./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_seq_init_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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_seq_init_ground.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eab386bb7401f51a7807d88da5762f33f54a558b2c1945526724b989e81d1d36 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 09:48:46,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 09:48:46,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 09:48:46,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 09:48:46,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 09:48:46,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 09:48:46,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 09:48:46,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 09:48:46,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 09:48:46,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 09:48:46,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 09:48:46,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 09:48:46,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 09:48:46,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 09:48:46,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 09:48:46,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 09:48:46,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 09:48:46,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 09:48:46,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 09:48:46,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 09:48:46,787 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 09:48:46,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 09:48:46,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 09:48:46,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 09:48:46,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 09:48:46,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 09:48:46,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 09:48:46,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 09:48:46,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 09:48:46,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 09:48:46,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 09:48:46,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 09:48:46,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 09:48:46,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 09:48:46,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 09:48:46,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 09:48:46,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 09:48:46,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 09:48:46,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 09:48:46,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 09:48:46,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 09:48:46,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 09:48:46,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 09:48:46,844 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 09:48:46,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 09:48:46,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 09:48:46,845 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 09:48:46,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 09:48:46,846 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 09:48:46,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 09:48:46,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 09:48:46,847 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 09:48:46,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 09:48:46,848 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 09:48:46,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 09:48:46,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 09:48:46,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 09:48:46,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 09:48:46,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 09:48:46,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 09:48:46,849 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 09:48:46,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 09:48:46,851 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 09:48:46,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 09:48:46,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 09:48:46,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 09:48:46,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 09:48:46,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 09:48:46,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 09:48:46,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 09:48:46,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 09:48:46,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 09:48:46,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 09:48:46,853 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 09:48:46,853 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 09:48:46,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 09:48:46,854 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eab386bb7401f51a7807d88da5762f33f54a558b2c1945526724b989e81d1d36 [2022-07-13 09:48:47,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 09:48:47,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 09:48:47,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 09:48:47,144 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 09:48:47,145 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 09:48:47,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_seq_init_ground.i [2022-07-13 09:48:47,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3afdda006/a794c2fdec50453ca87b5bcafa240d87/FLAG8f8d3dc07 [2022-07-13 09:48:47,709 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 09:48:47,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_seq_init_ground.i [2022-07-13 09:48:47,715 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3afdda006/a794c2fdec50453ca87b5bcafa240d87/FLAG8f8d3dc07 [2022-07-13 09:48:48,182 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3afdda006/a794c2fdec50453ca87b5bcafa240d87 [2022-07-13 09:48:48,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 09:48:48,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 09:48:48,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 09:48:48,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 09:48:48,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 09:48:48,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:48:48" (1/1) ... [2022-07-13 09:48:48,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a38e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:48:48, skipping insertion in model container [2022-07-13 09:48:48,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:48:48" (1/1) ... [2022-07-13 09:48:48,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 09:48:48,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 09:48:48,394 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_seq_init_ground.i[817,830] [2022-07-13 09:48:48,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 09:48:48,421 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 09:48:48,437 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_seq_init_ground.i[817,830] [2022-07-13 09:48:48,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 09:48:48,461 INFO L208 MainTranslator]: Completed translation [2022-07-13 09:48:48,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:48:48 WrapperNode [2022-07-13 09:48:48,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 09:48:48,462 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 09:48:48,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 09:48:48,463 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 09:48:48,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:48:48" (1/1) ... [2022-07-13 09:48:48,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:48:48" (1/1) ... [2022-07-13 09:48:48,493 INFO L137 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2022-07-13 09:48:48,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 09:48:48,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 09:48:48,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 09:48:48,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 09:48:48,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:48:48" (1/1) ... [2022-07-13 09:48:48,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:48:48" (1/1) ... [2022-07-13 09:48:48,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:48:48" (1/1) ... [2022-07-13 09:48:48,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:48:48" (1/1) ... [2022-07-13 09:48:48,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:48:48" (1/1) ... [2022-07-13 09:48:48,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:48:48" (1/1) ... [2022-07-13 09:48:48,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:48:48" (1/1) ... [2022-07-13 09:48:48,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 09:48:48,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 09:48:48,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 09:48:48,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 09:48:48,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:48:48" (1/1) ... [2022-07-13 09:48:48,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 09:48:48,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:48:48,573 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) [2022-07-13 09:48:48,598 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 [2022-07-13 09:48:48,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 09:48:48,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 09:48:48,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 09:48:48,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 09:48:48,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 09:48:48,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 09:48:48,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 09:48:48,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 09:48:48,683 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 09:48:48,684 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 09:48:48,802 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 09:48:48,807 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 09:48:48,823 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 09:48:48,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:48:48 BoogieIcfgContainer [2022-07-13 09:48:48,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 09:48:48,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 09:48:48,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 09:48:48,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 09:48:48,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:48:48" (1/3) ... [2022-07-13 09:48:48,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107587f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:48:48, skipping insertion in model container [2022-07-13 09:48:48,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:48:48" (2/3) ... [2022-07-13 09:48:48,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107587f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:48:48, skipping insertion in model container [2022-07-13 09:48:48,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:48:48" (3/3) ... [2022-07-13 09:48:48,832 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_seq_init_ground.i [2022-07-13 09:48:48,854 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 09:48:48,854 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 09:48:48,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 09:48:48,937 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@73bbabec, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5dbcf58f [2022-07-13 09:48:48,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 09:48:48,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:48,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-13 09:48:48,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:48:48,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:48:48,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:48:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:48:48,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1808850128, now seen corresponding path program 1 times [2022-07-13 09:48:48,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:48:48,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108273596] [2022-07-13 09:48:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:48:48,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:48:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:48:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:48:49,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:48:49,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108273596] [2022-07-13 09:48:49,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108273596] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:48:49,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 09:48:49,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 09:48:49,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562548169] [2022-07-13 09:48:49,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:48:49,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 09:48:49,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:48:49,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 09:48:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 09:48:49,228 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:49,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:48:49,262 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2022-07-13 09:48:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 09:48:49,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-13 09:48:49,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:48:49,273 INFO L225 Difference]: With dead ends: 26 [2022-07-13 09:48:49,274 INFO L226 Difference]: Without dead ends: 11 [2022-07-13 09:48:49,276 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 [2022-07-13 09:48:49,283 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 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 [2022-07-13 09:48:49,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:48:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-07-13 09:48:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-07-13 09:48:49,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:49,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-07-13 09:48:49,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2022-07-13 09:48:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:48:49,317 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-07-13 09:48:49,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:49,318 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-07-13 09:48:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 09:48:49,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:48:49,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:48:49,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 09:48:49,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:48:49,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:48:49,331 INFO L85 PathProgramCache]: Analyzing trace with hash 291255051, now seen corresponding path program 1 times [2022-07-13 09:48:49,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:48:49,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199074905] [2022-07-13 09:48:49,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:48:49,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:48:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:48:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:48:49,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:48:49,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199074905] [2022-07-13 09:48:49,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199074905] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:48:49,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635733645] [2022-07-13 09:48:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:48:49,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:48:49,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:48:49,408 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) [2022-07-13 09:48:49,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 09:48:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:48:49,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 09:48:49,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:48:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:48:49,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:48:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:48:49,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635733645] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:48:49,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:48:49,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-13 09:48:49,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965953420] [2022-07-13 09:48:49,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:48:49,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 09:48:49,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:48:49,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 09:48:49,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 09:48:49,535 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:49,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:48:49,551 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-07-13 09:48:49,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 09:48:49,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 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 [2022-07-13 09:48:49,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:48:49,552 INFO L225 Difference]: With dead ends: 21 [2022-07-13 09:48:49,552 INFO L226 Difference]: Without dead ends: 14 [2022-07-13 09:48:49,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 09:48:49,554 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:48:49,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:48:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-07-13 09:48:49,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-07-13 09:48:49,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-07-13 09:48:49,559 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 8 [2022-07-13 09:48:49,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:48:49,559 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-07-13 09:48:49,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:49,560 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-07-13 09:48:49,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 09:48:49,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:48:49,560 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:48:49,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 09:48:49,771 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 [2022-07-13 09:48:49,772 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:48:49,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:48:49,773 INFO L85 PathProgramCache]: Analyzing trace with hash 521278352, now seen corresponding path program 2 times [2022-07-13 09:48:49,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:48:49,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137167730] [2022-07-13 09:48:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:48:49,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:48:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:48:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:48:49,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:48:49,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137167730] [2022-07-13 09:48:49,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137167730] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:48:49,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457134959] [2022-07-13 09:48:49,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:48:49,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:48:49,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:48:49,860 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) [2022-07-13 09:48:49,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 09:48:49,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:48:49,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:48:49,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 09:48:49,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:48:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:48:49,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:48:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:48:50,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457134959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:48:50,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:48:50,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-13 09:48:50,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582666936] [2022-07-13 09:48:50,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:48:50,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 09:48:50,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:48:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 09:48:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-13 09:48:50,072 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:48:50,095 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-07-13 09:48:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 09:48:50,096 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2022-07-13 09:48:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:48:50,096 INFO L225 Difference]: With dead ends: 27 [2022-07-13 09:48:50,097 INFO L226 Difference]: Without dead ends: 20 [2022-07-13 09:48:50,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-13 09:48:50,098 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:48:50,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:48:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-13 09:48:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-13 09:48:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-07-13 09:48:50,104 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 11 [2022-07-13 09:48:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:48:50,104 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-07-13 09:48:50,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-07-13 09:48:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 09:48:50,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:48:50,105 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:48:50,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 09:48:50,318 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,SelfDestructingSolverStorable2 [2022-07-13 09:48:50,319 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:48:50,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:48:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1061727824, now seen corresponding path program 3 times [2022-07-13 09:48:50,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:48:50,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957157558] [2022-07-13 09:48:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:48:50,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:48:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:48:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:48:50,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:48:50,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957157558] [2022-07-13 09:48:50,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957157558] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:48:50,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427105540] [2022-07-13 09:48:50,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 09:48:50,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:48:50,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:48:50,545 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) [2022-07-13 09:48:50,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 09:48:50,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-13 09:48:50,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:48:50,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 09:48:50,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:48:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:48:50,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:48:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:48:50,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427105540] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:48:50,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:48:50,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-13 09:48:50,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508641161] [2022-07-13 09:48:50,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:48:50,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 09:48:50,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:48:50,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 09:48:50,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-13 09:48:50,926 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:50,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:48:50,977 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-07-13 09:48:50,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 09:48:50,978 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2022-07-13 09:48:50,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:48:50,979 INFO L225 Difference]: With dead ends: 39 [2022-07-13 09:48:50,980 INFO L226 Difference]: Without dead ends: 32 [2022-07-13 09:48:50,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-13 09:48:50,982 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:48:50,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:48:50,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-13 09:48:50,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-13 09:48:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:50,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-07-13 09:48:50,998 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 17 [2022-07-13 09:48:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:48:51,002 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-07-13 09:48:51,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:51,004 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-07-13 09:48:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 09:48:51,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:48:51,006 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:48:51,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 09:48:51,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:48:51,220 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:48:51,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:48:51,220 INFO L85 PathProgramCache]: Analyzing trace with hash 265717232, now seen corresponding path program 4 times [2022-07-13 09:48:51,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:48:51,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772287175] [2022-07-13 09:48:51,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:48:51,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:48:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:48:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:48:51,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:48:51,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772287175] [2022-07-13 09:48:51,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772287175] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:48:51,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248752549] [2022-07-13 09:48:51,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 09:48:51,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:48:51,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:48:51,659 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) [2022-07-13 09:48:51,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 09:48:51,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 09:48:51,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:48:51,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 09:48:51,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:48:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:48:51,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:48:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:48:52,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248752549] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:48:52,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:48:52,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-13 09:48:52,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887502087] [2022-07-13 09:48:52,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:48:52,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-13 09:48:52,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:48:52,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-13 09:48:52,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 09:48:52,503 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:52,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:48:52,582 INFO L93 Difference]: Finished difference Result 63 states and 88 transitions. [2022-07-13 09:48:52,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-13 09:48:52,583 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-13 09:48:52,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:48:52,584 INFO L225 Difference]: With dead ends: 63 [2022-07-13 09:48:52,584 INFO L226 Difference]: Without dead ends: 56 [2022-07-13 09:48:52,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 09:48:52,586 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:48:52,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:48:52,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-13 09:48:52,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-07-13 09:48:52,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:52,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-07-13 09:48:52,595 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 29 [2022-07-13 09:48:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:48:52,595 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-07-13 09:48:52,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:48:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-07-13 09:48:52,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 09:48:52,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:48:52,597 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:48:52,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 09:48:52,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:48:52,812 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:48:52,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:48:52,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1684000368, now seen corresponding path program 5 times [2022-07-13 09:48:52,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:48:52,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312242563] [2022-07-13 09:48:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:48:52,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:48:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:48:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:48:53,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:48:53,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312242563] [2022-07-13 09:48:53,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312242563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:48:53,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280066535] [2022-07-13 09:48:53,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 09:48:53,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:48:53,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:48:53,819 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) [2022-07-13 09:48:53,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 09:49:09,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-07-13 09:49:09,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:49:09,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-13 09:49:09,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:49:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:49:09,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:49:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:49:12,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280066535] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:49:12,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:49:12,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-07-13 09:49:12,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401953265] [2022-07-13 09:49:12,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:49:12,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-13 09:49:12,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:49:12,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-13 09:49:12,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-13 09:49:12,079 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:12,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:49:12,260 INFO L93 Difference]: Finished difference Result 111 states and 160 transitions. [2022-07-13 09:49:12,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-13 09:49:12,261 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 0 states have call successors, (0), 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 53 [2022-07-13 09:49:12,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:49:12,264 INFO L225 Difference]: With dead ends: 111 [2022-07-13 09:49:12,264 INFO L226 Difference]: Without dead ends: 104 [2022-07-13 09:49:12,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-13 09:49:12,268 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:49:12,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:49:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-13 09:49:12,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-07-13 09:49:12,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-07-13 09:49:12,292 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 53 [2022-07-13 09:49:12,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:49:12,292 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-07-13 09:49:12,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:49:12,293 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-07-13 09:49:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-13 09:49:12,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:49:12,297 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:49:12,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-13 09:49:12,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:49:12,498 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:49:12,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:49:12,499 INFO L85 PathProgramCache]: Analyzing trace with hash -765599888, now seen corresponding path program 6 times [2022-07-13 09:49:12,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:49:12,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908494533] [2022-07-13 09:49:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:49:12,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:49:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:49:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:49:15,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:49:15,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908494533] [2022-07-13 09:49:15,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908494533] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:49:15,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128947673] [2022-07-13 09:49:15,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 09:49:15,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:49:15,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:49:15,731 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) [2022-07-13 09:49:15,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process