./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-new/half.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/loop-new/half.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 cd8ea842760c1d795b2a0ad721eea8bf94078967bffa91c75f5537bf4a53b968 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 02:42:01,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 02:42:01,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 02:42:01,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 02:42:01,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 02:42:01,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 02:42:01,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 02:42:01,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 02:42:01,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 02:42:01,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 02:42:01,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 02:42:01,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 02:42:01,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 02:42:01,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 02:42:01,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 02:42:01,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 02:42:01,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 02:42:01,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 02:42:01,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 02:42:01,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 02:42:01,061 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 02:42:01,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 02:42:01,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 02:42:01,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 02:42:01,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 02:42:01,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 02:42:01,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 02:42:01,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 02:42:01,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 02:42:01,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 02:42:01,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 02:42:01,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 02:42:01,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 02:42:01,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 02:42:01,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 02:42:01,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 02:42:01,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 02:42:01,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 02:42:01,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 02:42:01,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 02:42:01,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 02:42:01,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 02:42:01,078 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 02:42:01,100 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 02:42:01,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 02:42:01,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 02:42:01,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 02:42:01,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 02:42:01,102 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 02:42:01,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 02:42:01,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 02:42:01,103 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 02:42:01,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 02:42:01,111 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 02:42:01,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 02:42:01,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 02:42:01,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 02:42:01,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 02:42:01,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 02:42:01,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 02:42:01,112 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 02:42:01,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 02:42:01,113 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 02:42:01,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 02:42:01,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 02:42:01,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 02:42:01,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 02:42:01,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:42:01,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 02:42:01,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 02:42:01,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 02:42:01,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 02:42:01,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 02:42:01,115 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 02:42:01,115 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 02:42:01,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 02:42:01,115 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd8ea842760c1d795b2a0ad721eea8bf94078967bffa91c75f5537bf4a53b968 [2022-07-21 02:42:01,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 02:42:01,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 02:42:01,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 02:42:01,412 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 02:42:01,419 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 02:42:01,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/half.i [2022-07-21 02:42:01,470 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ecf417ff/129cfb55e003412eac6a7dd914e68e35/FLAGf596c6b77 [2022-07-21 02:42:01,798 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 02:42:01,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/half.i [2022-07-21 02:42:01,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ecf417ff/129cfb55e003412eac6a7dd914e68e35/FLAGf596c6b77 [2022-07-21 02:42:01,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ecf417ff/129cfb55e003412eac6a7dd914e68e35 [2022-07-21 02:42:01,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 02:42:01,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 02:42:01,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 02:42:01,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 02:42:01,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 02:42:01,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:42:01" (1/1) ... [2022-07-21 02:42:01,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@650e62be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:01, skipping insertion in model container [2022-07-21 02:42:01,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:42:01" (1/1) ... [2022-07-21 02:42:01,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 02:42:01,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 02:42:01,957 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/loop-new/half.i[891,904] [2022-07-21 02:42:01,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:42:01,980 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 02:42:01,990 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/loop-new/half.i[891,904] [2022-07-21 02:42:01,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 02:42:02,018 INFO L208 MainTranslator]: Completed translation [2022-07-21 02:42:02,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:02 WrapperNode [2022-07-21 02:42:02,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 02:42:02,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 02:42:02,033 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 02:42:02,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 02:42:02,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:02" (1/1) ... [2022-07-21 02:42:02,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:02" (1/1) ... [2022-07-21 02:42:02,055 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2022-07-21 02:42:02,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 02:42:02,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 02:42:02,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 02:42:02,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 02:42:02,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:02" (1/1) ... [2022-07-21 02:42:02,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:02" (1/1) ... [2022-07-21 02:42:02,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:02" (1/1) ... [2022-07-21 02:42:02,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:02" (1/1) ... [2022-07-21 02:42:02,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:02" (1/1) ... [2022-07-21 02:42:02,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:02" (1/1) ... [2022-07-21 02:42:02,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:02" (1/1) ... [2022-07-21 02:42:02,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 02:42:02,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 02:42:02,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 02:42:02,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 02:42:02,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:02" (1/1) ... [2022-07-21 02:42:02,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 02:42:02,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:02,104 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) [2022-07-21 02:42:02,127 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 [2022-07-21 02:42:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 02:42:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 02:42:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 02:42:02,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 02:42:02,180 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 02:42:02,181 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 02:42:02,278 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 02:42:02,281 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 02:42:02,282 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 02:42:02,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:42:02 BoogieIcfgContainer [2022-07-21 02:42:02,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 02:42:02,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 02:42:02,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 02:42:02,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 02:42:02,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:42:01" (1/3) ... [2022-07-21 02:42:02,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea81b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:42:02, skipping insertion in model container [2022-07-21 02:42:02,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:02" (2/3) ... [2022-07-21 02:42:02,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea81b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:42:02, skipping insertion in model container [2022-07-21 02:42:02,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:42:02" (3/3) ... [2022-07-21 02:42:02,303 INFO L111 eAbstractionObserver]: Analyzing ICFG half.i [2022-07-21 02:42:02,328 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 02:42:02,328 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 02:42:02,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 02:42:02,384 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@531be972, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4b4017e4 [2022-07-21 02:42:02,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 02:42:02,387 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) [2022-07-21 02:42:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 02:42:02,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:02,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:02,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:02,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:02,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1807274184, now seen corresponding path program 1 times [2022-07-21 02:42:02,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:02,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484818854] [2022-07-21 02:42:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:02,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:02,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:02,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484818854] [2022-07-21 02:42:02,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484818854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:42:02,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:42:02,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 02:42:02,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138615505] [2022-07-21 02:42:02,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:42:02,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 02:42:02,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:02,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 02:42:02,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:42:02,520 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-07-21 02:42:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:02,528 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-07-21 02:42:02,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 02:42:02,530 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-07-21 02:42:02,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:02,535 INFO L225 Difference]: With dead ends: 22 [2022-07-21 02:42:02,535 INFO L226 Difference]: Without dead ends: 10 [2022-07-21 02:42:02,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 02:42:02,546 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:02,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:42:02,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-07-21 02:42:02,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-07-21 02:42:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-07-21 02:42:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-07-21 02:42:02,570 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2022-07-21 02:42:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:02,571 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-07-21 02:42:02,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-07-21 02:42:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-07-21 02:42:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 02:42:02,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:02,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:02,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 02:42:02,573 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:02,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:02,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1806946483, now seen corresponding path program 1 times [2022-07-21 02:42:02,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:02,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053345898] [2022-07-21 02:42:02,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:02,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:02,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:02,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053345898] [2022-07-21 02:42:02,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053345898] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 02:42:02,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 02:42:02,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 02:42:02,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177517313] [2022-07-21 02:42:02,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 02:42:02,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 02:42:02,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:02,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 02:42:02,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 02:42:02,726 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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) [2022-07-21 02:42:02,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:02,795 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-07-21 02:42:02,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 02:42:02,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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 [2022-07-21 02:42:02,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:02,796 INFO L225 Difference]: With dead ends: 21 [2022-07-21 02:42:02,796 INFO L226 Difference]: Without dead ends: 12 [2022-07-21 02:42:02,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-21 02:42:02,797 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:02,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 19 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:42:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-21 02:42:02,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-07-21 02:42:02,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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) [2022-07-21 02:42:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-07-21 02:42:02,800 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2022-07-21 02:42:02,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:02,801 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-07-21 02:42:02,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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) [2022-07-21 02:42:02,801 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-07-21 02:42:02,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 02:42:02,802 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:02,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:02,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 02:42:02,802 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:02,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:02,802 INFO L85 PathProgramCache]: Analyzing trace with hash -838413826, now seen corresponding path program 1 times [2022-07-21 02:42:02,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:02,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547232453] [2022-07-21 02:42:02,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:02,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:02,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:02,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547232453] [2022-07-21 02:42:02,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547232453] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:02,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134484823] [2022-07-21 02:42:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:02,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:02,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:02,923 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) [2022-07-21 02:42:02,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 02:42:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:02,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 02:42:02,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:03,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:03,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134484823] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:03,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:03,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2022-07-21 02:42:03,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635360759] [2022-07-21 02:42:03,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:03,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 02:42:03,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:03,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 02:42:03,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-07-21 02:42:03,067 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2022-07-21 02:42:03,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:03,143 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-07-21 02:42:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 02:42:03,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 10 [2022-07-21 02:42:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:03,144 INFO L225 Difference]: With dead ends: 26 [2022-07-21 02:42:03,144 INFO L226 Difference]: Without dead ends: 22 [2022-07-21 02:42:03,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-07-21 02:42:03,145 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:03,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 27 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 02:42:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-21 02:42:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2022-07-21 02:42:03,148 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) [2022-07-21 02:42:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-07-21 02:42:03,148 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2022-07-21 02:42:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:03,148 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-07-21 02:42:03,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2022-07-21 02:42:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-07-21 02:42:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 02:42:03,149 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:03,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:03,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:03,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:03,365 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:03,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:03,366 INFO L85 PathProgramCache]: Analyzing trace with hash -355206639, now seen corresponding path program 1 times [2022-07-21 02:42:03,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:03,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915630468] [2022-07-21 02:42:03,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:03,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:03,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:03,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915630468] [2022-07-21 02:42:03,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915630468] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:03,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554356793] [2022-07-21 02:42:03,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:03,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:03,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:03,520 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) [2022-07-21 02:42:03,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 02:42:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:03,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 02:42:03,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:03,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:03,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554356793] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:03,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:03,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-07-21 02:42:03,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225182166] [2022-07-21 02:42:03,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:03,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 02:42:03,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:03,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 02:42:03,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-07-21 02:42:03,895 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2022-07-21 02:42:04,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:04,424 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-07-21 02:42:04,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 02:42:04,425 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) Word has length 13 [2022-07-21 02:42:04,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:04,425 INFO L225 Difference]: With dead ends: 41 [2022-07-21 02:42:04,425 INFO L226 Difference]: Without dead ends: 28 [2022-07-21 02:42:04,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 02:42:04,427 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:04,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 37 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:42:04,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-21 02:42:04,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2022-07-21 02:42:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:04,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-21 02:42:04,431 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2022-07-21 02:42:04,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:04,432 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-21 02:42:04,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2022-07-21 02:42:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-21 02:42:04,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 02:42:04,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 02:42:04,433 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 02:42:04,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:04,635 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 [2022-07-21 02:42:04,636 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 02:42:04,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 02:42:04,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1670059902, now seen corresponding path program 2 times [2022-07-21 02:42:04,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 02:42:04,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030092201] [2022-07-21 02:42:04,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 02:42:04,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 02:42:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 02:42:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 02:42:04,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 02:42:04,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030092201] [2022-07-21 02:42:04,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030092201] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 02:42:04,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605386043] [2022-07-21 02:42:04,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 02:42:04,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 02:42:04,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 02:42:04,800 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) [2022-07-21 02:42:04,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 02:42:04,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 02:42:04,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 02:42:04,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 02:42:04,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 02:42:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:04,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 02:42:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 02:42:05,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605386043] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 02:42:05,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 02:42:05,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 32 [2022-07-21 02:42:05,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543531598] [2022-07-21 02:42:05,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 02:42:05,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 02:42:05,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 02:42:05,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 02:42:05,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-07-21 02:42:05,441 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 32 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) [2022-07-21 02:42:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 02:42:05,630 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-07-21 02:42:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 02:42:05,630 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 32 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 22 [2022-07-21 02:42:05,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 02:42:05,630 INFO L225 Difference]: With dead ends: 36 [2022-07-21 02:42:05,630 INFO L226 Difference]: Without dead ends: 0 [2022-07-21 02:42:05,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 02:42:05,632 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 02:42:05,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 18 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 02:42:05,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-21 02:42:05,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-21 02:42:05,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 02:42:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-21 02:42:05,632 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2022-07-21 02:42:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 02:42:05,633 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-21 02:42:05,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 32 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) [2022-07-21 02:42:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-21 02:42:05,633 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-21 02:42:05,635 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 02:42:05,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 02:42:05,851 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 [2022-07-21 02:42:05,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-21 02:42:05,985 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-21 02:42:05,986 INFO L899 garLoopResultBuilder]: For program point L29-2(lines 29 33) no Hoare annotation was computed. [2022-07-21 02:42:05,986 INFO L895 garLoopResultBuilder]: At program point L29-3(lines 29 33) the Hoare annotation is: (let ((.cse10 (* (- 1) |ULTIMATE.start_main_~i~0#1|))) (let ((.cse9 (div (+ (- 2) .cse10) (- 2))) (.cse6 (div (+ (- 1) .cse10) (- 2)))) (let ((.cse4 (+ |ULTIMATE.start_main_~i~0#1| 1)) (.cse5 (* 2 |ULTIMATE.start_main_~k~0#1|)) (.cse7 (<= .cse9 .cse6)) (.cse8 (< .cse9 1))) (let ((.cse0 (or (<= .cse9 (+ |ULTIMATE.start_main_~n~0#1| 1)) .cse7 .cse8)) (.cse1 (or (< |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~n~0#1|) (< .cse4 .cse5))) (.cse2 (or (<= |ULTIMATE.start_main_~n~0#1| .cse6) .cse7 .cse8)) (.cse3 (* 2 |ULTIMATE.start_main_~n~0#1|))) (or (and (= 3 |ULTIMATE.start_main_~i~0#1|) .cse0 .cse1 .cse2) (and .cse0 (<= |ULTIMATE.start_main_~i~0#1| .cse3) .cse1 (<= .cse3 |ULTIMATE.start_main_~i~0#1|) .cse2) (and (<= .cse4 .cse3) (<= .cse3 .cse4) (< |ULTIMATE.start_main_~i~0#1| .cse5))))))) [2022-07-21 02:42:05,986 INFO L899 garLoopResultBuilder]: For program point L29-4(lines 29 33) no Hoare annotation was computed. [2022-07-21 02:42:05,986 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-07-21 02:42:05,986 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-21 02:42:05,986 INFO L899 garLoopResultBuilder]: For program point L30(lines 30 32) no Hoare annotation was computed. [2022-07-21 02:42:05,986 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-21 02:42:05,986 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-21 02:42:05,986 INFO L899 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-07-21 02:42:05,987 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-07-21 02:42:05,987 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-07-21 02:42:05,987 INFO L902 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2022-07-21 02:42:05,987 INFO L902 garLoopResultBuilder]: At program point L35(lines 24 36) the Hoare annotation is: true [2022-07-21 02:42:05,989 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-07-21 02:42:05,991 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 02:42:06,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:42:06 BoogieIcfgContainer [2022-07-21 02:42:06,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 02:42:06,014 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 02:42:06,015 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 02:42:06,015 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 02:42:06,015 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:42:02" (3/4) ... [2022-07-21 02:42:06,017 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-21 02:42:06,024 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2022-07-21 02:42:06,025 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-21 02:42:06,025 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-21 02:42:06,025 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-21 02:42:06,048 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 02:42:06,049 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 02:42:06,049 INFO L158 Benchmark]: Toolchain (without parser) took 4229.52ms. Allocated memory was 62.9MB in the beginning and 109.1MB in the end (delta: 46.1MB). Free memory was 43.4MB in the beginning and 78.7MB in the end (delta: -35.4MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. [2022-07-21 02:42:06,049 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 62.9MB. Free memory is still 45.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:42:06,050 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.27ms. Allocated memory is still 62.9MB. Free memory was 43.2MB in the beginning and 46.8MB in the end (delta: -3.6MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. [2022-07-21 02:42:06,052 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.98ms. Allocated memory is still 62.9MB. Free memory was 46.6MB in the beginning and 45.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 02:42:06,052 INFO L158 Benchmark]: Boogie Preprocessor took 19.36ms. Allocated memory is still 62.9MB. Free memory was 45.3MB in the beginning and 44.3MB in the end (delta: 988.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 02:42:06,053 INFO L158 Benchmark]: RCFGBuilder took 206.82ms. Allocated memory is still 62.9MB. Free memory was 44.3MB in the beginning and 35.6MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-21 02:42:06,053 INFO L158 Benchmark]: TraceAbstraction took 3729.72ms. Allocated memory was 62.9MB in the beginning and 109.1MB in the end (delta: 46.1MB). Free memory was 34.9MB in the beginning and 81.9MB in the end (delta: -47.0MB). Peak memory consumption was 55.1MB. Max. memory is 16.1GB. [2022-07-21 02:42:06,053 INFO L158 Benchmark]: Witness Printer took 34.26ms. Allocated memory is still 109.1MB. Free memory was 81.9MB in the beginning and 78.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 02:42:06,055 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 62.9MB. Free memory is still 45.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 197.27ms. Allocated memory is still 62.9MB. Free memory was 43.2MB in the beginning and 46.8MB in the end (delta: -3.6MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.98ms. Allocated memory is still 62.9MB. Free memory was 46.6MB in the beginning and 45.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.36ms. Allocated memory is still 62.9MB. Free memory was 45.3MB in the beginning and 44.3MB in the end (delta: 988.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 206.82ms. Allocated memory is still 62.9MB. Free memory was 44.3MB in the beginning and 35.6MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 3729.72ms. Allocated memory was 62.9MB in the beginning and 109.1MB in the end (delta: 46.1MB). Free memory was 34.9MB in the beginning and 81.9MB in the end (delta: -47.0MB). Peak memory consumption was 55.1MB. Max. memory is 16.1GB. * Witness Printer took 34.26ms. Allocated memory is still 109.1MB. Free memory was 81.9MB in the beginning and 78.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.6s, OverallIterations: 5, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 103 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 103 mSDsluCounter, 117 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 80 mSDsCounter, 99 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 420 IncrementalHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 99 mSolverCounterUnsat, 37 mSDtfsCounter, 420 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 12 NumberOfFragments, 206 HoareAnnotationTreeSize, 3 FomulaSimplifications, 14 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 542 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 138 ConstructedInterpolants, 0 QuantifiedInterpolants, 2178 SizeOfPredicates, 11 NumberOfNonLiveVariables, 164 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 2/123 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: ((((3 == i && (((-2 + -1 * i) / -2 <= n + 1 || (-2 + -1 * i) / -2 <= (-1 + -1 * i) / -2) || (-2 + -1 * i) / -2 < 1)) && ((k < 0 || k == n) || i + 1 < 2 * k)) && ((n <= (-1 + -1 * i) / -2 || (-2 + -1 * i) / -2 <= (-1 + -1 * i) / -2) || (-2 + -1 * i) / -2 < 1)) || (((((((-2 + -1 * i) / -2 <= n + 1 || (-2 + -1 * i) / -2 <= (-1 + -1 * i) / -2) || (-2 + -1 * i) / -2 < 1) && i <= 2 * n) && ((k < 0 || k == n) || i + 1 < 2 * k)) && 2 * n <= i) && ((n <= (-1 + -1 * i) / -2 || (-2 + -1 * i) / -2 <= (-1 + -1 * i) / -2) || (-2 + -1 * i) / -2 < 1))) || ((i + 1 <= 2 * n && 2 * n <= i + 1) && i < 2 * k) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-07-21 02:42:06,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE