:24:13,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:24:13,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:24:13,132 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) [2021-12-27 21:24:13,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 21:24:14,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-12-27 21:24:14,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:24:14,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-27 21:24:14,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:24:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-27 21:24:14,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:24:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-27 21:24:15,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665916963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:24:15,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:24:15,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2021-12-27 21:24:15,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495513827] [2021-12-27 21:24:15,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:24:15,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-27 21:24:15,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:24:15,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-27 21:24:15,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-27 21:24:15,170 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:24:15,295 INFO L93 Difference]: Finished difference Result 173 states and 218 transitions. [2021-12-27 21:24:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-27 21:24:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-27 21:24:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:24:15,296 INFO L225 Difference]: With dead ends: 173 [2021-12-27 21:24:15,296 INFO L226 Difference]: Without dead ends: 138 [2021-12-27 21:24:15,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-27 21:24:15,298 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:24:15,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 146 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:24:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-27 21:24:15,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-12-27 21:24:15,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 134 states have (on average 1.0746268656716418) internal successors, (144), 134 states have internal predecessors, (144), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:24:15,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2021-12-27 21:24:15,306 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 76 [2021-12-27 21:24:15,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:24:15,306 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2021-12-27 21:24:15,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:15,306 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2021-12-27 21:24:15,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-27 21:24:15,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:24:15,308 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:24:15,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-27 21:24:15,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:24:15,526 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:24:15,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:24:15,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2095671533, now seen corresponding path program 6 times [2021-12-27 21:24:15,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:24:15,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997287440] [2021-12-27 21:24:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:24:15,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:24:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:24:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-27 21:24:16,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:24:16,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997287440] [2021-12-27 21:24:16,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997287440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:24:16,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584193434] [2021-12-27 21:24:16,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-27 21:24:16,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:24:16,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:24:16,537 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) [2021-12-27 21:24:16,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 21:24:16,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-27 21:24:16,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:24:16,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-27 21:24:16,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:24:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2021-12-27 21:24:17,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:24:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2021-12-27 21:24:17,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584193434] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:24:17,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:24:17,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 9, 9] total 67 [2021-12-27 21:24:17,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604624558] [2021-12-27 21:24:17,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:24:17,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-27 21:24:17,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:24:17,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-27 21:24:17,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2925, Unknown=0, NotChecked=0, Total=4422 [2021-12-27 21:24:17,528 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 67 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:24:18,636 INFO L93 Difference]: Finished difference Result 200 states and 236 transitions. [2021-12-27 21:24:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-27 21:24:18,637 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-27 21:24:18,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:24:18,638 INFO L225 Difference]: With dead ends: 200 [2021-12-27 21:24:18,638 INFO L226 Difference]: Without dead ends: 165 [2021-12-27 21:24:18,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4914, Invalid=8892, Unknown=0, NotChecked=0, Total=13806 [2021-12-27 21:24:18,641 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 157 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:24:18,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 275 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:24:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-27 21:24:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-12-27 21:24:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.1125) internal successors, (178), 160 states have internal predecessors, (178), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:24:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 182 transitions. [2021-12-27 21:24:18,649 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 182 transitions. Word has length 128 [2021-12-27 21:24:18,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:24:18,650 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 182 transitions. [2021-12-27 21:24:18,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:18,650 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 182 transitions. [2021-12-27 21:24:18,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-27 21:24:18,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:24:18,652 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:24:18,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-27 21:24:18,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:24:18,868 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:24:18,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:24:18,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1928839019, now seen corresponding path program 7 times [2021-12-27 21:24:18,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:24:18,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195021887] [2021-12-27 21:24:18,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:24:18,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:24:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:24:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-12-27 21:24:19,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:24:19,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195021887] [2021-12-27 21:24:19,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195021887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:24:19,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129142170] [2021-12-27 21:24:19,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-27 21:24:19,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:24:19,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:24:19,847 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) [2021-12-27 21:24:19,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-27 21:24:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:24:20,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-27 21:24:20,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:24:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-12-27 21:24:20,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:24:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-12-27 21:24:22,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129142170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:24:22,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:24:22,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2021-12-27 21:24:22,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064135083] [2021-12-27 21:24:22,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:24:22,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-27 21:24:22,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:24:22,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-27 21:24:22,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-12-27 21:24:22,763 INFO L87 Difference]: Start difference. First operand 164 states and 182 transitions. Second operand has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:23,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:24:23,033 INFO L93 Difference]: Finished difference Result 329 states and 417 transitions. [2021-12-27 21:24:23,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-27 21:24:23,035 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-12-27 21:24:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:24:23,036 INFO L225 Difference]: With dead ends: 329 [2021-12-27 21:24:23,036 INFO L226 Difference]: Without dead ends: 270 [2021-12-27 21:24:23,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-12-27 21:24:23,038 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 104 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:24:23,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 122 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:24:23,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-27 21:24:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-12-27 21:24:23,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 266 states have (on average 1.0676691729323309) internal successors, (284), 266 states have internal predecessors, (284), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:24:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 288 transitions. [2021-12-27 21:24:23,052 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 288 transitions. Word has length 154 [2021-12-27 21:24:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:24:23,052 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 288 transitions. [2021-12-27 21:24:23,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:23,052 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 288 transitions. [2021-12-27 21:24:23,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-12-27 21:24:23,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:24:23,054 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:24:23,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-27 21:24:23,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:24:23,255 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:24:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:24:23,256 INFO L85 PathProgramCache]: Analyzing trace with hash -464172929, now seen corresponding path program 8 times [2021-12-27 21:24:23,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:24:23,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622143486] [2021-12-27 21:24:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:24:23,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:24:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:24:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-12-27 21:24:26,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:24:26,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622143486] [2021-12-27 21:24:26,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622143486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:24:26,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531807529] [2021-12-27 21:24:26,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:24:26,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:24:26,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:24:26,500 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) [2021-12-27 21:24:26,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-27 21:24:26,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:24:26,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:24:26,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-27 21:24:26,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:24:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-12-27 21:24:27,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:24:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-12-27 21:24:36,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531807529] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:24:36,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:24:36,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2021-12-27 21:24:36,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240682600] [2021-12-27 21:24:36,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:24:36,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2021-12-27 21:24:36,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:24:36,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2021-12-27 21:24:36,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2021-12-27 21:24:36,323 INFO L87 Difference]: Start difference. First operand 270 states and 288 transitions. Second operand has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:24:36,959 INFO L93 Difference]: Finished difference Result 541 states and 682 transitions. [2021-12-27 21:24:36,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2021-12-27 21:24:36,960 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2021-12-27 21:24:36,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:24:36,961 INFO L225 Difference]: With dead ends: 541 [2021-12-27 21:24:36,961 INFO L226 Difference]: Without dead ends: 482 [2021-12-27 21:24:36,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2021-12-27 21:24:36,965 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 315 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:24:36,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 122 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-27 21:24:36,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-12-27 21:24:36,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2021-12-27 21:24:36,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 478 states have (on average 1.0376569037656904) internal successors, (496), 478 states have internal predecessors, (496), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:24:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 500 transitions. [2021-12-27 21:24:36,976 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 500 transitions. Word has length 260 [2021-12-27 21:24:36,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:24:36,976 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 500 transitions. [2021-12-27 21:24:36,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:24:36,977 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 500 transitions. [2021-12-27 21:24:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2021-12-27 21:24:36,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:24:36,982 INFO L514 BasicCegarLoop]: trace histogram [210, 210, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:24:37,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-27 21:24:37,195 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,SelfDestructingSolverStorable9 [2021-12-27 21:24:37,196 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:24:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:24:37,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1485341997, now seen corresponding path program 9 times [2021-12-27 21:24:37,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:24:37,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898816853] [2021-12-27 21:24:37,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:24:37,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:24:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:24:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-12-27 21:24:49,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:24:49,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898816853] [2021-12-27 21:24:49,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898816853] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:24:49,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328659667] [2021-12-27 21:24:49,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:24:49,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:24:49,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:24:49,330 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) [2021-12-27 21:24:49,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-27 21:24:50,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-27 21:24:50,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:24:50,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-27 21:24:50,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:24:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44100 trivial. 0 not checked. [2021-12-27 21:24:52,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:24:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44100 trivial. 0 not checked. [2021-12-27 21:24:54,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328659667] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:24:54,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:24:54,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [213, 17, 17] total 243 [2021-12-27 21:24:54,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275198359] [2021-12-27 21:24:54,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:24:54,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 243 states [2021-12-27 21:24:54,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:24:54,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 243 interpolants. [2021-12-27 21:24:54,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23073, Invalid=35733, Unknown=0, NotChecked=0, Total=58806 [2021-12-27 21:24:54,011 INFO L87 Difference]: Start difference. First operand 482 states and 500 transitions. Second operand has 243 states, 243 states have (on average 2.1646090534979425) internal successors, (526), 243 states have internal predecessors, (526), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:25:09,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:25:09,060 INFO L93 Difference]: Finished difference Result 592 states and 660 transitions. [2021-12-27 21:25:09,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2021-12-27 21:25:09,064 INFO L78 Accepts]: Start accepts. Automaton has has 243 states, 243 states have (on average 2.1646090534979425) internal successors, (526), 243 states have internal predecessors, (526), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 472 [2021-12-27 21:25:09,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:25:09,066 INFO L225 Difference]: With dead ends: 592 [2021-12-27 21:25:09,066 INFO L226 Difference]: Without dead ends: 533 [2021-12-27 21:25:09,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1366 GetRequests, 914 SyntacticMatches, 0 SemanticMatches, 452 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28455 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=74346, Invalid=131316, Unknown=0, NotChecked=0, Total=205662 [2021-12-27 21:25:09,078 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 785 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-27 21:25:09,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 218 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-27 21:25:09,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-12-27 21:25:09,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 532. [2021-12-27 21:25:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 528 states have (on average 1.0643939393939394) internal successors, (562), 528 states have internal predecessors, (562), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:25:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 566 transitions. [2021-12-27 21:25:09,089 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 566 transitions. Word has length 472 [2021-12-27 21:25:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:25:09,090 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 566 transitions. [2021-12-27 21:25:09,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 243 states, 243 states have (on average 2.1646090534979425) internal successors, (526), 243 states have internal predecessors, (526), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:25:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 566 transitions. [2021-12-27 21:25:09,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2021-12-27 21:25:09,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:25:09,096 INFO L514 BasicCegarLoop]: trace histogram [211, 211, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:25:09,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-27 21:25:09,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:25:09,311 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:25:09,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:25:09,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1444814123, now seen corresponding path program 10 times [2021-12-27 21:25:09,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:25:09,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185427832] [2021-12-27 21:25:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:25:09,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:25:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat