./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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_strcpy_ground-1.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 9957a8257e625ece47db9a92e288c6545c023c8bdaf68d0d314c8d86ce47979a --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:13:43,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:13:43,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:13:43,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:13:43,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:13:43,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:13:43,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:13:43,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:13:43,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:13:43,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:13:43,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:13:43,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:13:43,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:13:43,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:13:43,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:13:43,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:13:43,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:13:43,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:13:43,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:13:43,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:13:43,837 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:13:43,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:13:43,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:13:43,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:13:43,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:13:43,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:13:43,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:13:43,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:13:43,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:13:43,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:13:43,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:13:43,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:13:43,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:13:43,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:13:43,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:13:43,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:13:43,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:13:43,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:13:43,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:13:43,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:13:43,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:13:43,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:13:43,852 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:13:43,871 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:13:43,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:13:43,872 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:13:43,872 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:13:43,873 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:13:43,873 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:13:43,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:13:43,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:13:43,874 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:13:43,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:13:43,874 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:13:43,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:13:43,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:13:43,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:13:43,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:13:43,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:13:43,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:13:43,876 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:13:43,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:13:43,876 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:13:43,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:13:43,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:13:43,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:13:43,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:13:43,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:13:43,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:13:43,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:13:43,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:13:43,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:13:43,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:13:43,878 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:13:43,878 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:13:43,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:13:43,879 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9957a8257e625ece47db9a92e288c6545c023c8bdaf68d0d314c8d86ce47979a [2022-07-19 09:13:44,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:13:44,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:13:44,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:13:44,166 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:13:44,167 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:13:44,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2022-07-19 09:13:44,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/488d2c775/e6feaf314fa2435e8f1404853130b3d7/FLAGabe2bb00c [2022-07-19 09:13:44,661 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:13:44,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2022-07-19 09:13:44,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/488d2c775/e6feaf314fa2435e8f1404853130b3d7/FLAGabe2bb00c [2022-07-19 09:13:45,063 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/488d2c775/e6feaf314fa2435e8f1404853130b3d7 [2022-07-19 09:13:45,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:13:45,066 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:13:45,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:13:45,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:13:45,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:13:45,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:13:45" (1/1) ... [2022-07-19 09:13:45,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f806474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:45, skipping insertion in model container [2022-07-19 09:13:45,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:13:45" (1/1) ... [2022-07-19 09:13:45,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:13:45,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:13:45,268 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_strcpy_ground-1.i[853,866] [2022-07-19 09:13:45,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:13:45,292 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:13:45,305 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_strcpy_ground-1.i[853,866] [2022-07-19 09:13:45,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:13:45,336 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:13:45,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:45 WrapperNode [2022-07-19 09:13:45,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:13:45,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:13:45,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:13:45,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:13:45,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:45" (1/1) ... [2022-07-19 09:13:45,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:45" (1/1) ... [2022-07-19 09:13:45,371 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2022-07-19 09:13:45,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:13:45,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:13:45,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:13:45,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:13:45,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:45" (1/1) ... [2022-07-19 09:13:45,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:45" (1/1) ... [2022-07-19 09:13:45,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:45" (1/1) ... [2022-07-19 09:13:45,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:45" (1/1) ... [2022-07-19 09:13:45,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:45" (1/1) ... [2022-07-19 09:13:45,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:45" (1/1) ... [2022-07-19 09:13:45,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:45" (1/1) ... [2022-07-19 09:13:45,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:13:45,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:13:45,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:13:45,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:13:45,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:45" (1/1) ... [2022-07-19 09:13:45,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:13:45,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:13:45,453 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) [2022-07-19 09:13:45,474 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 [2022-07-19 09:13:45,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:13:45,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:13:45,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 09:13:45,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:13:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:13:45,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:13:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:13:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 09:13:45,551 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:13:45,553 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:13:45,712 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:13:45,740 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:13:45,740 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 09:13:45,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:13:45 BoogieIcfgContainer [2022-07-19 09:13:45,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:13:45,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:13:45,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:13:45,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:13:45,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:13:45" (1/3) ... [2022-07-19 09:13:45,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cee6c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:13:45, skipping insertion in model container [2022-07-19 09:13:45,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:45" (2/3) ... [2022-07-19 09:13:45,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cee6c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:13:45, skipping insertion in model container [2022-07-19 09:13:45,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:13:45" (3/3) ... [2022-07-19 09:13:45,749 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-1.i [2022-07-19 09:13:45,760 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:13:45,760 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:13:45,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:13:45,842 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4383d0c9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@46946f42 [2022-07-19 09:13:45,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:13:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 09:13:45,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:13:45,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:13:45,863 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:13:45,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:13:45,869 INFO L85 PathProgramCache]: Analyzing trace with hash 254868323, now seen corresponding path program 1 times [2022-07-19 09:13:45,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:13:45,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167251711] [2022-07-19 09:13:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:13:45,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:13:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:13:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:13:46,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:13:46,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167251711] [2022-07-19 09:13:46,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167251711] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:13:46,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:13:46,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 09:13:46,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194601577] [2022-07-19 09:13:46,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:13:46,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:13:46,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:13:46,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:13:46,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:13:46,087 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:13:46,110 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2022-07-19 09:13:46,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:13:46,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-19 09:13:46,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:13:46,121 INFO L225 Difference]: With dead ends: 32 [2022-07-19 09:13:46,121 INFO L226 Difference]: Without dead ends: 14 [2022-07-19 09:13:46,124 INFO L412 NwaCegarLoop]: 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 [2022-07-19 09:13:46,128 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:13:46,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:13:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-07-19 09:13:46,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-07-19 09:13:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-07-19 09:13:46,159 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2022-07-19 09:13:46,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:13:46,160 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-07-19 09:13:46,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:46,161 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-07-19 09:13:46,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 09:13:46,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:13:46,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:13:46,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:13:46,163 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:13:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:13:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash -743314847, now seen corresponding path program 1 times [2022-07-19 09:13:46,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:13:46,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644847845] [2022-07-19 09:13:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:13:46,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:13:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:13:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:13:46,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:13:46,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644847845] [2022-07-19 09:13:46,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644847845] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:13:46,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914131786] [2022-07-19 09:13:46,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:13:46,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:13:46,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:13:46,252 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) [2022-07-19 09:13:46,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 09:13:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:13:46,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 09:13:46,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:13:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:13:46,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:13:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:13:46,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914131786] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:13:46,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:13:46,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 09:13:46,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447482870] [2022-07-19 09:13:46,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:13:46,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 09:13:46,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:13:46,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 09:13:46,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 09:13:46,376 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:46,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:13:46,391 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-07-19 09:13:46,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 09:13:46,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 09:13:46,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:13:46,392 INFO L225 Difference]: With dead ends: 27 [2022-07-19 09:13:46,392 INFO L226 Difference]: Without dead ends: 17 [2022-07-19 09:13:46,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 09:13:46,394 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:13:46,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:13:46,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-19 09:13:46,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-19 09:13:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-07-19 09:13:46,398 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2022-07-19 09:13:46,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:13:46,399 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-07-19 09:13:46,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:46,399 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-07-19 09:13:46,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 09:13:46,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:13:46,400 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:13:46,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 09:13:46,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:13:46,612 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:13:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:13:46,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1408008124, now seen corresponding path program 2 times [2022-07-19 09:13:46,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:13:46,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63852812] [2022-07-19 09:13:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:13:46,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:13:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:13:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 09:13:46,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:13:46,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63852812] [2022-07-19 09:13:46,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63852812] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:13:46,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:13:46,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 09:13:46,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001795094] [2022-07-19 09:13:46,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:13:46,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 09:13:46,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:13:46,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 09:13:46,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 09:13:46,708 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:46,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:13:46,733 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-07-19 09:13:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 09:13:46,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 09:13:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:13:46,735 INFO L225 Difference]: With dead ends: 28 [2022-07-19 09:13:46,735 INFO L226 Difference]: Without dead ends: 20 [2022-07-19 09:13:46,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 09:13:46,736 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:13:46,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:13:46,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-19 09:13:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-19 09:13:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-07-19 09:13:46,741 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2022-07-19 09:13:46,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:13:46,741 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-07-19 09:13:46,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-07-19 09:13:46,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 09:13:46,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:13:46,742 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:13:46,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 09:13:46,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:13:46,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:13:46,743 INFO L85 PathProgramCache]: Analyzing trace with hash -506219954, now seen corresponding path program 1 times [2022-07-19 09:13:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:13:46,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460449608] [2022-07-19 09:13:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:13:46,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:13:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:13:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:13:46,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:13:46,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460449608] [2022-07-19 09:13:46,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460449608] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:13:46,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989606956] [2022-07-19 09:13:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:13:46,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:13:46,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:13:46,841 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) [2022-07-19 09:13:46,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 09:13:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:13:46,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 09:13:46,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:13:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:13:46,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:13:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:13:46,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989606956] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:13:46,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:13:46,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-19 09:13:46,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259990873] [2022-07-19 09:13:46,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:13:46,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 09:13:46,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:13:46,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 09:13:46,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:13:46,973 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:46,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:13:46,994 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-07-19 09:13:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 09:13:46,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-19 09:13:46,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:13:46,995 INFO L225 Difference]: With dead ends: 39 [2022-07-19 09:13:46,996 INFO L226 Difference]: Without dead ends: 26 [2022-07-19 09:13:46,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:13:46,997 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:13:46,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:13:46,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-19 09:13:47,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-19 09:13:47,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:47,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-19 09:13:47,002 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-07-19 09:13:47,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:13:47,003 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-19 09:13:47,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:47,003 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-19 09:13:47,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 09:13:47,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:13:47,004 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:13:47,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 09:13:47,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 09:13:47,228 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:13:47,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:13:47,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1390008430, now seen corresponding path program 2 times [2022-07-19 09:13:47,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:13:47,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680156509] [2022-07-19 09:13:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:13:47,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:13:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:13:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:13:47,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:13:47,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680156509] [2022-07-19 09:13:47,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680156509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:13:47,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397264538] [2022-07-19 09:13:47,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:13:47,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:13:47,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:13:47,401 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) [2022-07-19 09:13:47,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 09:13:47,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:13:47,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:13:47,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 09:13:47,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:13:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:13:47,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:13:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:13:47,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397264538] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:13:47,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:13:47,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-19 09:13:47,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534035796] [2022-07-19 09:13:47,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:13:47,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 09:13:47,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:13:47,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 09:13:47,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:13:47,769 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:47,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:13:47,831 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2022-07-19 09:13:47,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 09:13:47,832 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-19 09:13:47,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:13:47,833 INFO L225 Difference]: With dead ends: 51 [2022-07-19 09:13:47,833 INFO L226 Difference]: Without dead ends: 38 [2022-07-19 09:13:47,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:13:47,834 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:13:47,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:13:47,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-19 09:13:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-19 09:13:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-07-19 09:13:47,840 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 23 [2022-07-19 09:13:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:13:47,841 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-07-19 09:13:47,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-07-19 09:13:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 09:13:47,842 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:13:47,842 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:13:47,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 09:13:48,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:13:48,066 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:13:48,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:13:48,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1940857682, now seen corresponding path program 3 times [2022-07-19 09:13:48,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:13:48,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377691801] [2022-07-19 09:13:48,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:13:48,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:13:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:13:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:13:48,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:13:48,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377691801] [2022-07-19 09:13:48,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377691801] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:13:48,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525787239] [2022-07-19 09:13:48,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:13:48,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:13:48,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:13:48,504 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) [2022-07-19 09:13:48,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 09:13:48,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 09:13:48,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:13:48,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 09:13:48,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:13:48,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 09:13:48,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2022-07-19 09:13:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-19 09:13:48,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:13:49,038 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:13:49,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-07-19 09:13:49,056 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-07-19 09:13:49,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2022-07-19 09:13:49,081 INFO L356 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-07-19 09:13:49,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 90 [2022-07-19 09:13:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-19 09:13:49,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525787239] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:13:49,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:13:49,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 32 [2022-07-19 09:13:49,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814355738] [2022-07-19 09:13:49,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:13:49,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 09:13:49,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:13:49,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 09:13:49,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=673, Unknown=0, NotChecked=0, Total=992 [2022-07-19 09:13:49,317 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:13:49,899 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-07-19 09:13:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 09:13:49,900 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-19 09:13:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:13:49,900 INFO L225 Difference]: With dead ends: 57 [2022-07-19 09:13:49,901 INFO L226 Difference]: Without dead ends: 44 [2022-07-19 09:13:49,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=953, Invalid=2239, Unknown=0, NotChecked=0, Total=3192 [2022-07-19 09:13:49,903 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:13:49,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 83 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:13:49,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-19 09:13:49,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2022-07-19 09:13:49,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:49,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-07-19 09:13:49,910 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35 [2022-07-19 09:13:49,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:13:49,911 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-07-19 09:13:49,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:49,911 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-07-19 09:13:49,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 09:13:49,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:13:49,912 INFO L195 NwaCegarLoop]: trace histogram [23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:13:49,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 09:13:50,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:13:50,118 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:13:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:13:50,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1181345695, now seen corresponding path program 1 times [2022-07-19 09:13:50,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:13:50,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570000895] [2022-07-19 09:13:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:13:50,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:13:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:13:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 09:13:50,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:13:50,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570000895] [2022-07-19 09:13:50,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570000895] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:13:50,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929848678] [2022-07-19 09:13:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:13:50,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:13:50,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:13:50,539 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) [2022-07-19 09:13:50,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 09:13:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:13:50,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 09:13:50,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:13:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 09:13:50,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:13:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 09:13:51,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929848678] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:13:51,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:13:51,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-07-19 09:13:51,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656277194] [2022-07-19 09:13:51,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:13:51,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-19 09:13:51,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:13:51,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-19 09:13:51,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 09:13:51,400 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 51 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:51,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:13:51,485 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2022-07-19 09:13:51,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-19 09:13:51,485 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-19 09:13:51,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:13:51,488 INFO L225 Difference]: With dead ends: 81 [2022-07-19 09:13:51,488 INFO L226 Difference]: Without dead ends: 66 [2022-07-19 09:13:51,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 09:13:51,490 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:13:51,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:13:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-19 09:13:51,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-19 09:13:51,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-07-19 09:13:51,512 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 40 [2022-07-19 09:13:51,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:13:51,513 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-07-19 09:13:51,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:51,513 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-07-19 09:13:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 09:13:51,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:13:51,515 INFO L195 NwaCegarLoop]: trace histogram [48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:13:51,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 09:13:51,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:13:51,732 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:13:51,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:13:51,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1792281924, now seen corresponding path program 2 times [2022-07-19 09:13:51,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:13:51,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280198986] [2022-07-19 09:13:51,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:13:51,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:13:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:13:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 09:13:52,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:13:52,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280198986] [2022-07-19 09:13:52,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280198986] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:13:52,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652286642] [2022-07-19 09:13:52,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:13:52,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:13:52,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:13:52,695 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) [2022-07-19 09:13:52,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 09:13:52,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:13:52,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:13:52,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-19 09:13:52,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:13:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 09:13:52,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:13:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 09:13:55,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652286642] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:13:55,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:13:55,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2022-07-19 09:13:55,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284038371] [2022-07-19 09:13:55,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:13:55,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-07-19 09:13:55,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:13:55,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-07-19 09:13:55,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2022-07-19 09:13:55,387 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 101 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 101 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:55,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:13:55,586 INFO L93 Difference]: Finished difference Result 131 states and 188 transitions. [2022-07-19 09:13:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-19 09:13:55,587 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 101 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-19 09:13:55,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:13:55,590 INFO L225 Difference]: With dead ends: 131 [2022-07-19 09:13:55,591 INFO L226 Difference]: Without dead ends: 116 [2022-07-19 09:13:55,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2022-07-19 09:13:55,594 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:13:55,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:13:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-19 09:13:55,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-07-19 09:13:55,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-07-19 09:13:55,619 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 65 [2022-07-19 09:13:55,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:13:55,619 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-07-19 09:13:55,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 101 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:13:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-07-19 09:13:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-19 09:13:55,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:13:55,621 INFO L195 NwaCegarLoop]: trace histogram [98, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:13:55,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 09:13:55,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:13:55,828 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:13:55,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:13:55,828 INFO L85 PathProgramCache]: Analyzing trace with hash -442421852, now seen corresponding path program 3 times [2022-07-19 09:13:55,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:13:55,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359282897] [2022-07-19 09:13:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:13:55,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:13:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:13:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4856 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 09:13:59,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:13:59,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359282897] [2022-07-19 09:13:59,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359282897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:13:59,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040952083] [2022-07-19 09:13:59,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:13:59,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:13:59,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:13:59,115 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) [2022-07-19 09:13:59,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 09:13:59,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 09:13:59,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:13:59,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 09:13:59,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:13:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4856 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2022-07-19 09:13:59,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:13:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4856 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2022-07-19 09:13:59,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040952083] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:13:59,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:13:59,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 6, 6] total 107 [2022-07-19 09:13:59,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886427557] [2022-07-19 09:13:59,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:13:59,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-19 09:13:59,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:13:59,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-19 09:13:59,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6272, Unknown=0, NotChecked=0, Total=11342 [2022-07-19 09:13:59,730 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 107 states, 107 states have (on average 1.2429906542056075) internal successors, (133), 107 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:14:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:14:03,385 INFO L93 Difference]: Finished difference Result 141 states and 151 transitions. [2022-07-19 09:14:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-19 09:14:03,385 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.2429906542056075) internal successors, (133), 107 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-07-19 09:14:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:14:03,386 INFO L225 Difference]: With dead ends: 141 [2022-07-19 09:14:03,386 INFO L226 Difference]: Without dead ends: 120 [2022-07-19 09:14:03,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5547 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=15267, Invalid=26963, Unknown=0, NotChecked=0, Total=42230 [2022-07-19 09:14:03,393 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:14:03,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 63 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:14:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-19 09:14:03,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-19 09:14:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.050420168067227) internal successors, (125), 119 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:14:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2022-07-19 09:14:03,408 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 115 [2022-07-19 09:14:03,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:14:03,409 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2022-07-19 09:14:03,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.2429906542056075) internal successors, (133), 107 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:14:03,409 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2022-07-19 09:14:03,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-19 09:14:03,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:14:03,419 INFO L195 NwaCegarLoop]: trace histogram [99, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:14:03,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 09:14:03,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:14:03,633 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:14:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:14:03,633 INFO L85 PathProgramCache]: Analyzing trace with hash -784496137, now seen corresponding path program 4 times [2022-07-19 09:14:03,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:14:03,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165661650] [2022-07-19 09:14:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:14:03,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:14:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:14:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 09:14:06,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:14:06,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165661650] [2022-07-19 09:14:06,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165661650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:14:06,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196388715] [2022-07-19 09:14:06,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:14:06,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:14:06,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:14:06,908 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) [2022-07-19 09:14:06,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 09:14:07,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:14:07,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:14:07,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-19 09:14:07,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:14:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 09:14:07,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:14:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 09:14:16,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196388715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:14:16,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:14:16,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2022-07-19 09:14:16,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727099188] [2022-07-19 09:14:16,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:14:16,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-07-19 09:14:16,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:14:16,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-07-19 09:14:16,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2022-07-19 09:14:16,405 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 203 states, 203 states have (on average 1.064039408866995) internal successors, (216), 203 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:14:16,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:14:16,749 INFO L93 Difference]: Finished difference Result 239 states and 349 transitions. [2022-07-19 09:14:16,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-07-19 09:14:16,749 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.064039408866995) internal successors, (216), 203 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-07-19 09:14:16,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:14:16,751 INFO L225 Difference]: With dead ends: 239 [2022-07-19 09:14:16,751 INFO L226 Difference]: Without dead ends: 221 [2022-07-19 09:14:16,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2022-07-19 09:14:16,754 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:14:16,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:14:16,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-19 09:14:16,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-07-19 09:14:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0272727272727273) internal successors, (226), 220 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:14:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 226 transitions. [2022-07-19 09:14:16,771 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 226 transitions. Word has length 119 [2022-07-19 09:14:16,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:14:16,771 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 226 transitions. [2022-07-19 09:14:16,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.064039408866995) internal successors, (216), 203 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:14:16,772 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 226 transitions. [2022-07-19 09:14:16,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-07-19 09:14:16,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:14:16,774 INFO L195 NwaCegarLoop]: trace histogram [200, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:14:16,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 09:14:16,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 09:14:16,988 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:14:16,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:14:16,988 INFO L85 PathProgramCache]: Analyzing trace with hash -12073614, now seen corresponding path program 5 times [2022-07-19 09:14:16,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:14:16,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776348925] [2022-07-19 09:14:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:14:16,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:14:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:14:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20111 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 09:14:29,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:14:29,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776348925] [2022-07-19 09:14:29,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776348925] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:14:29,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384192335] [2022-07-19 09:14:29,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:14:29,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:14:29,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:14:29,508 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) [2022-07-19 09:14:29,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process