./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1250.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/float-newlib/float_req_bl_1250.c -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 b1947c2cfa9d661d99206b001fd8998d6aae9b547d6aa58efd3f1b0fdfd07645 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 07:53:34,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 07:53:34,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 07:53:35,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 07:53:35,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 07:53:35,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 07:53:35,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 07:53:35,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 07:53:35,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 07:53:35,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 07:53:35,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 07:53:35,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 07:53:35,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 07:53:35,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 07:53:35,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 07:53:35,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 07:53:35,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 07:53:35,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 07:53:35,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 07:53:35,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 07:53:35,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 07:53:35,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 07:53:35,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 07:53:35,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 07:53:35,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 07:53:35,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 07:53:35,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 07:53:35,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 07:53:35,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 07:53:35,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 07:53:35,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 07:53:35,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 07:53:35,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 07:53:35,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 07:53:35,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 07:53:35,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 07:53:35,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 07:53:35,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 07:53:35,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 07:53:35,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 07:53:35,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 07:53:35,064 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 07:53:35,088 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 07:53:35,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 07:53:35,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 07:53:35,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 07:53:35,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 07:53:35,090 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 07:53:35,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 07:53:35,091 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 07:53:35,091 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 07:53:35,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 07:53:35,092 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 07:53:35,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 07:53:35,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 07:53:35,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 07:53:35,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 07:53:35,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 07:53:35,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 07:53:35,093 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 07:53:35,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 07:53:35,093 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 07:53:35,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 07:53:35,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 07:53:35,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 07:53:35,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 07:53:35,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 07:53:35,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 07:53:35,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 07:53:35,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 07:53:35,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 07:53:35,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 07:53:35,096 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 07:53:35,096 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 07:53:35,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 07:53:35,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 07:53:35,096 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1947c2cfa9d661d99206b001fd8998d6aae9b547d6aa58efd3f1b0fdfd07645 [2021-12-17 07:53:35,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 07:53:35,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 07:53:35,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 07:53:35,331 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 07:53:35,331 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 07:53:35,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2021-12-17 07:53:35,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16db6d561/d249a23142d9413dbf43ed5c5c708701/FLAG59e30cf0c [2021-12-17 07:53:35,767 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 07:53:35,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2021-12-17 07:53:35,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16db6d561/d249a23142d9413dbf43ed5c5c708701/FLAG59e30cf0c [2021-12-17 07:53:35,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16db6d561/d249a23142d9413dbf43ed5c5c708701 [2021-12-17 07:53:35,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 07:53:35,790 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 07:53:35,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 07:53:35,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 07:53:35,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 07:53:35,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:53:35" (1/1) ... [2021-12-17 07:53:35,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60484bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:35, skipping insertion in model container [2021-12-17 07:53:35,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:53:35" (1/1) ... [2021-12-17 07:53:35,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 07:53:35,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 07:53:35,964 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/float-newlib/float_req_bl_1250.c[1719,1732] [2021-12-17 07:53:35,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 07:53:35,972 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 07:53:36,004 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/float-newlib/float_req_bl_1250.c[1719,1732] [2021-12-17 07:53:36,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 07:53:36,018 INFO L208 MainTranslator]: Completed translation [2021-12-17 07:53:36,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:36 WrapperNode [2021-12-17 07:53:36,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 07:53:36,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 07:53:36,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 07:53:36,020 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 07:53:36,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:36" (1/1) ... [2021-12-17 07:53:36,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:36" (1/1) ... [2021-12-17 07:53:36,052 INFO L137 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 50 [2021-12-17 07:53:36,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 07:53:36,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 07:53:36,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 07:53:36,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 07:53:36,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:36" (1/1) ... [2021-12-17 07:53:36,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:36" (1/1) ... [2021-12-17 07:53:36,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:36" (1/1) ... [2021-12-17 07:53:36,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:36" (1/1) ... [2021-12-17 07:53:36,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:36" (1/1) ... [2021-12-17 07:53:36,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:36" (1/1) ... [2021-12-17 07:53:36,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:36" (1/1) ... [2021-12-17 07:53:36,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 07:53:36,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 07:53:36,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 07:53:36,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 07:53:36,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:36" (1/1) ... [2021-12-17 07:53:36,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 07:53:36,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 07:53:36,139 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 07:53:36,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 07:53:36,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 07:53:36,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 07:53:36,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 07:53:36,167 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-12-17 07:53:36,167 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-12-17 07:53:36,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-12-17 07:53:36,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 07:53:36,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 07:53:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 07:53:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 07:53:36,224 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 07:53:36,225 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 07:53:36,408 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 07:53:36,425 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 07:53:36,425 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 07:53:36,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:53:36 BoogieIcfgContainer [2021-12-17 07:53:36,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 07:53:36,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 07:53:36,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 07:53:36,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 07:53:36,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 07:53:35" (1/3) ... [2021-12-17 07:53:36,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad65b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:53:36, skipping insertion in model container [2021-12-17 07:53:36,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:36" (2/3) ... [2021-12-17 07:53:36,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad65b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:53:36, skipping insertion in model container [2021-12-17 07:53:36,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:53:36" (3/3) ... [2021-12-17 07:53:36,432 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1250.c [2021-12-17 07:53:36,436 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 07:53:36,436 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 07:53:36,496 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 07:53:36,504 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 07:53:36,504 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 07:53:36,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 07:53:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 07:53:36,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:36,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:36,529 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:36,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1232868241, now seen corresponding path program 1 times [2021-12-17 07:53:36,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:53:36,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155083242] [2021-12-17 07:53:36,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:36,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:53:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:36,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 07:53:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:53:36,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:53:36,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155083242] [2021-12-17 07:53:36,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155083242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:36,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:36,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 07:53:36,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947836704] [2021-12-17 07:53:36,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:36,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 07:53:36,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:53:36,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 07:53:36,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 07:53:36,739 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:36,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:36,771 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2021-12-17 07:53:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 07:53:36,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-17 07:53:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:36,781 INFO L225 Difference]: With dead ends: 51 [2021-12-17 07:53:36,781 INFO L226 Difference]: Without dead ends: 24 [2021-12-17 07:53:36,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 07:53:36,786 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:53:36,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 07:53:36,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-17 07:53:36,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-17 07:53:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 07:53:36,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2021-12-17 07:53:36,815 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2021-12-17 07:53:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:36,815 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2021-12-17 07:53:36,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:36,816 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2021-12-17 07:53:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 07:53:36,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:36,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:36,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 07:53:36,817 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:36,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:36,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1566908876, now seen corresponding path program 1 times [2021-12-17 07:53:36,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:53:36,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510575405] [2021-12-17 07:53:36,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:36,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:53:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:36,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 07:53:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:53:36,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:53:36,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510575405] [2021-12-17 07:53:36,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510575405] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:36,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:36,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 07:53:36,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309217342] [2021-12-17 07:53:36,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:36,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 07:53:36,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:53:36,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 07:53:36,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 07:53:36,934 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:36,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:36,955 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-12-17 07:53:36,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 07:53:36,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-17 07:53:36,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:36,957 INFO L225 Difference]: With dead ends: 33 [2021-12-17 07:53:36,957 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 07:53:36,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 07:53:36,958 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:53:36,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 101 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 07:53:36,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 07:53:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-17 07:53:36,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 07:53:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2021-12-17 07:53:36,964 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2021-12-17 07:53:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:36,965 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2021-12-17 07:53:36,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2021-12-17 07:53:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 07:53:36,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:36,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:36,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 07:53:36,966 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:36,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:36,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1928564788, now seen corresponding path program 1 times [2021-12-17 07:53:36,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:53:36,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339597333] [2021-12-17 07:53:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:36,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:53:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:37,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 07:53:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:53:37,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:53:37,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339597333] [2021-12-17 07:53:37,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339597333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:37,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:37,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 07:53:37,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589113091] [2021-12-17 07:53:37,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:37,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 07:53:37,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:53:37,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 07:53:37,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 07:53:37,040 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:37,069 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-12-17 07:53:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 07:53:37,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-17 07:53:37,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:37,071 INFO L225 Difference]: With dead ends: 37 [2021-12-17 07:53:37,071 INFO L226 Difference]: Without dead ends: 32 [2021-12-17 07:53:37,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 07:53:37,074 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:53:37,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 117 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 07:53:37,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-17 07:53:37,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-12-17 07:53:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 07:53:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2021-12-17 07:53:37,084 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 16 [2021-12-17 07:53:37,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:37,084 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2021-12-17 07:53:37,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:37,085 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2021-12-17 07:53:37,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-17 07:53:37,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:37,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:37,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 07:53:37,087 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:37,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:37,089 INFO L85 PathProgramCache]: Analyzing trace with hash -20784584, now seen corresponding path program 1 times [2021-12-17 07:53:37,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:53:37,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970293262] [2021-12-17 07:53:37,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:37,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:53:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:37,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 07:53:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:53:37,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:53:37,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970293262] [2021-12-17 07:53:37,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970293262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:37,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:37,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 07:53:37,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445100114] [2021-12-17 07:53:37,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:37,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 07:53:37,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:53:37,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 07:53:37,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 07:53:37,173 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:37,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:37,191 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-12-17 07:53:37,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 07:53:37,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-17 07:53:37,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:37,193 INFO L225 Difference]: With dead ends: 37 [2021-12-17 07:53:37,193 INFO L226 Difference]: Without dead ends: 32 [2021-12-17 07:53:37,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 07:53:37,194 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:53:37,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 117 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 07:53:37,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-17 07:53:37,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-12-17 07:53:37,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 07:53:37,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2021-12-17 07:53:37,198 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 17 [2021-12-17 07:53:37,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:37,199 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2021-12-17 07:53:37,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:37,199 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2021-12-17 07:53:37,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 07:53:37,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:37,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:37,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 07:53:37,200 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1039043768, now seen corresponding path program 1 times [2021-12-17 07:53:37,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:53:37,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578719638] [2021-12-17 07:53:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:37,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:53:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:37,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 07:53:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:53:37,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:53:37,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578719638] [2021-12-17 07:53:37,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578719638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:37,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:37,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 07:53:37,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120936652] [2021-12-17 07:53:37,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:37,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 07:53:37,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:53:37,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 07:53:37,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 07:53:37,255 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:37,273 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-12-17 07:53:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 07:53:37,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-17 07:53:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:37,274 INFO L225 Difference]: With dead ends: 37 [2021-12-17 07:53:37,274 INFO L226 Difference]: Without dead ends: 32 [2021-12-17 07:53:37,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 07:53:37,275 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:53:37,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 117 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 07:53:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-17 07:53:37,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-12-17 07:53:37,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 07:53:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2021-12-17 07:53:37,280 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 18 [2021-12-17 07:53:37,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:37,280 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2021-12-17 07:53:37,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:37,280 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2021-12-17 07:53:37,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 07:53:37,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:37,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:37,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 07:53:37,292 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:37,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:37,292 INFO L85 PathProgramCache]: Analyzing trace with hash -768410695, now seen corresponding path program 1 times [2021-12-17 07:53:37,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:53:37,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324149041] [2021-12-17 07:53:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:37,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:53:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 07:53:37,320 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 07:53:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 07:53:37,350 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 07:53:37,351 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 07:53:37,351 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 07:53:37,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 07:53:37,363 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-12-17 07:53:37,365 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 07:53:37,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 07:53:37 BoogieIcfgContainer [2021-12-17 07:53:37,387 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 07:53:37,388 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 07:53:37,388 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 07:53:37,388 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 07:53:37,388 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:53:36" (3/4) ... [2021-12-17 07:53:37,402 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-17 07:53:37,402 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 07:53:37,403 INFO L158 Benchmark]: Toolchain (without parser) took 1612.33ms. Allocated memory was 132.1MB in the beginning and 184.5MB in the end (delta: 52.4MB). Free memory was 105.2MB in the beginning and 139.4MB in the end (delta: -34.1MB). Peak memory consumption was 18.3MB. Max. memory is 16.1GB. [2021-12-17 07:53:37,403 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 92.3MB. Free memory is still 53.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 07:53:37,403 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.18ms. Allocated memory is still 132.1MB. Free memory was 105.2MB in the beginning and 104.3MB in the end (delta: 885.7kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 07:53:37,403 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.52ms. Allocated memory is still 132.1MB. Free memory was 104.3MB in the beginning and 102.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 07:53:37,404 INFO L158 Benchmark]: Boogie Preprocessor took 39.97ms. Allocated memory is still 132.1MB. Free memory was 102.8MB in the beginning and 101.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 07:53:37,404 INFO L158 Benchmark]: RCFGBuilder took 333.00ms. Allocated memory is still 132.1MB. Free memory was 101.7MB in the beginning and 90.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 07:53:37,404 INFO L158 Benchmark]: TraceAbstraction took 959.87ms. Allocated memory was 132.1MB in the beginning and 184.5MB in the end (delta: 52.4MB). Free memory was 89.7MB in the beginning and 140.4MB in the end (delta: -50.7MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. [2021-12-17 07:53:37,405 INFO L158 Benchmark]: Witness Printer took 14.55ms. Allocated memory is still 184.5MB. Free memory was 140.4MB in the beginning and 139.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 07:53:37,406 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 92.3MB. Free memory is still 53.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.18ms. Allocated memory is still 132.1MB. Free memory was 105.2MB in the beginning and 104.3MB in the end (delta: 885.7kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.52ms. Allocated memory is still 132.1MB. Free memory was 104.3MB in the beginning and 102.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.97ms. Allocated memory is still 132.1MB. Free memory was 102.8MB in the beginning and 101.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 333.00ms. Allocated memory is still 132.1MB. Free memory was 101.7MB in the beginning and 90.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 959.87ms. Allocated memory was 132.1MB in the beginning and 184.5MB in the end (delta: 52.4MB). Free memory was 89.7MB in the beginning and 140.4MB in the end (delta: -50.7MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. * Witness Printer took 14.55ms. Allocated memory is still 184.5MB. Free memory was 140.4MB in the beginning and 139.4MB in the end (delta: 1.0MB). There was no memory consumed. 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 - UnprovableResult [Line: 67]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 56, overapproximation of someBinaryArithmeticFLOAToperation at line 62. Possible FailurePath: [L62] float x = 0.0f / 0.0f; [L63] float y = 0.0f / 0.0f; [L64] CALL, EXPR fmax_float(x, y) [L45] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=4286578690] [L22] __uint32_t w; VAL [\old(x)=4286578690, x=4286578690] [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (w) = gf_u.word [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) VAL [\old(x)=4286578690, w=4286578689, x=4286578690] [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) VAL [\old(x)=4286578690, w=4286578689, x=4286578690] [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) VAL [\old(x)=4286578690, w=4286578689, x=4286578690] [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; VAL [\old(x)=4286578690, \result=0, w=4286578689, x=4286578690] [L45] RET, EXPR __fpclassify_float(x) VAL [\old(x)=4286578690, \old(y)=4286578691, __fpclassify_float(x)=0, x=4286578690, y=4286578691] [L45] COND TRUE __fpclassify_float(x) == 0 [L46] return y; VAL [\old(x)=4286578690, \old(y)=4286578691, \result=4286578691, x=4286578690, y=4286578691] [L64] RET, EXPR fmax_float(x, y) [L64] float res = fmax_float(x, y); [L66] CALL, EXPR isnan_float(res) [L56] return x != x; VAL [\old(x)=4286578691, \result=0, x=4286578691] [L66] RET, EXPR isnan_float(res) [L66] COND TRUE !isnan_float(res) [L67] reach_error() VAL [res=4286578691, x=4286578690, y=4286578691] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5 mSDsluCounter, 514 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 354 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 82 IncrementalHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 160 mSDtfsCounter, 82 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=2, InterpolantAutomatonStates: 23, 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, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 191 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-17 07:53:37,464 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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/float-newlib/float_req_bl_1250.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 b1947c2cfa9d661d99206b001fd8998d6aae9b547d6aa58efd3f1b0fdfd07645 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 07:53:39,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 07:53:39,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 07:53:39,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 07:53:39,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 07:53:39,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 07:53:39,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 07:53:39,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 07:53:39,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 07:53:39,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 07:53:39,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 07:53:39,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 07:53:39,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 07:53:39,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 07:53:39,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 07:53:39,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 07:53:39,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 07:53:39,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 07:53:39,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 07:53:39,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 07:53:39,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 07:53:39,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 07:53:39,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 07:53:39,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 07:53:39,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 07:53:39,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 07:53:39,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 07:53:39,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 07:53:39,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 07:53:39,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 07:53:39,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 07:53:39,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 07:53:39,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 07:53:39,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 07:53:39,369 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 07:53:39,369 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 07:53:39,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 07:53:39,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 07:53:39,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 07:53:39,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 07:53:39,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 07:53:39,375 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-17 07:53:39,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 07:53:39,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 07:53:39,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 07:53:39,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 07:53:39,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 07:53:39,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 07:53:39,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 07:53:39,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 07:53:39,408 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 07:53:39,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 07:53:39,409 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 07:53:39,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 07:53:39,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 07:53:39,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 07:53:39,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 07:53:39,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 07:53:39,410 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-17 07:53:39,410 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-17 07:53:39,410 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-17 07:53:39,411 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 07:53:39,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 07:53:39,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 07:53:39,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 07:53:39,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 07:53:39,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 07:53:39,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 07:53:39,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 07:53:39,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 07:53:39,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 07:53:39,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 07:53:39,412 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-17 07:53:39,412 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-17 07:53:39,413 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 07:53:39,413 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 07:53:39,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 07:53:39,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 07:53:39,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-17 07:53:39,414 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1947c2cfa9d661d99206b001fd8998d6aae9b547d6aa58efd3f1b0fdfd07645 [2021-12-17 07:53:39,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 07:53:39,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 07:53:39,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 07:53:39,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 07:53:39,709 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 07:53:39,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2021-12-17 07:53:39,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d9a4373e/0933303c520b421cb61f3033dd653505/FLAG940791e17 [2021-12-17 07:53:40,123 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 07:53:40,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2021-12-17 07:53:40,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d9a4373e/0933303c520b421cb61f3033dd653505/FLAG940791e17 [2021-12-17 07:53:40,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d9a4373e/0933303c520b421cb61f3033dd653505 [2021-12-17 07:53:40,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 07:53:40,146 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 07:53:40,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 07:53:40,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 07:53:40,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 07:53:40,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:53:40" (1/1) ... [2021-12-17 07:53:40,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1776211a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:40, skipping insertion in model container [2021-12-17 07:53:40,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:53:40" (1/1) ... [2021-12-17 07:53:40,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 07:53:40,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 07:53:40,333 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/float-newlib/float_req_bl_1250.c[1719,1732] [2021-12-17 07:53:40,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 07:53:40,344 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 07:53:40,369 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/float-newlib/float_req_bl_1250.c[1719,1732] [2021-12-17 07:53:40,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 07:53:40,382 INFO L208 MainTranslator]: Completed translation [2021-12-17 07:53:40,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:40 WrapperNode [2021-12-17 07:53:40,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 07:53:40,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 07:53:40,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 07:53:40,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 07:53:40,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:40" (1/1) ... [2021-12-17 07:53:40,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:40" (1/1) ... [2021-12-17 07:53:40,413 INFO L137 Inliner]: procedures = 20, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 48 [2021-12-17 07:53:40,414 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 07:53:40,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 07:53:40,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 07:53:40,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 07:53:40,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:40" (1/1) ... [2021-12-17 07:53:40,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:40" (1/1) ... [2021-12-17 07:53:40,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:40" (1/1) ... [2021-12-17 07:53:40,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:40" (1/1) ... [2021-12-17 07:53:40,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:40" (1/1) ... [2021-12-17 07:53:40,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:40" (1/1) ... [2021-12-17 07:53:40,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:40" (1/1) ... [2021-12-17 07:53:40,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 07:53:40,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 07:53:40,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 07:53:40,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 07:53:40,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:40" (1/1) ... [2021-12-17 07:53:40,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 07:53:40,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 07:53:40,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 07:53:40,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 07:53:40,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 07:53:40,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 07:53:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 07:53:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-12-17 07:53:40,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-12-17 07:53:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-17 07:53:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 07:53:40,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 07:53:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-12-17 07:53:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 07:53:40,548 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 07:53:40,549 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 07:53:40,643 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 07:53:40,659 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 07:53:40,659 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 07:53:40,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:53:40 BoogieIcfgContainer [2021-12-17 07:53:40,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 07:53:40,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 07:53:40,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 07:53:40,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 07:53:40,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 07:53:40" (1/3) ... [2021-12-17 07:53:40,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147ec576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:53:40, skipping insertion in model container [2021-12-17 07:53:40,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:53:40" (2/3) ... [2021-12-17 07:53:40,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147ec576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:53:40, skipping insertion in model container [2021-12-17 07:53:40,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:53:40" (3/3) ... [2021-12-17 07:53:40,665 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1250.c [2021-12-17 07:53:40,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 07:53:40,668 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 07:53:40,694 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 07:53:40,698 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 07:53:40,698 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 07:53:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 07:53:40,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 07:53:40,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:40,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:40,724 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:40,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:40,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2048951326, now seen corresponding path program 1 times [2021-12-17 07:53:40,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 07:53:40,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958056599] [2021-12-17 07:53:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:40,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 07:53:40,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 07:53:40,737 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 07:53:40,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 07:53:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:40,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 07:53:40,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 07:53:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:53:40,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 07:53:40,842 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 07:53:40,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958056599] [2021-12-17 07:53:40,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958056599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:40,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:40,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 07:53:40,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640156598] [2021-12-17 07:53:40,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:40,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 07:53:40,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 07:53:40,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 07:53:40,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 07:53:40,863 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:40,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:40,877 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2021-12-17 07:53:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 07:53:40,879 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-17 07:53:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:40,883 INFO L225 Difference]: With dead ends: 47 [2021-12-17 07:53:40,884 INFO L226 Difference]: Without dead ends: 22 [2021-12-17 07:53:40,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 07:53:40,891 INFO L933 BasicCegarLoop]: 32 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, 32 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 [2021-12-17 07:53:40,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 07:53:40,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-17 07:53:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-17 07:53:40,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 07:53:40,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2021-12-17 07:53:40,918 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 13 [2021-12-17 07:53:40,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:40,919 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2021-12-17 07:53:40,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:40,919 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2021-12-17 07:53:40,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 07:53:40,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:40,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:40,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-17 07:53:41,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 07:53:41,129 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:41,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:41,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1561923165, now seen corresponding path program 1 times [2021-12-17 07:53:41,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 07:53:41,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663669067] [2021-12-17 07:53:41,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:41,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 07:53:41,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 07:53:41,143 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 07:53:41,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 07:53:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:41,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 07:53:41,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 07:53:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:53:41,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 07:53:41,321 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 07:53:41,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663669067] [2021-12-17 07:53:41,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663669067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:41,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:41,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 07:53:41,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002503176] [2021-12-17 07:53:41,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:41,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 07:53:41,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 07:53:41,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 07:53:41,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 07:53:41,324 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:41,374 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2021-12-17 07:53:41,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 07:53:41,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-17 07:53:41,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:41,376 INFO L225 Difference]: With dead ends: 30 [2021-12-17 07:53:41,376 INFO L226 Difference]: Without dead ends: 25 [2021-12-17 07:53:41,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 07:53:41,377 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:53:41,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 07:53:41,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-17 07:53:41,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-17 07:53:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 07:53:41,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-12-17 07:53:41,382 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 14 [2021-12-17 07:53:41,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:41,383 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-12-17 07:53:41,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:41,383 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-12-17 07:53:41,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 07:53:41,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:41,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:41,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-17 07:53:41,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 07:53:41,584 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:41,585 INFO L85 PathProgramCache]: Analyzing trace with hash -925102245, now seen corresponding path program 1 times [2021-12-17 07:53:41,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 07:53:41,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92476313] [2021-12-17 07:53:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:41,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 07:53:41,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 07:53:41,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 07:53:41,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 07:53:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:41,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 07:53:41,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 07:53:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:53:41,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 07:53:41,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 07:53:41,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92476313] [2021-12-17 07:53:41,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92476313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:41,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:41,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 07:53:41,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854180635] [2021-12-17 07:53:41,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:41,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 07:53:41,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 07:53:41,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 07:53:41,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 07:53:41,660 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:41,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:41,687 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2021-12-17 07:53:41,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 07:53:41,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-17 07:53:41,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:41,688 INFO L225 Difference]: With dead ends: 33 [2021-12-17 07:53:41,688 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 07:53:41,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 07:53:41,689 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:53:41,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 07:53:41,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 07:53:41,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-12-17 07:53:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 07:53:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-12-17 07:53:41,694 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 15 [2021-12-17 07:53:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:41,694 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-12-17 07:53:41,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:41,694 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-12-17 07:53:41,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 07:53:41,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:41,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:41,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-17 07:53:41,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 07:53:41,903 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:41,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:41,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1962795417, now seen corresponding path program 1 times [2021-12-17 07:53:41,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 07:53:41,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149383721] [2021-12-17 07:53:41,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:41,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 07:53:41,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 07:53:41,909 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 07:53:41,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 07:53:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:41,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 07:53:41,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 07:53:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:53:42,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 07:53:42,009 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 07:53:42,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149383721] [2021-12-17 07:53:42,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149383721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:42,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:42,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 07:53:42,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802808084] [2021-12-17 07:53:42,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:42,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 07:53:42,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 07:53:42,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 07:53:42,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 07:53:42,011 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:42,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:42,039 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2021-12-17 07:53:42,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 07:53:42,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-17 07:53:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:42,041 INFO L225 Difference]: With dead ends: 33 [2021-12-17 07:53:42,041 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 07:53:42,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 07:53:42,042 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:53:42,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 07:53:42,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 07:53:42,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-12-17 07:53:42,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 07:53:42,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-12-17 07:53:42,052 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 16 [2021-12-17 07:53:42,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:42,052 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-12-17 07:53:42,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:42,053 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-12-17 07:53:42,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-17 07:53:42,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:42,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:42,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-17 07:53:42,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 07:53:42,280 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:42,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1417426806, now seen corresponding path program 1 times [2021-12-17 07:53:42,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 07:53:42,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400822353] [2021-12-17 07:53:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:42,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 07:53:42,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 07:53:42,283 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 07:53:42,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 07:53:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:42,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 07:53:42,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 07:53:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:53:42,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 07:53:42,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 07:53:42,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400822353] [2021-12-17 07:53:42,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400822353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:42,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:42,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 07:53:42,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424163833] [2021-12-17 07:53:42,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:42,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 07:53:42,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 07:53:42,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 07:53:42,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 07:53:42,486 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:42,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:42,535 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-12-17 07:53:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 07:53:42,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-17 07:53:42,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:42,538 INFO L225 Difference]: With dead ends: 35 [2021-12-17 07:53:42,538 INFO L226 Difference]: Without dead ends: 30 [2021-12-17 07:53:42,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 07:53:42,541 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:53:42,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 114 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-12-17 07:53:42,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-17 07:53:42,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-12-17 07:53:42,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 07:53:42,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-12-17 07:53:42,545 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 17 [2021-12-17 07:53:42,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:42,545 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-12-17 07:53:42,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 07:53:42,545 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-12-17 07:53:42,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 07:53:42,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:42,546 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:42,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-17 07:53:42,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 07:53:42,758 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:42,759 INFO L85 PathProgramCache]: Analyzing trace with hash 642927512, now seen corresponding path program 1 times [2021-12-17 07:53:42,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 07:53:42,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264096622] [2021-12-17 07:53:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:42,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 07:53:42,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 07:53:42,760 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 07:53:42,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 07:53:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:42,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 07:53:42,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 07:53:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 07:53:42,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 07:53:42,864 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 07:53:42,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264096622] [2021-12-17 07:53:42,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264096622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:42,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:42,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 07:53:42,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826117865] [2021-12-17 07:53:42,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:42,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 07:53:42,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 07:53:42,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 07:53:42,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 07:53:42,866 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 07:53:42,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:42,899 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2021-12-17 07:53:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 07:53:42,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-12-17 07:53:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:42,900 INFO L225 Difference]: With dead ends: 30 [2021-12-17 07:53:42,900 INFO L226 Difference]: Without dead ends: 25 [2021-12-17 07:53:42,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 07:53:42,901 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:53:42,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 07:53:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-17 07:53:42,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-17 07:53:42,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 07:53:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-12-17 07:53:42,905 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 22 [2021-12-17 07:53:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:42,905 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-12-17 07:53:42,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 07:53:42,906 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-12-17 07:53:42,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 07:53:42,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:42,906 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:42,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-17 07:53:43,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 07:53:43,115 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:43,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:43,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1233179256, now seen corresponding path program 1 times [2021-12-17 07:53:43,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 07:53:43,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610906990] [2021-12-17 07:53:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:43,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 07:53:43,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 07:53:43,117 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 07:53:43,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-17 07:53:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:43,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 07:53:43,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 07:53:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 07:53:43,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 07:53:43,221 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 07:53:43,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610906990] [2021-12-17 07:53:43,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610906990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:43,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:43,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 07:53:43,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628148761] [2021-12-17 07:53:43,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:43,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 07:53:43,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 07:53:43,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 07:53:43,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 07:53:43,223 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 07:53:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:43,239 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-12-17 07:53:43,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 07:53:43,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-12-17 07:53:43,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:43,243 INFO L225 Difference]: With dead ends: 33 [2021-12-17 07:53:43,243 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 07:53:43,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 07:53:43,244 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:53:43,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 83 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 07:53:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 07:53:43,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-12-17 07:53:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 07:53:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-12-17 07:53:43,247 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 23 [2021-12-17 07:53:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:43,248 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-12-17 07:53:43,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 07:53:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-12-17 07:53:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 07:53:43,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:43,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:43,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-17 07:53:43,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 07:53:43,459 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:43,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:43,460 INFO L85 PathProgramCache]: Analyzing trace with hash 977434878, now seen corresponding path program 1 times [2021-12-17 07:53:43,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 07:53:43,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351626387] [2021-12-17 07:53:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:43,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 07:53:43,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 07:53:43,466 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 07:53:43,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-17 07:53:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:43,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 07:53:43,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 07:53:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 07:53:43,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 07:53:43,574 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 07:53:43,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351626387] [2021-12-17 07:53:43,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351626387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:43,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:43,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 07:53:43,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490238560] [2021-12-17 07:53:43,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:43,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 07:53:43,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 07:53:43,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 07:53:43,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 07:53:43,575 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 07:53:43,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:43,577 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-12-17 07:53:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 07:53:43,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-17 07:53:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:43,577 INFO L225 Difference]: With dead ends: 36 [2021-12-17 07:53:43,577 INFO L226 Difference]: Without dead ends: 30 [2021-12-17 07:53:43,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 07:53:43,578 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:53:43,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 50 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 1 Unchecked, 0.0s Time] [2021-12-17 07:53:43,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-17 07:53:43,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2021-12-17 07:53:43,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 07:53:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-12-17 07:53:43,581 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 24 [2021-12-17 07:53:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:43,581 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-12-17 07:53:43,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 07:53:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-12-17 07:53:43,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 07:53:43,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:43,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:43,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-17 07:53:43,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 07:53:43,790 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:43,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:43,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1034693180, now seen corresponding path program 1 times [2021-12-17 07:53:43,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 07:53:43,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286136833] [2021-12-17 07:53:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:43,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 07:53:43,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 07:53:43,792 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 07:53:43,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-17 07:53:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:43,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 07:53:43,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 07:53:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 07:53:43,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 07:53:43,973 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 07:53:43,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286136833] [2021-12-17 07:53:43,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286136833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:43,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:43,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 07:53:43,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002610613] [2021-12-17 07:53:43,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:43,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 07:53:43,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 07:53:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 07:53:43,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 07:53:43,975 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 07:53:43,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:43,992 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-12-17 07:53:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 07:53:43,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-17 07:53:43,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:43,992 INFO L225 Difference]: With dead ends: 30 [2021-12-17 07:53:43,992 INFO L226 Difference]: Without dead ends: 22 [2021-12-17 07:53:43,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 07:53:43,993 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:53:43,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 131 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-12-17 07:53:43,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-17 07:53:43,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-17 07:53:43,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 07:53:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-17 07:53:43,996 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 24 [2021-12-17 07:53:43,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:43,996 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-17 07:53:43,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 07:53:43,996 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-17 07:53:43,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 07:53:43,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:43,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:44,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-17 07:53:44,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 07:53:44,205 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:44,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:44,205 INFO L85 PathProgramCache]: Analyzing trace with hash -881640172, now seen corresponding path program 1 times [2021-12-17 07:53:44,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 07:53:44,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065817567] [2021-12-17 07:53:44,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:44,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 07:53:44,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 07:53:44,211 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 07:53:44,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-17 07:53:44,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:44,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 07:53:44,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 07:53:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 07:53:44,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 07:53:44,312 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 07:53:44,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065817567] [2021-12-17 07:53:44,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065817567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:44,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:44,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 07:53:44,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732858523] [2021-12-17 07:53:44,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:44,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 07:53:44,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 07:53:44,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 07:53:44,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 07:53:44,313 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 07:53:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:44,329 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-12-17 07:53:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 07:53:44,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-17 07:53:44,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:44,330 INFO L225 Difference]: With dead ends: 30 [2021-12-17 07:53:44,330 INFO L226 Difference]: Without dead ends: 24 [2021-12-17 07:53:44,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 07:53:44,330 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:53:44,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 07:53:44,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-17 07:53:44,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-12-17 07:53:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 07:53:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-17 07:53:44,333 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 24 [2021-12-17 07:53:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:44,333 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-17 07:53:44,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 07:53:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-17 07:53:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 07:53:44,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:53:44,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:44,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-17 07:53:44,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 07:53:44,541 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:53:44,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:53:44,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1550253923, now seen corresponding path program 1 times [2021-12-17 07:53:44,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 07:53:44,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643324232] [2021-12-17 07:53:44,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:53:44,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 07:53:44,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 07:53:44,543 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 07:53:44,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-17 07:53:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:53:44,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 07:53:44,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 07:53:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 07:53:44,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 07:53:44,693 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 07:53:44,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643324232] [2021-12-17 07:53:44,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643324232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:53:44,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:53:44,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 07:53:44,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054901018] [2021-12-17 07:53:44,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:53:44,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 07:53:44,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 07:53:44,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 07:53:44,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 07:53:44,694 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 07:53:44,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:53:44,720 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-12-17 07:53:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 07:53:44,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-12-17 07:53:44,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:53:44,720 INFO L225 Difference]: With dead ends: 22 [2021-12-17 07:53:44,720 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 07:53:44,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 07:53:44,721 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:53:44,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 5 Unchecked, 0.0s Time] [2021-12-17 07:53:44,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 07:53:44,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 07:53:44,722 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) [2021-12-17 07:53:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 07:53:44,722 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-12-17 07:53:44,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:53:44,722 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 07:53:44,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 07:53:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 07:53:44,722 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 07:53:44,724 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 07:53:44,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-17 07:53:44,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 07:53:44,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 07:53:44,977 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-17 07:53:44,977 INFO L854 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (= |ULTIMATE.start_isnan_float_#res#1| (_ bv1 32)) [2021-12-17 07:53:44,977 INFO L858 garLoopResultBuilder]: For program point L52(line 52) no Hoare annotation was computed. [2021-12-17 07:53:44,977 INFO L858 garLoopResultBuilder]: For program point L52-2(line 52) no Hoare annotation was computed. [2021-12-17 07:53:44,977 INFO L854 garLoopResultBuilder]: At program point L52-3(lines 44 53) the Hoare annotation is: (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmax_float_#res#1| (fp.div currentRoundingMode (_ +zero 8 24) (_ +zero 8 24)))) [2021-12-17 07:53:44,977 INFO L861 garLoopResultBuilder]: At program point L71(lines 58 72) the Hoare annotation is: true [2021-12-17 07:53:44,977 INFO L858 garLoopResultBuilder]: For program point L67(line 67) no Hoare annotation was computed. [2021-12-17 07:53:44,977 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-17 07:53:44,978 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-17 07:53:44,978 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-17 07:53:44,978 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 67) no Hoare annotation was computed. [2021-12-17 07:53:44,978 INFO L854 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (and (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmax_float_~y#1| (fp.div currentRoundingMode (_ +zero 8 24) (_ +zero 8 24)))) (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmax_float_~x#1| (fp.div currentRoundingMode (_ +zero 8 24) (_ +zero 8 24))))) [2021-12-17 07:53:44,978 INFO L858 garLoopResultBuilder]: For program point L49-1(lines 49 51) no Hoare annotation was computed. [2021-12-17 07:53:44,978 INFO L854 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmax_float_~y#1| (fp.div currentRoundingMode (_ +zero 8 24) (_ +zero 8 24)))) (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmax_float_~x#1| (fp.div currentRoundingMode (_ +zero 8 24) (_ +zero 8 24))))) [2021-12-17 07:53:44,978 INFO L858 garLoopResultBuilder]: For program point L45-1(lines 45 47) no Hoare annotation was computed. [2021-12-17 07:53:44,978 INFO L858 garLoopResultBuilder]: For program point L66(lines 66 69) no Hoare annotation was computed. [2021-12-17 07:53:44,978 INFO L858 garLoopResultBuilder]: For program point __fpclassify_floatFINAL(lines 21 42) no Hoare annotation was computed. [2021-12-17 07:53:44,978 INFO L858 garLoopResultBuilder]: For program point L38(lines 38 41) no Hoare annotation was computed. [2021-12-17 07:53:44,978 INFO L858 garLoopResultBuilder]: For program point L32(lines 32 41) no Hoare annotation was computed. [2021-12-17 07:53:44,978 INFO L858 garLoopResultBuilder]: For program point L24-1(lines 24 28) no Hoare annotation was computed. [2021-12-17 07:53:44,978 INFO L861 garLoopResultBuilder]: At program point L24-2(lines 24 28) the Hoare annotation is: true [2021-12-17 07:53:44,978 INFO L858 garLoopResultBuilder]: For program point L24-3(lines 21 42) no Hoare annotation was computed. [2021-12-17 07:53:44,978 INFO L861 garLoopResultBuilder]: At program point __fpclassify_floatENTRY(lines 21 42) the Hoare annotation is: true [2021-12-17 07:53:44,978 INFO L858 garLoopResultBuilder]: For program point __fpclassify_floatEXIT(lines 21 42) no Hoare annotation was computed. [2021-12-17 07:53:44,978 INFO L858 garLoopResultBuilder]: For program point L35(lines 35 41) no Hoare annotation was computed. [2021-12-17 07:53:44,980 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:53:44,981 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 07:53:44,988 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2021-12-17 07:53:44,989 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2021-12-17 07:53:44,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 07:53:44 BoogieIcfgContainer [2021-12-17 07:53:44,989 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 07:53:44,990 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 07:53:44,990 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 07:53:44,990 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 07:53:44,990 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:53:40" (3/4) ... [2021-12-17 07:53:44,992 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 07:53:44,996 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2021-12-17 07:53:44,998 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-12-17 07:53:44,998 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-12-17 07:53:44,998 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 07:53:44,999 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 07:53:45,020 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (\exists currentRoundingMode : FloatRoundingMode :: \result == ~fp.div~FLOAT(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE())) [2021-12-17 07:53:45,020 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: \result == 1bv32 [2021-12-17 07:53:45,026 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 07:53:45,026 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 07:53:45,026 INFO L158 Benchmark]: Toolchain (without parser) took 4880.42ms. Allocated memory was 62.9MB in the beginning and 94.4MB in the end (delta: 31.5MB). Free memory was 42.7MB in the beginning and 51.1MB in the end (delta: -8.4MB). Peak memory consumption was 22.6MB. Max. memory is 16.1GB. [2021-12-17 07:53:45,026 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 62.9MB. Free memory was 43.3MB in the beginning and 43.3MB in the end (delta: 52.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 07:53:45,027 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.75ms. Allocated memory is still 62.9MB. Free memory was 42.5MB in the beginning and 44.4MB in the end (delta: -1.9MB). Peak memory consumption was 11.2MB. Max. memory is 16.1GB. [2021-12-17 07:53:45,027 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.68ms. Allocated memory is still 62.9MB. Free memory was 44.4MB in the beginning and 42.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 07:53:45,027 INFO L158 Benchmark]: Boogie Preprocessor took 38.08ms. Allocated memory is still 62.9MB. Free memory was 42.8MB in the beginning and 41.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 07:53:45,027 INFO L158 Benchmark]: RCFGBuilder took 207.71ms. Allocated memory is still 62.9MB. Free memory was 41.4MB in the beginning and 30.6MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 07:53:45,027 INFO L158 Benchmark]: TraceAbstraction took 4328.05ms. Allocated memory was 62.9MB in the beginning and 94.4MB in the end (delta: 31.5MB). Free memory was 30.2MB in the beginning and 54.8MB in the end (delta: -24.6MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2021-12-17 07:53:45,027 INFO L158 Benchmark]: Witness Printer took 36.04ms. Allocated memory is still 94.4MB. Free memory was 54.0MB in the beginning and 51.1MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 07:53:45,028 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 62.9MB. Free memory was 43.3MB in the beginning and 43.3MB in the end (delta: 52.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 234.75ms. Allocated memory is still 62.9MB. Free memory was 42.5MB in the beginning and 44.4MB in the end (delta: -1.9MB). Peak memory consumption was 11.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.68ms. Allocated memory is still 62.9MB. Free memory was 44.4MB in the beginning and 42.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.08ms. Allocated memory is still 62.9MB. Free memory was 42.8MB in the beginning and 41.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 207.71ms. Allocated memory is still 62.9MB. Free memory was 41.4MB in the beginning and 30.6MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4328.05ms. Allocated memory was 62.9MB in the beginning and 94.4MB in the end (delta: 31.5MB). Free memory was 30.2MB in the beginning and 54.8MB in the end (delta: -24.6MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. * Witness Printer took 36.04ms. Allocated memory is still 94.4MB. Free memory was 54.0MB in the beginning and 51.1MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] * 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: 67]: 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 2 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.3s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20 mSDsluCounter, 892 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 34 IncrementalHoareTripleChecker+Unchecked, 584 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 64 IncrementalHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 308 mSDtfsCounter, 64 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 48, 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, 11 MinimizatonAttempts, 24 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 19 NumberOfFragments, 43 HoareAnnotationTreeSize, 11 FomulaSimplifications, 12 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 16 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 217 NumberOfCodeBlocks, 217 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 206 ConstructedInterpolants, 20 QuantifiedInterpolants, 374 SizeOfPredicates, 32 NumberOfNonLiveVariables, 779 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 36/36 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: 56]: Loop Invariant Derived loop invariant: \result == 1bv32 - InvariantResult [Line: 44]: Loop Invariant [2021-12-17 07:53:45,032 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2021-12-17 07:53:45,032 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] Derived loop invariant: (\exists currentRoundingMode : FloatRoundingMode :: \result == ~fp.div~FLOAT(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE())) - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-12-17 07:53:45,071 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